fzus61 kbuf 180902
glflo 
expires:202511181600;;609818

open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue nov 18 2025

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 28.8 inch low over labrador today will continue to 
move northeast into the north atlantic through wednesday. a 30.2 
inch high centered over the upper great lakes today will build to 
the lower great lakes wednesday and to new england thursday. a cold 
front will then move east across the lower great lakes friday, 
followed by a 30.0 inch high building into the ohio valley and lower 
great lakes saturday.


loz062-181600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est tue nov 18 2025

.today...west winds 5 to 15 knots. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.tonight...northwest winds 10 knots or less becoming north. waves
2 feet or less. 
.wednesday...north winds 5 to 10 knots becoming light and
variable. waves 1 foot or less. 
.wednesday night...light and variable winds. waves 1 foot or
less. 
.thursday...southeast winds 10 knots or less becoming southwest
10 to 15 knots. rain showers likely thursday night. waves 2 feet
or less. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers likely during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday...northwest winds around 10 knots becoming west. waves
1 to 2 feet. 

$$

fzus61 kbuf 180902
glflo 
expires:202511181600;;609820

open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue nov 18 2025

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 28.8 inch low over labrador today will continue to 
move northeast into the north atlantic through wednesday. a 30.2 
inch high centered over the upper great lakes today will build to 
the lower great lakes wednesday and to new england thursday. a cold 
front will then move east across the lower great lakes friday, 
followed by a 30.0 inch high building into the ohio valley and lower 
great lakes saturday.


loz064-065-181600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est tue nov 18 2025

.today...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 10 knots becoming northwest. waves
1 to 3 feet subsiding to 1 foot or less. 
.wednesday...north winds 10 knots or less becoming west. waves
1 foot or less. 
.wednesday night...light and variable winds. waves 1 foot or
less. 
.thursday...southeast winds 5 to 15 knots becoming south 15 to
20 knots. rain showers likely thursday night. waves 2 feet or
less building to 2 to 4 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers during the day, then a chance of rain
showers friday night. waves 3 to 6 feet subsiding to 2 to 4 feet.
.saturday...northwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus61 kbuf 180902
glflo 
expires:202511181600;;609819

open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue nov 18 2025

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 28.8 inch low over labrador today will continue to 
move northeast into the north atlantic through wednesday. a 30.2 
inch high centered over the upper great lakes today will build to 
the lower great lakes wednesday and to new england thursday. a cold 
front will then move east across the lower great lakes friday, 
followed by a 30.0 inch high building into the ohio valley and lower 
great lakes saturday.


loz063-181600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est tue nov 18 2025

.today...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tonight...west winds 10 knots or less becoming north. waves 1 to
2 feet. 
.wednesday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.wednesday night...light and variable winds. waves 1 foot or
less. 
.thursday...southeast winds 10 knots or less becoming south 10 to
15 knots. rain showers likely thursday night. waves 1 foot or
less building to 1 to 3 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest 10 to
15 knots. rain showers likely during the day, then a chance of
rain showers friday night. waves 2 to 4 feet building to 3 to
6 feet, then subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 

$$

fzus61 kcle 180817
glfle 
expires:202511181545;;608392

open lake forecast for lake erie
national weather service cleveland oh
317 am est tue nov 18 2025

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...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley today. high pressure 30.10 inches will build 
southeast over the region tonight through wednesday night before a
cold front tracks east across the great lakes late thursday into 
friday. high pressure 29.90 inches will return to the great lakes 
over the weekend.


lez162-163-181545-
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-
317 am est tue nov 18 2025

.today...northwest winds 10 knots or less becoming east. snow
with a chance of rain this morning, then rain, snow with a slight
chance of sleet this afternoon. waves 1 foot or less. 
.tonight...east winds 5 to 10 knots becoming northeast. a chance
of rain early. waves 1 foot or less. 
.wednesday...northeast winds 5 to 10 knots. waves 2 feet or less.
.wednesday night...east winds 5 to 10 knots becoming light and
variable. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming west. a chance
of rain thursday night. waves 1 foot or less. 
.friday...west winds 5 to 10 knots becoming northwest. a chance
of rain friday night. waves 1 foot or less. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 

$$

fzus61 kcle 180817
glfle 
expires:202511181545;;608393

open lake forecast for lake erie
national weather service cleveland oh
317 am est tue nov 18 2025

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...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley today. high pressure 30.10 inches will build 
southeast over the region tonight through wednesday night before a
cold front tracks east across the great lakes late thursday into 
friday. high pressure 29.90 inches will return to the great lakes 
over the weekend.


lez164-165-181545-
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-
317 am est tue nov 18 2025

