fzus61 kbuf 242002
glflo 
expires:202608250300;;296287

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon aug 24 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a ridge averaging 30.1 inches will build from the 
western and central great lakes tuesday through wednesday. the ridge 
will exit eastward thursday and allow a warm front to sweep 
northeastward across lake ontario. friday, a cold front should sweep 
eastward across the lake and be followed by a high pressure ridge 
averaging 30.0 inches and building from the upper midwest.


loz062-250300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt mon aug 24 2026

.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of waterspouts through the early overnight.
showers likely with a chance of thunderstorms early, then a
chance of showers from late evening on. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.tuesday night...west winds 10 knots or less becoming southwest.
waves 2 feet or less. 
.wednesday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.wednesday night...southeast winds 5 to 15 knots becoming south.
a chance of showers overnight. waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming northwest.
showers likely with a chance of thunderstorms during the day,
then a chance of showers and thunderstorms thursday night. waves
1 to 2 feet. 
.friday...northwest winds 5 to 10 knots becoming north. waves
1 foot or less. 
.saturday...north winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 242002
glflo 
expires:202608250300;;296288

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon aug 24 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a ridge averaging 30.1 inches will build from the 
western and central great lakes tuesday through wednesday. the ridge 
will exit eastward thursday and allow a warm front to sweep 
northeastward across lake ontario. friday, a cold front should sweep 
eastward across the lake and be followed by a high pressure ridge 
averaging 30.0 inches and building from the upper midwest.


loz063>065-250300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon aug 24 2026

.tonight...southwest winds 15 to 20 knots becoming northwest. a
chance of waterspouts through the early overnight. showers with a
chance of thunderstorms this evening, then showers likely after
midnight. waves 3 to 6 feet. 
.tuesday...northwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers in the morning. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.wednesday...southwest winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.wednesday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet. 
.thursday...south winds 15 to 20 knots becoming west 5 to
15 knots. showers likely with a chance of thunderstorms. waves
1 to 3 feet. 
.friday...northwest winds 5 to 10 knots becoming north. waves
2 feet or less. 
.saturday...north winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 241952
glfle 
expires:202608250215;;295969

open lake forecast for lake erie
national weather service cleveland oh
352 pm edt mon aug 24 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
high pressure 30.00 inches builds across the great lakes tonight 
into wednesday. low pressure 29.80 inches will track through the 
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 inches will return friday and
saturday.


lez164-165-250215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
352 pm edt mon aug 24 2026

.tonight...west winds 10 to 15 knots becoming northwest. waves
2 to 4 feet subsiding to 1 to 2 feet. 
.tuesday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.tuesday night...south winds 10 knots or less. waves 1 foot or
less. 
.wednesday...south winds around 10 knots becoming southwest.
waves 1 foot or less. 
.wednesday night...south winds 10 to 15 knots becoming southwest.
a chance of showers overnight. waves 1 to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming northwest
10 knots or less. a chance of showers and thunderstorms during
the day, then a chance of showers thursday night. waves 2 feet or
less. 
.friday...north winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.saturday...northwest winds 5 to 10 knots becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 241952
glfle 
expires:202608250215;;295968

open lake forecast for lake erie
national weather service cleveland oh
352 pm edt mon aug 24 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
high pressure 30.00 inches builds across the great lakes tonight 
into wednesday. low pressure 29.80 inches will track through the 
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 inches will return friday and
saturday.


lez162-163-250215-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
352 pm edt mon aug 24 2026

.tonight...west winds 10 to 15 knots becoming northwest. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday night...south winds 5 to 10 knots. waves 1 foot or less.
.wednesday...southwest winds 5 to 10 knots. waves 1 foot or less.
.wednesday night...southwest winds 10 to 15 knots. showers likely
in the evening, then a chance of showers overnight. waves 1 to
2 feet. 
.thursday...west winds 10 knots or less becoming north. waves
1 foot or less. 
.friday...north winds 5 to 10 knots becoming east. waves 1 foot
or less. 
.saturday...north winds 5 to 10 knots becoming south. waves
1 foot or less. 

