fzus61 kbuf 132002
glflo 
expires:202605140300;;506749

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt wed may 13 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 29.6 inch low north of lake ontario this evening 
will weaken into a trough as it slowly drifts over eastern new york 
and new england through thursday. a 30.0 inch high will then build 
from the central great lakes and ohio valley thursday night to the 
lower great lakes and mid atlantic friday, then off the carolina 
coast saturday. a 29.3 inch low over the central plains will then 
push its' warm front into the lower great lakes region sunday and 
sunday night. another low averaging 29.5 inches may move from the 
central great lakes to james bay monday through monday night.


loz063>065-140300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt wed may 13 2026

.tonight...west winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers early. waves 3 to 5 feet subsiding
to 2 to 4 feet. 
.thursday...southwest winds 10 knots or less becoming northwest.
waves 1 to 3 feet subsiding to 1 foot or less. 
.thursday night...northwest winds 5 to 15 knots. a chance of
showers. waves 2 feet or less. 
.friday...northwest winds 5 to 15 knots becoming west. a chance
of showers in the morning. waves 2 feet or less. 
.friday night...southwest winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.saturday...south winds 10 to 15 knots becoming southwest. a
chance of showers saturday night. waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming east. a chance of
showers during the day. waves 2 feet or less. 
.monday...east winds 5 to 15 knots becoming south 15 to 20 knots.
waves 1 foot or less building to 1 to 3 feet. 

$$

fzus61 kbuf 132002
glflo 
expires:202605140300;;506748

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt wed may 13 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 29.6 inch low north of lake ontario this evening 
will weaken into a trough as it slowly drifts over eastern new york 
and new england through thursday. a 30.0 inch high will then build 
from the central great lakes and ohio valley thursday night to the 
lower great lakes and mid atlantic friday, then off the carolina 
coast saturday. a 29.3 inch low over the central plains will then 
push its' warm front into the lower great lakes region sunday and 
sunday night. another low averaging 29.5 inches may move from the 
central great lakes to james bay monday through monday night.


loz062-140300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt wed may 13 2026

.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers late. waves 3 to 5 feet subsiding
to 2 to 4 feet. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 1 to 3 feet. 
.thursday night...northwest winds 5 to 10 knots. a chance of
showers in the evening. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming southwest. waves
1 to 2 feet. 
.friday night...southwest winds 10 to 15 knots. waves 1 to
2 feet. 
.saturday...southwest winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. a chance of showers saturday night.
waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
2 feet. 
.sunday...west winds 10 knots or less becoming east. a chance of
showers during the day. waves 1 foot or less. 
.monday...east winds 5 to 15 knots becoming southwest. waves 1 to
2 feet. 

$$

fzus61 kcle 131938
glfle 
expires:202605140215;;506050

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt wed may 13 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 averaging 29.90 inches will remain across the lake 
tonight through thursday. high pressure 30.10 inches will build 
across the region thursday night into friday. this high will move 
east friday night to allow a warm front to lift across the lake 
friday night into saturday.


lez061-168-169-140215-
ripley to buffalo ny extending from 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-
338 pm edt wed may 13 2026

.tonight...west winds 10 to 15 knots increasing to 15 to
25 knots. a slight chance of showers late this evening. a chance
of showers after midnight. waves 3 to 5 feet subsiding to 2 to
4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
15 knots. a chance of showers in the morning, then a slight
chance of showers in the afternoon. waves 2 to 4 feet. 
.thursday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.friday night...southwest winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms during the day, then a chance
of showers saturday night. waves 1 to 2 feet. 
.sunday...southwest winds 10 knots or less becoming southeast. a
chance of showers during the day. waves 1 foot or less. 
.monday...south winds 5 to 15 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131938
glfle 
expires:202605140215;;506048

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt wed may 13 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 averaging 29.90 inches will remain across the lake 
tonight through thursday. high pressure 30.10 inches will build 
across the region thursday night into friday. this high will move 
east friday night to allow a warm front to lift across the lake 
friday night into saturday.


lez162>164-140215-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
338 pm edt wed may 13 2026