.today...southwest winds 10 knots or less becoming southeast. a
chance of rain and snow this morning, then rain and snow early
this afternoon. a chance of rain late. waves 1 foot or less. 
.tonight...east winds 5 to 10 knots becoming northeast. a chance
of rain in the evening. waves 1 foot or less. 
.wednesday...northeast winds 5 to 10 knots. waves 1 to 2 feet. 
.wednesday night...east winds 5 to 10 knots becoming light and
variable. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming southwest 10 to
15 knots. rain likely thursday night. waves 2 feet or less. 
.friday...west winds 5 to 15 knots becoming north. a chance of
rain. waves 1 to 2 feet. 
.saturday...northwest winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 

$$

fzus61 kcle 180817
glfle 
expires:202511181545;;608394

open lake forecast for lake erie
national weather service cleveland oh
317 am est tue nov 18 2025

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...
low pressure 29.90 inches will weaken as it moves east into the 
ohio valley today. high pressure 30.10 inches will build 
southeast over the region tonight through wednesday night before a
cold front tracks east across the great lakes late thursday into 
friday. high pressure 29.90 inches will return to the great lakes 
over the weekend.


lez061-166>169-181545-
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-
317 am est tue nov 18 2025

.today...west winds 10 knots or less becoming south. a slight
chance of rain and snow early, then a chance of rain and snow. a
chance of rain late. waves 2 feet or less. 
.tonight...southeast winds 10 knots or less becoming northeast. a
chance of rain in the evening, then a slight chance of rain after
midnight. waves 1 foot or less. 
.wednesday...northeast winds 5 to 10 knots. waves 2 feet or less.
.wednesday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming southwest 10 to
15 knots. rain likely thursday night. waves 1 foot or less
building to 1 to 3 feet. 
.friday...west winds 10 to 15 knots becoming northwest. a chance
of rain during the day. waves 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 

$$

fzus63 kdtx 180810
glfsc 
expires:202511181615;;608190

lake st clair forecast
national weather service detroit/pontiac mi
310 am est tue nov 18 2025

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...low pressure, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lcz460-181615-
lake st clair-
310 am est tue nov 18 2025

.today...light and variable winds. mostly cloudy. a chance of light
snow in the morning...then a chance of light rain and snow in the
afternoon. waves nearly calm.
.tonight...northeast winds 5 to 10 knots. mostly cloudy with a
chance of light rain until early morning...then mostly clear early
in the morning. waves 2 feet or less.
.wednesday...northeast winds 5 to 10 knots until late afternoon
becoming light and variable. partly sunny. waves 2 feet or less.
.wednesday night...light and variable winds. mostly cloudy early in
the evening becoming partly cloudy. waves 2 feet or less.
.thursday...light and variable winds becoming south 5 to 10 knots in
the afternoon and evening. mostly cloudy. a chance of light rain in
the evening. waves 2 feet or less.
.friday...northwest winds 10 to 15 knots. partly cloudy. a chance of
light rain. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots. mostly clear. waves 2
feet or less.

$$

fzus63 kdtx 180809
glflh 
expires:202511181615;;607889

open lake forecast for lake huron
national weather service detroit/pontiac mi
309 am est tue nov 18 2025

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...low pressure, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lhz361-362-181615-
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-
309 am est tue nov 18 2025

.today...northwest winds 5 to 10 knots in the morning becoming
light and variable. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon. 
.tonight...northwest winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds becoming southwest
5 to 10 knots in the late evening and overnight. waves 2 feet or
less. 
.thursday...south winds 5 to 10 knots becoming southwest 15 to
20 knots. a chance of rain late in the morning. rain likely late
in the afternoon. waves 2 feet or less building to 2 to 4 feet. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots in the late evening and early morning. waves 4 to
6 feet. waves occasionally around 8 feet. 
.saturday...west winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and early morning. waves 2 to 4 feet
subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 180809
glflh 
expires:202511181615;;607890

open lake forecast for lake huron
national weather service detroit/pontiac mi
309 am est tue nov 18 2025

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...low pressure, 29.90 inches, will track across the ohio
valley today while high pressure of 30.20 inches holds across the
northern great lakes. this high will sustain dry conditions and
light winds across lake huron. the high will expand south across
lower michigan on wednesday and drift east of the region by
thursday. deepening low pressure over northern ontario thursday
will drive a weak cold front across the region thursday night.


lhz363-462>464-181615-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
309 am est tue nov 18 2025

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


$$

fzus63 kmkx 180854
glflm 
expires:202511181645;;609304

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
254 am cst tue nov 18 2025

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...

low pressure of 29.7 inches over northwestern missouri will 
continue to move east early this morning. east winds will slowly 
increase through this morning. the breezy winds will become northeasterly
over the southern half of the lake as the low moves into the ohio
river valley this evening. winds then ease wednesday as high 
pressure of 30.3 inches moves over the lake. high pressure exits 
into thursday morning, with winds becoming southwesterly as a low 
pressure system progresses eastward across northern ontario. a 
cold front from that low pressure system will shift winds to 
northwesterly overnight thursday into friday.


lmz261-362-364-366-563-565-567-868-181645-
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-
254 am cst tue nov 18 2025

sheboygan wi to pentwater mi north...

