fzus61 kbuf 272002
glflo 
expires:202608280300;;461461

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu aug 27 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 weak cold front will will cross the lower great lakes 
tonight. a 30.2 inch high will then build from the upper great lakes 
friday to the lower great lakes saturday before drifting off the new 
england coast sunday. a weak frontal boundary is then forecast to 
stall just north of the lake sunday night through tuesday.


loz063>065-280300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu aug 27 2026

.tonight...southwest winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.friday...north winds 10 knots or less becoming northwest. waves
2 feet or less. 
.friday night...west winds less than 10 knots. waves 1 foot or
less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.saturday night...southwest winds 5 to 15 knots. waves 2 feet or
less. 
.sunday...southwest winds 5 to 10 knots becoming south. showers
likely sunday night. waves 2 feet or less. 
.monday...south winds 5 to 10 knots becoming east. showers likely
with a chance of thunderstorms during the day, then a chance of
showers and thunderstorms monday night. waves 1 foot or less. 
.tuesday...east winds 5 to 10 knots becoming southwest. a chance
of showers during the day, then showers likely tuesday night.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 272002
glflo 
expires:202608280300;;461460

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu aug 27 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 weak cold front will will cross the lower great lakes 
tonight. a 30.2 inch high will then build from the upper great lakes 
friday to the lower great lakes saturday before drifting off the new 
england coast sunday. a weak frontal boundary is then forecast to 
stall just north of the lake sunday night through tuesday.


loz062-280300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu aug 27 2026

.tonight...west winds 10 to 15 knots becoming northwest. waves
1 to 2 feet. 
.friday...north winds 10 knots or less becoming south. waves
2 feet or less. 
.friday night...light and variable winds. waves 1 foot or less. 
.saturday...light and variable winds becoming southwest 5 to
10 knots. waves 1 foot or less. 
.saturday night...south winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. showers likely with a
chance of thunderstorms sunday night. waves 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming southeast.
showers likely with a chance of thunderstorms during the day,
then a chance of showers and thunderstorms monday night. waves
1 foot or less. 
.tuesday...southeast winds 5 to 10 knots becoming southwest. a
chance of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271955
glfle 
expires:202608280215;;461095

open lake forecast for lake erie
national weather service cleveland oh
355 pm edt thu aug 27 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...
a trough of 29.90 inches will move south of lake erie tonight
pulling a cold front across the lake. high pressure of 30.10 
inches builds into the great lakes friday before settling to the 
mid-atlantic region sunday. a warm front moves north across lake 
erie sunday night. low pressure of 29.70 inches will approach the
upper great lakes on tuesday. 


lez164>166-280215-
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-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-
355 pm edt thu aug 27 2026

.tonight...west winds 5 to 10 knots becoming northeast. a chance
of waterspouts from late evening on. a slight chance of showers
and thunderstorms. a slight chance of showers late. waves 1 foot
or less. 
.friday...northeast winds 5 to 10 knots. a chance of waterspouts
early. waves 1 to 2 feet. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday night...east winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. waves 1 to 2 feet. 
.monday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms tuesday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271955
glfle 
expires:202608280215;;461096

open lake forecast for lake erie
national weather service cleveland oh
355 pm edt thu aug 27 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...
a trough of 29.90 inches will move south of lake erie tonight
pulling a cold front across the lake. high pressure of 30.10 
inches builds into the great lakes friday before settling to the 
mid-atlantic region sunday. a warm front moves north across lake 
erie sunday night. low pressure of 29.70 inches will approach the
upper great lakes on tuesday. 


lez061-167>169-280215-
ripley to buffalo ny extending from 5nm 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-
355 pm edt thu aug 27 2026

.tonight...west winds 5 to 15 knots becoming north. a chance of
waterspouts from late evening on. waves 1 to 3 feet. 
.friday...north winds 10 knots or less becoming northeast. a
chance of waterspouts early. waves 2 feet or less. 
.friday night...north winds less than 10 knots becoming east.
waves 1 foot or less. 
.saturday...south winds less than 10 knots becoming west. waves
1 foot or less. 
.saturday night...south winds 10 knots or less. waves 1 foot or
less. 
.sunday...southwest winds 5 to 15 knots becoming south. a chance
of showers sunday night. waves 2 feet or less. 
.monday...southwest winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.tuesday...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms tuesday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 271955
glfle 
expires:202608280215;;461094

open lake forecast for lake erie
national weather service cleveland oh
355 pm edt thu aug 27 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...
a trough of 29.90 inches will move south of lake erie tonight
pulling a cold front across the lake. high pressure of 30.10 
inches builds into the great lakes friday before settling to the 
mid-atlantic region sunday. a warm front moves north across lake 
erie sunday night. low pressure of 29.70 inches will approach the
upper great lakes on tuesday. 


lez162-163-280215-
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-
355 pm edt thu aug 27 2026

