fzus61 kbuf 042003
glflo 
expires:202610050300;;534640

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun oct 4 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 29.7 inch low over northwest ontario will deepen to 
29.4 inches as it slides just south of james bay over central quebec 
tonight, while sending a pair of cold fronts across the lake. a 30.2 
inch high over the upper midwest will then build across the great 
lakes monday into tuesday, before sliding into the northeast 
wednesday. a cold front will then pass across the lake thursday. a 
30.1 inch surface high will then ridge north across the lake friday.


loz062-050300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sun oct 4 2026

.tonight...southwest winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. waves 1 to 2 feet building to 3 to
6 feet. 
.monday...west winds to 30 knots becoming northwest. waves 5 to
8 feet. waves occasionally around 10 feet. 
.monday night...northwest winds 15 to 25 knots diminishing to
10 to 15 knots. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots becoming northwest. waves
1 to 3 feet. 

$$

fzus61 kbuf 042003
glflo 
expires:202610050300;;534641

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun oct 4 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 29.7 inch low over northwest ontario will deepen to 
29.4 inches as it slides just south of james bay over central quebec 
tonight, while sending a pair of cold fronts across the lake. a 30.2 
inch high over the upper midwest will then build across the great 
lakes monday into tuesday, before sliding into the northeast 
wednesday. a cold front will then pass across the lake thursday. a 
30.1 inch surface high will then ridge north across the lake friday.


loz063>065-050300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun oct 4 2026

.tonight...southwest winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. a chance of showers this evening,
then showers likely after midnight. a chance of showers late.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.monday...northwest winds to 30 knots. waves 5 to 8 feet building
to 7 to 10 feet. waves occasionally around 13 feet. 
.monday night...northwest winds to 30 knots diminishing to 15 to
25 knots. waves 5 to 9 feet subsiding to 3 to 5 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 20 knots. a chance of showers. waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.friday...west winds 10 to 15 knots becoming northwest. waves
2 to 4 feet. 

$$

fzus61 kcle 041951
glfle 
expires:202610050215;;534306

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt sun oct 4 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 cold front will cross the lake today, followed by high pressure
30.20 inches through the week.


lez164-165-050215-
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-
351 pm edt sun oct 4 2026

.tonight...west winds 10 to 15 knots becoming northwest 15 to
20 knots. waves 1 to 2 feet building to 3 to 5 feet. 
.monday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.tuesday night...south winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. waves 2 feet or less building to
3 to 5 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...west winds 10 to 15 knots becoming northwest. waves
1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming east. waves 1 to
2 feet. 

$$

fzus61 kcle 041951
glfle 
expires:202610050215;;534307

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt sun oct 4 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 cold front will cross the lake today, followed by high pressure
30.20 inches through the week.


lez061-166>169-050215-
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-
351 pm edt sun oct 4 2026

.tonight...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northwest winds 15 to 20 knots. waves 2 to 4 feet. 
.monday night...northwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.tuesday...northwest winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.tuesday night...southwest winds 5 to 10 knots increasing to
15 to 25 knots. waves 1 foot or less building to 3 to 6 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
2 to 3 feet. waves occasionally around 9 feet. 
.thursday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots becoming north. waves 1 to
3 feet. 

$$

fzus61 kcle 041951
glfle 
expires:202610050215;;534305

open lake forecast for lake erie
national weather service cleveland oh
351 pm edt sun oct 4 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 cold front will cross the lake today, followed by high pressure
30.20 inches through the week.


lez162-163-050215-
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-
351 pm edt sun oct 4 2026

.tonight...west winds 10 to 15 knots becoming northwest. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.monday...northwest winds 10 to 15 knots. waves 1 to 2 feet. 
.monday night...northwest winds 5 to 10 knots. waves 1 foot or
less. 
.tuesday...west winds 5 to 10 knots becoming south. waves 1 foot
or less. 
.tuesday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet. 
.thursday...west winds 10 to 15 knots. waves 1 to 2 feet. 
.friday...southwest winds 5 to 10 knots becoming east. waves
2 feet or less. 