.tonight...northwest winds 15 to 25 knots. a slight chance of
showers after midnight. waves 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.thursday night...north winds 10 knots or less becoming south.
waves 2 feet or less. 
.friday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.friday night...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of thunderstorms during the day, then showers likely
saturday night. waves 2 feet or less. 
.sunday...west winds 5 to 15 knots becoming southeast. a chance
of showers and thunderstorms during the day. waves 2 feet or
less. 
.monday...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131938
glfle 
expires:202605140215;;506049

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt wed may 13 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 averaging 29.90 inches will remain across the lake 
tonight through thursday. high pressure 30.10 inches will build 
across the region thursday night into friday. this high will move 
east friday night to allow a warm front to lift across the lake 
friday night into saturday.


lez165>167-140215-
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-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
338 pm edt wed may 13 2026

.tonight...northwest winds 15 to 25 knots. a slight chance of
showers this evening, then a chance of showers after midnight.
waves 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
15 knots. a slight chance of showers early. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.thursday night...northwest winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.friday night...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms during the day, then a chance
of showers saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming southeast. waves
1 foot or less. 
.monday...south winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 131952
glfsc 
expires:202605140400;;506263

lake st clair forecast
national weather service detroit/pontiac mi
352 pm edt wed may 13 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...low pressure of 29.60 inches is now over georgian bay,
producing gusty west winds of 25 to 30 knots. much lighter winds 
for thursday as high pressure arrives.


lcz460-140400-
lake st clair-
352 pm edt wed may 13 2026

...small craft advisory in effect until 10 pm edt this evening...

.tonight...northwest winds 15 to 20 knots. mostly cloudy becoming
partly cloudy. waves 1 to 3 feet.
.thursday...northwest winds 15 to 20 knots becoming north 10 to 15
knots late in the afternoon. mostly sunny. waves 1 to 3 feet.
.thursday night...north winds 10 to 15 knots becoming northeast 5 to
10 knots by midnight...then becoming light and variable after
midnight. mostly clear. waves 2 feet or less.
.friday...light and variable winds becoming south 10 to 15 knots.
partly sunny. waves 2 feet or less.
.friday night...south winds 10 to 15 knots. partly cloudy. waves 2
feet or less.
.saturday...southwest winds 10 to 15 knots. partly sunny...then
partly cloudy with a chance of showers in the evening. waves 2 feet
or less.
.sunday...southeast winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.monday...south winds 20 to 25 knots. partly cloudy. waves 1 to 3
feet.

$$

fzus63 kdtx 131951
glflh 
expires:202605140400;;506260

open lake forecast for lake huron
national weather service detroit/pontiac mi
351 pm edt wed may 13 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...low pressure of 29.60 inches is now over georgian bay,
producing gusty west winds of 25 to 30 knots. much lighter winds 
for thursday as high pressure arrives.


lhz361-362-140400-
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-
351 pm edt wed may 13 2026

.tonight...northwest winds 15 to 20 knots. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.thursday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and afternoon. waves 3 to 5 feet. 
.thursday night...west winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 to 4 feet subsiding to
2 feet or less in the late evening and overnight. 
.friday...south winds 5 to 10 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet in the late
morning and afternoon. 
.friday night...south winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.saturday...south winds 15 to 20 knots becoming west 10 to
15 knots late in the afternoon...then becoming northwest 5 to
10 knots late in the evening. waves 4 to 6 feet. 
.sunday...northwest winds 5 to 10 knots veering to the north in
the late morning and early afternoon...then veering to the east
early in the evening increasing to 15 to 20 knots by midnight. a
chance of showers by midnight. waves 2 to 4 feet building to 4 to
6 feet . waves occasionally around 8 feet. 
.monday...southeast winds 15 to 20 knots increasing to 20 to
25 knots early in the evening...then becoming south 15 to
20 knots by midnight. a chance of showers early in the morning. a
chance of showers . waves 5 to 7 feet. waves occasionally around
10 feet. 