$$

fzus61 kcle 241952
glfle 
expires:202608250215;;295970

open lake forecast for lake erie
national weather service cleveland oh
352 pm edt mon aug 24 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
high pressure 30.00 inches builds across the great lakes tonight 
into wednesday. low pressure 29.80 inches will track through the 
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 inches will return friday and
saturday.


lez061-166>169-250215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
352 pm edt mon aug 24 2026

.tonight...west winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. a chance of waterspouts. a chance
of showers early, then a slight chance of showers from late
evening on. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.tuesday...northwest winds 5 to 10 knots becoming west. a slight
chance of showers early. a chance of waterspouts in the morning.
waves 2 feet or less. 
.tuesday night...west winds 10 knots or less becoming south.
waves 1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.wednesday night...south winds 10 to 15 knots becoming southwest.
showers likely overnight. waves 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots becoming northwest. a
chance of showers. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.saturday...north winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 241945
glflh 
expires:202608250345;;295744

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt mon aug 24 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.


lhz462>464-250345-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
345 pm edt mon aug 24 2026

.tonight...northwest winds 10 to 15 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.tuesday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.tuesday night...east winds 5 to 10 knots veering to the south by
midnight...then increasing to 10 to 15 knots after midnight.
waves 2 feet or less. 
.wednesday...south winds 10 to 15 knots. a chance of showers in
the afternoon. waves 1 to 3 feet building to 2 to 4 feet early in
the afternoon. 
.wednesday night...south winds 10 to 15 knots. showers and a
chance of thunderstorms in the evening. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight. 
.thursday...southwest winds 10 to 15 knots becoming west 5 to
10 knots late in the morning...then veering to the north late in
the afternoon. waves 2 feet or less. 
.friday...northwest winds 10 to 15 knots becoming north 5 to
10 knots . waves 1 to 3 feet. 
.saturday...east winds 5 to 10 knots veering to the southeast
until early evening...then becoming south 10 to 15 knots by
midnight. waves 2 feet or less. 


$$

fzus63 kdtx 241945
glflh 
expires:202608250345;;295742

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt mon aug 24 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.


lhz361-250345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
345 pm edt mon aug 24 2026

.tonight...northwest winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots after midnight. waves 2 feet or less. 
.wednesday...south winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. a chance of showers in the
morning...then showers and a chance of thunderstorms in the
afternoon. waves 1 to 3 feet. 
.wednesday night...southwest winds 5 to 10 knots becoming west
10 to 15 knots after midnight. showers and a chance of
thunderstorms in the evening. waves 1 to 3 feet. 
.thursday...west winds 10 to 15 knots becoming northwest 15 to
20 knots late in the afternoon...then decreasing to 10 to
15 knots late in the evening. waves 1 to 3 feet building to 2 to
4 feet late in the afternoon. 
.friday...northwest winds 5 to 10 knots backing to the west early
in the evening...then becoming light and variable by midnight.
waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 241945
glflh 
expires:202608250345;;295743

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt mon aug 24 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.


lhz362-363-250345-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
345 pm edt mon aug 24 2026

.tonight...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 4 to 6 feet subsiding to 2 to 4 feet early in the
morning. waves occasionally around 8 feet. 
.tuesday...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.tuesday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. waves 2 feet or
less. 
.wednesday...south winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. showers likely and a chance of
thunderstorms in the afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon. 
.wednesday night...south winds 10 to 15 knots veering to the
southwest after midnight. showers likely and a chance of
thunderstorms in the evening. waves 3 to 5 feet. 
.thursday...west winds 10 to 15 knots decreasing to 5 to 10 knots
late in the morning...then becoming northwest 10 to 15 knots late
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet late
in the afternoon. 
.friday...north winds 10 to 15 knots becoming light and variable.
waves 1 to 3 feet. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 241945
glfsc 
expires:202608250345;;295747

lake st clair forecast
national weather service detroit/pontiac mi
345 pm edt mon aug 24 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for showers and
thunderstorms.


