fzus61 kbuf 300820
glflo 
expires:202604301515;;772844

open lake forecast for lake ontario
national weather service buffalo ny
420 am edt thu apr 30 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...an elongated 29.9 inch low will move quebec today while 
a 29.6 inch low develops and tracks northeast off the mid-atlantic 
and new england coastlines. this second low will then retrograde 
northward and then northwestward across the canadian maritimes and 
quebec respectively friday and saturday. a 29.5 inch low will then 
track from the southeastern states northeastward into the western 
atlantic saturday through sunday, while a 29.8 inch high ridges 
across the lower great lakes.


loz063>065-301515-
lake ontario open waters from hamlin beach to the saint lawrence
river-
420 am edt thu apr 30 2026

.today...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.friday night...west winds 5 to 10 knots. waves 1 to 2 feet. 
.saturday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...south winds 15 to 20 knots becoming southwest. showers
likely. waves 2 to 4 feet building to 3 to 5 feet. 

$$

fzus61 kbuf 300820
glflo 
expires:202604301515;;772843

open lake forecast for lake ontario
national weather service buffalo ny
420 am edt thu apr 30 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...an elongated 29.9 inch low will move quebec today while 
a 29.6 inch low develops and tracks northeast off the mid-atlantic 
and new england coastlines. this second low will then retrograde 
northward and then northwestward across the canadian maritimes and 
quebec respectively friday and saturday. a 29.5 inch low will then 
track from the southeastern states northeastward into the western 
atlantic saturday through sunday, while a 29.8 inch high ridges 
across the lower great lakes.


loz062-301515-
lake ontario open waters from the niagara river to hamlin beach-
420 am edt thu apr 30 2026

.today...northwest winds 10 to 15 knots becoming west. waves 1 to
3 feet. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
1 to 2 feet. 
.friday...west winds 5 to 10 knots. waves 1 foot or less. 
.friday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.saturday...west winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
2 feet building to 3 to 5 feet. 
.monday...southwest winds 15 to 25 knots. a chance of showers.
waves 3 to 6 feet. 

$$

fzus61 kcle 300735
glfle 
expires:202604301415;;771045

open lake forecast for lake erie
national weather service cleveland oh
335 am edt thu apr 30 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 30.00 inches will linger over the lake through
the end of the week. high pressure 30.10 inches will build into 
the region on saturday with low pressure 29.80 inches moving 
through the region on monday.


lez061-167>169-301415-
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-
335 am edt thu apr 30 2026

.today...northwest winds 10 to 15 knots becoming west. a slight
chance of showers early. waves 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming northwest less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.friday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.friday night...west winds 5 to 10 knots becoming northwest.
waves around 1 foot. 
.saturday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots. a chance of showers.
waves 2 to 4 feet. 

$$

fzus61 kcle 300735
glfle 
expires:202604301415;;771043

open lake forecast for lake erie
national weather service cleveland oh
335 am edt thu apr 30 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 30.00 inches will linger over the lake through
the end of the week. high pressure 30.10 inches will build into 
the region on saturday with low pressure 29.80 inches moving 
through the region on monday.


lez162-163-301415-
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-
335 am edt thu apr 30 2026

.today...north winds 10 to 15 knots becoming northwest. a slight
chance of showers early. waves 1 to 2 feet. 
.tonight...northwest winds 5 to 10 knots. a chance of showers
after midnight. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots. waves 1 foot or less. 
.friday night...northwest winds around 10 knots becoming north.
waves 1 to 2 feet. 
.saturday...northwest winds 5 to 10 knots. waves 1 to 2 feet. 
.sunday...west winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers sunday night.
waves 1 to 3 feet. 
.monday...southwest winds 15 to 25 knots becoming west. a chance
of showers. waves 1 to 3 feet. 

$$

fzus61 kcle 300735
glfle 
expires:202604301415;;771044

open lake forecast for lake erie
national weather service cleveland oh
335 am edt thu apr 30 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 30.00 inches will linger over the lake through
the end of the week. high pressure 30.10 inches will build into 
the region on saturday with low pressure 29.80 inches moving 
through the region on monday.


lez164>166-301415-
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-
335 am edt thu apr 30 2026