$$

fzus63 kdtx 131951
glflh 
expires:202605140400;;506261

open lake forecast for lake huron
national weather service detroit/pontiac mi
351 pm edt wed may 13 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...low pressure of 29.60 inches is now over georgian bay,
producing gusty west winds of 25 to 30 knots. much lighter winds 
for thursday as high pressure arrives.


lhz363-462>464-140400-
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-
351 pm edt wed may 13 2026

.tonight...northwest winds 15 to 20 knots. gusts to 30 knots in
the evening. waves 6 to 9 feet. waves occasionally around
12 feet. 
.thursday...north winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.thursday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 3 to 5 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.friday...light and variable winds becoming south 5 to 10 knots
in the late morning and early afternoon...then increasing to
10 to 15 knots early in the afternoon. waves 1 to 3 feet building
to 2 to 4 feet early in the afternoon. 
.friday night...south winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots. waves 3 to 5 feet. 
.sunday...north winds 5 to 10 knots becoming northeast 10 to
15 knots by midnight. a chance of showers by midnight. waves 1 to
3 feet building to 2 to 4 feet by midnight. 
.monday...southeast winds 15 to 20 knots veering to the south . a
chance of showers early in the morning. a chance of showers by
midnight. waves 4 to 6 feet. waves occasionally around 8 feet. 


$$

fzus63 kmkx 132003
glflm 
expires:202605140315;;506761

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 pm cdt wed may 13 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...

gusty northwest winds will continue this afternoon, as low 
pressure around 29.6 inches over southeast ontario moves east of
the region. a few gale force gusts may occur, particularly 
across northern and eastern portions of the lake. lighter winds 
are then expected tonight into thursday, as high pressure 
around 30.1 inches moves eastward through the region. breezy 
southerly winds are expected to develop friday, with a few gales
possible friday afternoon and evening in northern portions of 
the lake. south to southwest winds then linger friday night into
saturday. winds should then increase gradually for sunday, as a
warm front moves northward into the region, ahead of low 
pressure around 29.2 inches in the central plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-140315-
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-
303 pm cdt wed may 13 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...southeast winds 5 to 10 kt becoming south 10 to
20 kt. chance of rain showers overnight. waves 1 to 2 ft building
to 1 to 3 ft. 
.friday...south winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft building to 7 to 10 ft occasionally to 13 ft. 
.friday night...south winds to 30 kt becoming southwest 10 to
20 kt overnight. waves 7 to 10 ft occasionally to 13 ft subsiding
to 4 to 7 ft occasionally to 9 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
3 to 5 ft subsiding to 1 to 3 ft. 
.saturday night...south winds 5 to 10 kt backing to east 10 to
15 kt. chance of rain showers. waves 1 to 3 ft. 
.sunday...east winds 10 to 20 kt. chance of rain showers. waves
2 to 4 ft. 
.monday...south winds to 30 kt. chance of showers. waves 7 to
10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 132003
glflm 
expires:202605140315;;506760

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 pm cdt wed may 13 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...

gusty northwest winds will continue this afternoon, as low 
pressure around 29.6 inches over southeast ontario moves east of
the region. a few gale force gusts may occur, particularly 
across northern and eastern portions of the lake. lighter winds 
are then expected tonight into thursday, as high pressure 
around 30.1 inches moves eastward through the region. breezy 
southerly winds are expected to develop friday, with a few gales
possible friday afternoon and evening in northern portions of 
the lake. south to southwest winds then linger friday night into
saturday. winds should then increase gradually for sunday, as a
warm front moves northward into the region, ahead of low 
pressure around 29.2 inches in the central plains.


lmz261-362-364-366-563-565-567-868-140315-
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-
303 pm cdt wed may 13 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft. 
.thursday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt increasing to gales to 35 kt.
waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.friday night...south gales to 35 kt becoming southwest to 30 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.saturday...southwest winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.saturday night...north winds 10 to 20 kt becoming northeast
10 to 15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...northeast winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...south winds to 30 kt. chance of showers. waves 7 to
10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506693

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz266-140800-
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 wed may 13 2026