lcz460-250345-
lake st clair-
345 pm edt mon aug 24 2026

.tonight...northwest winds 5 to 10 knots. mostly cloudy this evening
becoming mostly clear. waves 2 feet or less.
.tuesday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming southeast 5 to 10 knots
late in the afternoon. mostly sunny. waves 2 feet or less.
.tuesday night...south winds 5 to 10 knots. partly cloudy. waves 2
feet or less.
.wednesday...southwest winds 5 to 10 knots becoming south 10 to 15
knots in the late morning and afternoon. partly sunny. waves 2 feet
or less.
.wednesday night...southwest winds 10 to 15 knots. partly cloudy. a
chance of thunderstorms early in the evening. light showers likely .
waves 2 feet or less.
.thursday...west winds 5 to 10 knots veering to the north in the
evening. mostly sunny becoming partly cloudy. waves 2 feet or less.
.friday...northeast winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.saturday...southeast winds 5 to 10 knots. mostly clear. waves 2
feet or less.

$$

fzus63 kmkx 241928
glflm 
expires:202608250315;;295310

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
228 pm cdt mon aug 24 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

29.7 inch low pressure remains nearly stationary over western 
quebec this afternoon, resulting in continued breezy northwest 
winds across the open waters of lake michigan. the breezy 
conditions will continue through through the remainder of the 
afternoon as the low lingers over the same general vicinity. 
currently centered from western lake superior toward north-central
wisconsin, 30.1 inch high pressure will gradually work over lake 
michigan this evening, bringing decreasing winds. expect readings 
to become light and variable near or just after sunset.

light and variable winds will continue into tonight as high pressure 
lingers over the western great lakes. the high will shift east into 
ontario tomorrow, resulting in a south-southwest wind shift across 
the waters. 29.7 inch low pressure will approach from the 
northern great plains tomorrow night into wednesday, reinforcing 
the south-southwesterly wind pattern. the low will cross lake 
michigan during the second half of the day wednesday, bringing a 
breezy northwest wind shift. gales are not expected as this 
occurs. showers and thunderstorms will accompany the 
approaching/passing surface low tomorrow night into wednesday 
afternoon. widespread severe weather is unlikely in these storms, 
though an isolated stronger storm with hail and gusty winds can't 
be ruled out. the next area of 30.1 inch high pressure will 
gradually build toward lake michigan from the northern great 
plains wednesday night through friday, bringing slowly decreasing 
winds. shower and storm chances return this weekend. whether any 
storms will be severe remains uncertain, with trends being 
monitored through this week.


lmz261-362-364-366-563-565-567-868-250315-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
228 pm cdt mon aug 24 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 20 kt becoming northeast 10 to 15 kt
late this evening, then veering to southeast after midnight
becoming south late. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday...southwest winds 5 to 10 kt becoming south 15 to 25 kt.
waves 1 to 2 ft building to 3 to 5 ft. 
.tuesday night...south winds 15 to 25 kt. chance of showers
overnight. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...southwest winds to 30 kt. showers likely in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
chance of thunderstorms in the evening. waves 3 to 5 ft subsiding
to 1 to 3 ft. 
.thursday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. waves 1 to 3 ft. 
.thursday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 241928
glflm 
expires:202608250315;;295311

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
228 pm cdt mon aug 24 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

29.7 inch low pressure remains nearly stationary over western 
quebec this afternoon, resulting in continued breezy northwest 
winds across the open waters of lake michigan. the breezy 
conditions will continue through through the remainder of the 
afternoon as the low lingers over the same general vicinity. 
currently centered from western lake superior toward north-central
wisconsin, 30.1 inch high pressure will gradually work over lake 
michigan this evening, bringing decreasing winds. expect readings 
to become light and variable near or just after sunset.