.today...northeast winds 10 to 15 kt. chance of rain this
morning, then slight chance of rain this afternoon. waves 1 to
3 ft. 
.tonight...northeast winds 5 to 10 kt becoming north. waves 1 to
2 ft. 
.wednesday...southwest winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 ft or less. 
.wednesday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt. chance of rain in the
morning, then rain likely in the afternoon. waves 2 to 4 ft. 
.thursday night...west winds 15 to 25 kt becoming northwest 10 to
20 kt. waves 2 to 4 ft. 
.friday...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 180854
glflm 
expires:202511181645;;609305

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
254 am cst tue nov 18 2025

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...

low pressure of 29.7 inches over northwestern missouri will 
continue to move east early this morning. east winds will slowly 
increase through this morning. the breezy winds will become northeasterly
over the southern half of the lake as the low moves into the ohio
river valley this evening. winds then ease wednesday as high 
pressure of 30.3 inches moves over the lake. high pressure exits 
into thursday morning, with winds becoming southwesterly as a low 
pressure system progresses eastward across northern ontario. a 
cold front from that low pressure system will shift winds to 
northwesterly overnight thursday into friday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-181645-
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-
254 am cst tue nov 18 2025

sheboygan wi to pentwater mi south...

.today...east winds 10 to 20 kt. rain and slight chance of snow
this morning, then chance of rain this afternoon. waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft. 
.tonight...east winds 10 to 20 kt diminishing to 10 to 15 kt.
slight chance of rain in the evening. waves 3 to 5 ft subsiding
to 2 to 4 ft. 
.wednesday...east winds 10 to 15 kt becoming southeast 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday night...south winds 5 to 10 kt becoming southwest.
waves 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt. chance of rain in the
afternoon. waves 2 to 4 ft. 
.thursday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft building to 3 to 5 ft. 
.friday...northwest winds 10 to 20 kt becoming north. waves 4 to
6 ft occasionally to 8 ft. 
.saturday...northeast winds 10 to 15 kt veering to southwest
10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609744

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz265-182100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am est tue nov 18 2025

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots. a chance of
rain showers. waves calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. rain showers. waves building to 2 to
4 feet. 
.thursday night...west winds 20 to 30 knots. a chance of rain
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609745

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz266-182100-
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 am est tue nov 18 2025

.early this morning...north winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots. waves calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of rain showers after
midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday night...northwest winds 20 to 30 knots. rain showers
likely in the evening, then a chance of rain showers after
midnight. waves building to 5 to 8 feet occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. a chance
of rain showers. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609746

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz267-182100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am est tue nov 18 2025

.early this morning...north winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...north winds 10 to 20 knots becoming northwest 5 to
15 knots by late morning, then increasing to 10 to 20 knots by
mid afternoon. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots backing west late.
waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots backing southwest. waves
calm to 2 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of rain showers after
midnight. waves building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday night...west winds 20 to 30 knots veering northwest
after midnight. rain showers in the evening, then a chance of
rain showers after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of snow showers. waves subsiding to 1 to
3 feet. 
.saturday...west winds 10 to 20 knots backing southwest. a chance
of rain showers. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609741

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz162-182100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est tue nov 18 2025 /301 am cst tue nov 18 2025/

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...east winds 5 to 15 knots diminishing to less than
10 knots by mid afternoon. waves calm to 2 feet. 
.tonight...southwest winds less than 10 knots increasing to 5 to
15 knots by midnight. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday night...southwest winds 10 to 20 knots. a chance of
rain showers in the evening, then rain showers likely after
midnight. waves building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. rain showers likely in the morning.
waves 1 to 3 feet. 
.thursday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609742

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz263-182100-
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 am est tue nov 18 2025

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northeast winds less than 10 knots backing northwest by
mid afternoon. waves calm to 2 feet. 
.tonight...west winds less than 10 knots increasing to 5 to
15 knots by midnight, then backing southwest late. waves calm to
2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 15 to 25 knots. a chance of
rain showers. waves building to 2 to 4 feet. 
.thursday...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. rain showers likely in the morning,
then a chance of rain showers in the afternoon. waves building to
3 to 6 feet occasionally to 8 feet. 
.thursday night...west winds 15 to 25 knots. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
building to 1 to 3 feet. 

$$

fzus63 kmqt 180901
glfls 
expires:202511182100;;609743

open lake forecast for lake superior
national weather service marquette mi
401 am est tue nov 18 2025

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...

high pressure averaging 30.1 inches persists over lake superior 
today as a 28.8 inch low retrogrades back into far northern quebec. 
30.2 inch ridging continues to encompass the great lakes basin 
wednesday, shifting into new england wednesday night and thursday as 
a 29.7 inch low develops over northern ontario. high pressure 
ridging of around 30.1 inches develops over the northern plains and 
upper midwest on friday before moving into the great lakes region by 
saturday.



lsz264-182100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am est tue nov 18 2025

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots backing northwest. waves
calm to 2 feet. 
.tonight...northwest winds less than 10 knots becoming west 5 to
15 knots by midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of rain showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. rain showers in the morning, then a
chance of rain showers in the afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots veering west. waves
building to 2 to 4 feet. 

$$