.late this afternoon...northwest winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
waves subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots veering southeast in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.thursday night...southeast winds 15 to 25 knots veering south
after midnight, then increasing to 20 to 30 knots late. a chance
of rain showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...south winds 20 to 30 knots. rain showers likely through
early afternoon. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.saturday...west winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 10 to 20 knots becoming southeast gales to
40 knots. rain showers likely and a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...southeast gales to 45 knots becoming south 20 to
30 knots. rain showers. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506694

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz267-140800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt wed may 13 2026

.late this afternoon...northwest winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots backing northwest in the
afternoon, then becoming west less than 10 knots late. waves
subsiding to calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight, then increasing to 10 to 20 knots late. a slight
chance of rain showers after midnight. waves building to 2 to
4 feet. 
.friday...south winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers through early
afternoon. waves building to 5 to 8 feet occasionally to 10 feet.
.friday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots veering northwest by mid
afternoon. waves subsiding to 3 to 5 feet occasionally to 7 feet.
.saturday night...northwest winds 5 to 15 knots veering north
after midnight. waves subsiding to calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots becoming southeast gales
to 35 knots. a chance of rain showers. a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...southeast gales to 40 knots becoming south 15 to
25 knots. rain showers likely and a chance of thunderstorms.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506689

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed may 13 2026 /301 pm cdt wed may 13 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots veering east late. waves
calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves building to 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots becoming south 15 to
25 knots after midnight. a chance of rain showers. waves building
to 3 to 5 feet occasionally to 7 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...northeast gales to 35 knots. a chance of rain showers,
then rain showers and a chance of thunderstorms. waves building
to 8 to 11 feet occasionally to 14 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.monday...northeast winds 20 to 30 knots becoming northwest 10 to
20 knots. rain showers. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506690

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz263-140800-
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 wed may 13 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight,
then becoming east less than 10 knots late. waves calm to 2 feet.
.thursday...east winds less than 10 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.thursday night...southeast winds 15 to 25 knots veering south
after midnight. a chance of rain showers through midnight, then
rain showers likely after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday...south winds 15 to 25 knots becoming southwest 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday night...southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.saturday night...northeast winds 5 to 15 knots veering east
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 20 to 30 knots increasing to gales to
35 knots. rain showers likely and a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...northeast gales to 35 knots becoming west 15 to
25 knots. rain showers and a chance of thunderstorms. waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506691

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz264-140800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt wed may 13 2026

.late this afternoon...northwest winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday...east winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. waves building to 1 to 3 feet. 
.thursday night...southeast winds 15 to 25 knots veering south
after midnight. a slight chance of rain showers through midnight,
then rain showers likely after midnight. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday...south winds 15 to 25 knots. a chance of rain showers
through early afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...southwest winds 15 to 25 knots veering west after
midnight. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 15 to 25 knots increasing to gales to
40 knots. rain showers likely and a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...east gales to 40 knots becoming northwest 15 to
25 knots. rain showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 132002
glfls 
expires:202605140800;;506692

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed may 13 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... 

30.1 inch ridging builds over lake superior tonight into thursday in 
the wake of a 29.6 inch low over southern ontario. this ridging is 
pressed southeast to the lower great lakes late thursday into friday 
while a 29.1 inch low emanates off the canadian rockies. this low is 
expected to bring troughing of 29.6 inches over lake superior friday 
and friday night as it tracks to near james bay at 29.3 inches by 
saturday morning. ridging of 30.1 inches builds over the lake from 
northern ontario saturday night into sunday, followed by another 
29.7 inch trough extending from the central plains early next week.



lsz265-140800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt wed may 13 2026

.late this afternoon...northwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 2 to 4 feet. 
.thursday night...southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. a slight chance of rain showers
through midnight, then rain showers likely after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to 3 to 5 feet occasionally to 7 feet.
.friday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet. 
.sunday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. rain showers likely and a chance of thunderstorms.
waves building to 5 to 8 feet occasionally to 10 feet. 
.monday...southeast gales to 35 knots becoming west 15 to
25 knots. rain showers. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 

$$