light and variable winds will continue into tonight as high pressure 
lingers over the western great lakes. the high will shift east into 
ontario tomorrow, resulting in a south-southwest wind shift across 
the waters. 29.7 inch low pressure will approach from the 
northern great plains tomorrow night into wednesday, reinforcing 
the south-southwesterly wind pattern. the low will cross lake 
michigan during the second half of the day wednesday, bringing a 
breezy northwest wind shift. gales are not expected as this 
occurs. showers and thunderstorms will accompany the 
approaching/passing surface low tomorrow night into wednesday 
afternoon. widespread severe weather is unlikely in these storms, 
though an isolated stronger storm with hail and gusty winds can't 
be ruled out. the next area of 30.1 inch high pressure will 
gradually build toward lake michigan from the northern great 
plains wednesday night through friday, bringing slowly decreasing 
winds. shower and storm chances return this weekend. whether any 
storms will be severe remains uncertain, with trends being 
monitored through this week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-250315-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
228 pm cdt mon aug 24 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 15 kt veering to southwest.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.tuesday...south winds 5 to 10 kt increasing to 15 to 25 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday night...south winds 15 to 25 kt becoming southwest.
waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of showers in the morning, then showers likely with a
chance of thunderstorms in the afternoon. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest
10 to 15 kt. chance of thunderstorms in the evening. waves 3 to
5 ft subsiding to 1 to 3 ft. 
.thursday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.thursday night...northwest winds 10 to 20 kt becoming north
10 to 15 kt. waves 1 to 3 ft. 
.friday...north winds 10 to 15 kt. waves 1 to 2 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296186

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon aug 24 2026 /301 pm cdt mon aug 24 2026/

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots. a slight chance of showers
after midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering west after
midnight, then increasing to 10 to 20 knots late. a slight chance
of thunderstorms through midnight. a chance of showers. waves
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296187

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz263-250800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt mon aug 24 2026

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots backing southeast after
midnight, then veering south late. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east late. a chance
of showers. a chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
after midnight, then becoming west 10 to 20 knots late. a chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.wednesday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of showers. waves
building to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296188

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz264-250800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt mon aug 24 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots becoming south less than
10 knots late. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
late. showers likely through midnight. a chance of thunderstorms.
a chance of showers after midnight. waves building to 1 to
3 feet. 
.wednesday...west winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.thursday...north winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296189

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz265-250800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt mon aug 24 2026

.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots backing south late.
waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots. showers likely
through midnight. a slight chance of thunderstorms. a chance of
showers after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.wednesday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of showers and a slight
chance of thunderstorms. waves building to 1 to 3 feet. 
.wednesday night...west winds 15 to 25 knots veering northwest
after midnight. waves building to 2 to 4 feet. 
.thursday...north winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots becoming south 15 to
25 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296190

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz266-250800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt mon aug 24 2026

.late this afternoon...northwest winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots backing west after
midnight, then backing south late. waves subsiding to calm to
2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of showers through midnight. a slight
chance of thunderstorms. showers likely after midnight. waves
building to 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots veering west by mid
afternoon. a chance of showers and a slight chance of
thunderstorms. waves subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 15 to 25 knots. waves building
to 2 to 4 feet. 
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.thursday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 
.saturday...south winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296191

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz267-250800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt mon aug 24 2026

.late this afternoon...northwest winds 15 to 25 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon, then becoming east 10 to 20 knots late. a slight
chance of showers by mid afternoon. waves calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots. a chance of showers
through midnight. a slight chance of thunderstorms. showers after
midnight. waves building to 2 to 4 feet. 
.wednesday...south winds 10 to 20 knots veering west by mid
afternoon. showers through early afternoon. a slight chance of
thunderstorms. a chance of showers by mid afternoon. waves
subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.saturday...south winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$