.tonight...west winds 10 knots or less becoming northeast. a
chance of waterspouts late. waves 1 foot or less. 
.friday...northeast winds 10 knots or less becoming east. a
chance of waterspouts early. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. waves 1 foot or less. 
.monday...southwest winds around 10 knots. waves 1 foot or less. 
.tuesday...southwest winds around 10 knots. a chance of showers
and thunderstorms tuesday night. waves around 1 foot. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 271942
glfsc 
expires:202608280345;;460842

lake st clair forecast
national weather service detroit/pontiac mi
342 pm edt thu aug 27 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...moderate north-northwest winds in place through
daytime thursday before weakening overnight. high pressure, 30.20
inches, then crosses the central great lakes to close out the
week.


lcz460-280345-
lake st clair-
342 pm edt thu aug 27 2026

.tonight...north winds 5 to 10 knots becoming northeast 10 to 15
knots after midnight. mostly clear. waves 2 feet or less.
.friday...north winds 5 to 10 knots until late afternoon becoming
light and variable. mostly sunny. waves 2 feet or less.
.friday night...east winds 5 to 10 knots veering to the south after
midnight. clear. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots becoming south 10 to 15
knots early in the afternoon. mostly sunny. waves 2 feet or less.
.saturday night...south winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. partly cloudy. waves 2 feet or less.
.sunday...southwest winds 5 to 10 knots becoming south 10 to 15
knots in the afternoon and evening. partly sunny...then partly
cloudy with a chance of showers in the evening. waves 2 feet or
less.
.monday...southwest winds 10 to 15 knots. mostly cloudy with a
chance of showers. waves 2 feet or less.
.tuesday...southwest winds 5 to 10 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 271942
glflh 
expires:202608280345;;460838

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt thu aug 27 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...moderate north-northwest winds in place through
daytime thursday before weakening overnight. high pressure, 30.20
inches, then crosses the central great lakes to close out the
week.


lhz361-362-280345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
342 pm edt thu aug 27 2026

.tonight...northwest winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.friday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 feet or less. 
.friday night...light and variable winds becoming south 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the afternoon. waves 2 feet or less. 
.saturday night...southwest winds 5 to 10 knots. a chance of
showers. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots backing to the east late
in the afternoon. a chance of showers in the morning. rain
showers likely. a chance of thunderstorms late in the afternoon.
waves 1 to 3 feet. 
.monday...east winds 5 to 10 knots. a chance of showers. a chance
of thunderstorms until early evening. waves 1 to 3 feet. 
.tuesday...east winds 5 to 10 knots veering to the southwest
early in the evening...then veering to the southwest 5 to
10 knots by midnight. a chance of showers early in the morning. a
chance of showers by midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 271942
glflh 
expires:202608280345;;460839

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt thu aug 27 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...moderate north-northwest winds in place through
daytime thursday before weakening overnight. high pressure, 30.20
inches, then crosses the central great lakes to close out the
week.


lhz363-462-280345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
342 pm edt thu aug 27 2026

.tonight...north winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots in the morning becoming light
and variable. waves 2 feet or less. 
.friday night...light and variable winds becoming east 5 to
10 knots by midnight...then veering to the south after midnight.
waves 2 feet or less. 
.saturday...southwest winds 10 to 15 knots. waves 2 feet or less.
.saturday night...south winds 10 to 15 knots becoming southwest
5 to 10 knots in the late evening and overnight. waves 1 to
3 feet. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
late in the afternoon. a chance of showers late in the morning.
rain showers likely and a chance of thunderstorms late in the
afternoon. waves 1 to 3 feet. 
.monday...south winds 5 to 10 knots. showers likely and a chance
of thunderstorms early in the morning...then a chance of showers.
waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots. a chance of showers.
waves 1 to 3 feet. 


$$

fzus63 kdtx 271942
glflh 
expires:202608280345;;460840

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt thu aug 27 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...moderate north-northwest winds in place through
daytime thursday before weakening overnight. high pressure, 30.20
inches, then crosses the central great lakes to close out the
week.


lhz463-464-280345-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
342 pm edt thu aug 27 2026

.tonight...north winds 5 to 10 knots increasing to 10 to 15 knots
by midnight...then decreasing to 5 to 10 knots early in the
morning. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...north winds 5 to 10 knots veering to the south
after midnight. waves 2 feet or less. 
.saturday...south winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. waves 2 feet or less. 
.saturday night...south winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots backing to the south late
in the afternoon. showers likely and a chance of thunderstorms
late in the afternoon. waves 1 to 3 feet. 
.monday...south winds 5 to 10 knots increasing to 10 to 15 knots
by midnight. showers likely and a chance of thunderstorms early
in the morning...then a chance of showers. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 


$$

fzus63 kmkx 271948
glflm 
expires:202608280315;;461004

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt thu aug 27 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...