.today...north winds 10 to 15 knots becoming west. a slight
chance of showers early. waves 1 to 3 feet. 
.tonight...west winds 5 to 10 knots becoming north. a slight
chance of showers late. waves 2 feet or less. 
.friday...southeast winds 5 to 10 knots becoming northwest. a
chance of showers. waves around 1 foot. 
.friday night...northwest winds 5 to 10 knots becoming north.
waves 1 to 2 feet. 
.saturday...north winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers sunday night. waves 1 to 3 feet
building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots. a chance of showers.
waves 2 to 4 feet. 

$$

fzus63 kdtx 300750
glflh 
expires:202604301600;;771416

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 am edt thu apr 30 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...a diffuse low pressure system, 30.00, will very
gradually move across the great lakes through the late week
period. this will bring periods of isolated rain showers and will
generally maintain lighter northwest flow.


lhz363-462>464-301600-
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-
350 am edt thu apr 30 2026

.today...northwest winds 10 to 15 knots becoming north 5 to
10 knots in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet late in the afternoon. 
.tonight...north winds 5 to 10 knots early in the evening
becoming light and variable...then becoming northwest 5 to
10 knots early in the morning. waves 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...north winds 5 to 10 knots becoming northwest
10 to 15 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet after midnight. 
.saturday...northwest winds 10 to 15 knots becoming north 5 to
10 knots late in the morning...then backing to the southwest late
in the evening. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming southwest 10 to
15 knots. a chance of showers by midnight. waves 1 to 3 feet
building to 3 to 5 feet. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 3 to 5 feet. 


$$

fzus63 kdtx 300750
glflh 
expires:202604301600;;771415

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 am edt thu apr 30 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...a diffuse low pressure system, 30.00, will very
gradually move across the great lakes through the late week
period. this will bring periods of isolated rain showers and will
generally maintain lighter northwest flow.


lhz361-362-301600-
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-
350 am edt thu apr 30 2026

.today...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.tonight...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.friday night...northwest winds 10 to 15 knots. waves 2 to
4 feet. 
.saturday...northwest winds 10 to 15 knots becoming west 5 to
10 knots late in the evening. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.sunday...west winds 5 to 10 knots becoming south 10 to 15 knots.
a chance of showers by midnight. waves 1 to 3 feet building to
2 to 4 feet. 
.monday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers early in the morning. a chance of
showers. waves 3 to 5 feet. 


$$

fzus63 kdtx 300750
glfsc 
expires:202604301600;;771418

lake st clair forecast
national weather service detroit/pontiac mi
350 am edt thu apr 30 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...a diffuse low pressure system, 30.00, will very
gradually move across the great lakes through the late week
period. this will bring periods of isolated showers and will
generally maintain lighter northwest flow.


lcz460-301600-
lake st clair-
350 am edt thu apr 30 2026

.today...northwest winds 10 to 15 knots diminishing to 5 to 10 knots
late in the afternoon. mostly cloudy. waves 2 feet or less.
.tonight...northwest winds 5 to 10 knots veering to the northeast
after midnight. partly cloudy. waves 2 feet or less.
.friday...north winds 5 to 10 knots. partly sunny. a chance of light
showers early in the afternoon. waves 2 feet or less.
.friday night...north winds 5 to 10 knots. mostly cloudy early in
the evening becoming partly cloudy. a chance of light showers early
in the evening. waves 2 feet or less.
.saturday...north winds 5 to 10 knots. mostly sunny in the morning
becoming partly cloudy. waves 2 feet or less.
.sunday...southwest winds 15 to 20 knots. partly cloudy. a chance of
light showers. waves 2 feet or less.
.monday...southwest winds 15 to 20 knots. partly cloudy. a chance of
light showers. waves 1 to 3 feet.

$$

fzus63 kmkx 300800
glflm 
expires:202604301515;;771611

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt thu apr 30 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...

north-northwest winds will continue through the end of the week 
as 29.6 inch low pressure shifts into the canadian maritimes and 
30.2 inch high pressure builds into the northern great plains. 
winds will shift south-southwesterly saturday into sunday as the 
high pressure moves into the ohio river valley and 29.5 inch low 
pressure forms over the hudson bay. winds will briefly veer 
westerly sunday night into monday as a weak cold front crosses 
lake michigan. showers and a few thunderstorms will accompany the 
front, with severe weather not anticipated at this time.

low pressure near 29.3 inches will develop near lake superior  
monday, lifting toward the southern hudson bay and quebec on 
tuesday. progression of the low will bring west-southwesterly
winds monday night through wednesday. a cold front is forecast to
cross the open waters wednesday afternoon, bringing a northwest 
wind shift.