modest northerly winds continue this afternoon as a low 
pressure trough of 29.9 inches exits eastward from lower
michigan. winds then become light and variable tonight and 
friday as high pressure of 30.2 inches moves from the northern 
great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.7
inches will slowly approach from the great plains. breezy 
southerly winds are expected this weekend into early next week,
but gusts are expected to remain below gale force.


lmz080-669-671-673-675-777-779-870-872-874-876-878-280315-
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-
248 pm cdt thu aug 27 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 20 kt diminishing to 5 to 10 kt
late this evening, then becoming northeast 5 to 10 kt after
midnight becoming east late. waves 1 to 3 ft subsiding to 1 to
2 ft. 
.friday...southeast winds 5 to 10 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.saturday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. waves 3 to 5 ft. 
.saturday night...south winds 15 to 25 kt. chance of showers.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.sunday night...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers and thunderstorms. waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt becoming south. chance of
showers. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south. chance of
showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 271948
glflm 
expires:202608280315;;461003

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt thu aug 27 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...

modest northerly winds continue this afternoon as a low 
pressure trough of 29.9 inches exits eastward from lower
michigan. winds then become light and variable tonight and 
friday as high pressure of 30.2 inches moves from the northern 
great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.7
inches will slowly approach from the great plains. breezy 
southerly winds are expected this weekend into early next week,
but gusts are expected to remain below gale force.


lmz261-362-364-366-563-565-567-868-280315-
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-
248 pm cdt thu aug 27 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 10 to 20 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...northeast winds 5 to 10 kt veering to south. waves 1 to
3 ft. 
.friday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt increasing to 30 kt.
waves 3 to 5 ft. 
.saturday night...southwest winds 15 to 25 kt. chance of showers
overnight. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. chance of showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.sunday night...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.monday...south winds 15 to 25 kt. chance of showers. waves 4 to
6 ft occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461228

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz264-280800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
357 pm edt thu aug 27 2026

.late this afternoon...west winds less than 10 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.friday...west winds less than 10 knots becoming south 5 to
15 knots late. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots diminishing to less
than 10 knots late. waves calm to 2 feet. 
.saturday...southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. a slight chance of showers. waves calm
to 2 feet. 
.saturday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. a chance of showers.
waves building to 1 to 3 feet. 
.monday...east winds 10 to 20 knots becoming southwest 5 to
15 knots. a chance of thunderstorms. a chance of showers. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots veering west. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461229

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz265-280800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
357 pm edt thu aug 27 2026

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

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461226

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
357 pm edt thu aug 27 2026 /257 pm cdt thu aug 27 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then veering southeast late. waves
calm to 2 feet. 
.friday night...east winds 5 to 15 knots becoming northeast less
than 10 knots after midnight, then increasing to 5 to 15 knots
late. a chance of showers after midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. a chance of showers. waves building to
1 to 3 feet. 
.sunday night...northeast winds 15 to 25 knots. a chance of
showers and thunderstorms. waves 1 to 3 feet. 
.monday...northeast winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461231

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz267-280800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
357 pm edt thu aug 27 2026

.late this afternoon...northwest winds 10 to 20 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 late. waves subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing southeast by mid
afternoon. a chance of showers by mid afternoon. waves calm to
2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.sunday...southeast winds 10 to 20 knots. a chance of showers
through early afternoon. showers likely by mid afternoon. waves
calm to 2 feet. 
.sunday night...east winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet. 
.monday...east winds 10 to 20 knots veering south. a chance of
showers. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.tuesday...southwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461230

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz266-280800-
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-
357 pm edt thu aug 27 2026

.late this afternoon...northwest winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north late.
waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing southeast by mid
afternoon. a chance of showers by mid afternoon. waves calm to
2 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...southeast winds 10 to 20 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.sunday night...east winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet. 
.monday...east winds 10 to 20 knots veering south. a chance of
showers and thunderstorms. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday...southwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 

$$

fzus63 kmqt 271958
glfls 
expires:202608280800;;461227

open lake forecast for lake superior
national weather service marquette mi
357 pm edt thu aug 27 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 30.1 inch high pressure over northern manitoba stretches towards 
lake superior through tonight, eventually becoming centered over 
lake superior at 30.2 inches by friday morning before continuing 
into new england on saturday. saturday night, a low pressure over 
the central to northern plains deepens to 29.6 inches. this low 
approaches the great lakes over the course of early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz263-280800-
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-
357 pm edt thu aug 27 2026

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds less than 10 knots. waves calm to
2 feet. 
.friday...east winds less than 10 knots becoming south 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots veering south late.
a slight chance of showers after midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing southeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming northeast 15 to
25 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.sunday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of showers and thunderstorms.
waves building to 1 to 3 feet. 
.monday...east winds 10 to 20 knots veering southwest. waves
building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$