lmz261-362-364-366-563-565-567-868-301515-
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-
300 am cdt thu apr 30 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. slight chance of rain showers. waves 1 to 2 ft.
.tonight...west winds 10 to 20 kt veering to north 10 to 15 kt.
slight chance of rain showers in the evening. waves 1 to 3 ft. 
.friday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 2 ft. 
.saturday...northwest winds 10 to 20 kt backing to southwest.
waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.monday...southwest winds 15 to 25 kt increasing to 30 kt. chance
of rain showers. waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.  

$$

fzus63 kmkx 300800
glflm 
expires:202604301515;;771612

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt thu apr 30 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...

north-northwest winds will continue through the end of the week 
as 29.6 inch low pressure shifts into the canadian maritimes and 
30.2 inch high pressure builds into the northern great plains. 
winds will shift south-southwesterly saturday into sunday as the 
high pressure moves into the ohio river valley and 29.5 inch low 
pressure forms over the hudson bay. winds will briefly veer 
westerly sunday night into monday as a weak cold front crosses 
lake michigan. showers and a few thunderstorms will accompany the 
front, with severe weather not anticipated at this time.

low pressure near 29.3 inches will develop near lake superior  
monday, lifting toward the southern hudson bay and quebec on 
tuesday. progression of the low will bring west-southwesterly
winds monday night through wednesday. a cold front is forecast to
cross the open waters wednesday afternoon, bringing a northwest 
wind shift.


lmz080-669-671-673-675-777-779-870-872-874-876-878-301515-
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-
300 am cdt thu apr 30 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 5 to 10 kt veering to southeast 10 to
15 kt. slight chance of rain showers this afternoon. waves 1 to
2 ft. 
.tonight...south winds 5 to 10 kt veering to north. slight chance
of rain showers in the evening. waves 1 ft or less building to
1 to 3 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.saturday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft.  

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771657

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt thu apr 30 2026

.early this morning...north winds 5 to 15 knots. isolated snow
showers. waves calm to 2 feet. 
.today...north winds 5 to 15 knots backing northwest late.
isolated snow showers. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a slight chance of rain and snow showers through
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west late. waves calm
to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots veering west. rain
showers likely. waves building to 1 to 3 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771658

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt thu apr 30 2026

.early this morning...north winds 5 to 15 knots. waves calm to
2 feet. 
.today...north winds 10 to 20 knots. isolated snow showers. waves
calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north late. a
slight chance of snow showers through midnight. waves calm to
2 feet. 
.friday...north winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.saturday...northwest winds 10 to 20 knots backing southeast by
mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots veering west. a chance
of rain showers. waves calm to 2 feet. 
.monday...northwest winds 15 to 25 knots backing west. a chance
of rain showers. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771655

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu apr 30 2026 /301 am cdt thu apr 30 2026/

.early this morning...north winds 5 to 15 knots. scattered snow
showers, possibly mixed with rain. waves calm to 2 feet. 
.today...north winds 5 to 15 knots backing southwest late.
scattered snow showers, possibly mixed with rain. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight,
then veering northeast late. a slight chance of rain and snow
showers through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of rain showers. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots. a chance of rain
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771660

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt thu apr 30 2026

.early this morning...north winds 10 to 20 knots. waves calm to
2 feet. 
.today...north winds 10 to 20 knots backing northwest in the
afternoon. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest in the
afternoon, then increasing to 15 to 25 knots late. waves building
to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves building to 2 to 4 feet, then
subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering west. a chance of
rain showers. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots becoming northwest 15 to
25 knots. rain showers likely, then a chance of rain showers.
waves building to 2 to 4 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771659

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz266-302000-
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 edt thu apr 30 2026

.early this morning...north winds 10 to 20 knots. waves calm to
2 feet. 
.today...north winds 10 to 20 knots backing northwest late.
isolated snow showers. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves building to 1 to 3 feet. 
.friday...north winds 10 to 20 knots backing northwest late.
waves 1 to 3 feet. 
.friday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering west. rain showers
likely. waves building to 1 to 3 feet. 
.monday...northwest winds 15 to 25 knots. a chance of rain
showers. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771656

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz263-302000-
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 edt thu apr 30 2026

.early this morning...north winds 5 to 15 knots. isolated rain
and snow showers. waves calm to 2 feet. 
.today...north winds 5 to 15 knots becoming west less than
10 knots late. scattered snow showers, possibly mixed with rain.
waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a chance of snow showers, possibly mixed with rain
through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. a chance of rain showers.
waves building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$