$$

fzus63 kdtx 041947
glfsc 
expires:202610050400;;534279

lake st clair forecast
national weather service detroit/pontiac mi
347 pm edt sun oct 4 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, 29.50 inches, south of james bay will
track into quebec tonight. this low is driving a cold front 
through the region, with west/northwest flow expected tonight into
monday. high pressure, 30.20 inches, will move into the region 
monday afternoon, bringing much lighter wind conditions. the next 
system to affect the region will be later tuesday with stronger 
southwest winds.


lcz460-050400-
lake st clair-
347 pm edt sun oct 4 2026

.tonight...west winds 10 to 15 knots becoming northwest 20 to 25
knots by midnight...then diminishing to 15 to 20 knots early in the
morning. clear. waves 1 to 3 feet.
.monday...northwest winds 15 to 20 knots diminishing to 10 to 15
knots in the late morning and afternoon. sunny. waves 2 feet or
less.
.monday night...northwest winds 5 to 10 knots veering to the
northeast after midnight. mostly clear. waves 2 feet or less.
.tuesday...light and variable winds becoming southwest 5 to 10 knots
in the late morning and early afternoon...then becoming south 10 to
15 knots early in the afternoon. sunny. waves 2 feet or less.
.tuesday night...south winds 10 to 15 knots becoming southwest 20 to
25 knots. mostly clear. waves 1 to 3 feet.
.wednesday...southwest winds 15 to 20 knots becoming west 10 to 15
knots in the afternoon and evening. mostly clear. waves 1 to 3 feet.
.thursday...west winds 10 to 15 knots. mostly clear. waves 2 feet or
less.
.friday...west winds 10 to 15 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 041947
glflh 
expires:202610050400;;534272

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sun oct 4 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, 29.50 inches, south of james bay will
track into quebec tonight. this low is driving a cold front
through the region, with west/northwest flow expected tonight
into monday. speeds will increase to around 25 knots this
evening, with gale force gusts to 35 knots still possible. high
pressure, 30.20 inches, will move into the region monday
afternoon, bringing much lighter wind conditions. the next system
to affect the region will be later tuesday with stronger
southwest winds.


lhz361-362-050400-
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-
347 pm edt sun oct 4 2026

...gale watch in effect from 8 pm edt this evening through monday
morning...

.tonight...northwest winds 20 to 25 knots with occasional gusts 
to 35 knot gales. waves 6 to 9 feet. waves occasionally around 12 
feet.
.monday...northwest winds 20 to 25 knots with gusts to 30 knots. 
waves 6 to 9 feet. waves occasionally around 12 feet. 
.monday night...northwest winds 15 to 20 knots becoming light and
variable. waves 4 to 6 feet subsiding to 1 to 3 feet after
midnight. waves occasionally around 8 feet. 
.tuesday...south winds 5 to 10 knots increasing to 15 to 20 knots
with gusts to around 30 knots. waves 1 to 3 feet building to 4 to
6 feet early in the afternoon. waves occasionally around 8 feet. 
.tuesday night...south winds 20 to 25 knots becoming southwest
15 to 20 knots in the late evening and overnight. gusts to
30 knots. a chance of rain. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.wednesday...west winds 10 to 15 knots increasing to 15 to
20 knots late in the morning...then decreasing to 10 to 15 knots
late in the afternoon. waves 3 to 5 feet. 
.thursday...west winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots . waves 2 to 4 feet. 
.friday...west winds 10 to 15 knots. waves 1 to 3 feet. 


$$

fzus63 kdtx 041947
glflh 
expires:202610050400;;534273

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sun oct 4 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, 29.50 inches, south of james bay will
track into quebec tonight. this low is driving a cold front
through the region, with west/northwest flow expected tonight
into monday. speeds will increase to around 25 knots this
evening, with gale force gusts to 35 knots still possible. high
pressure, 30.20 inches, will move into the region monday
afternoon, bringing much lighter wind conditions. the next system
to affect the region will be later tuesday with stronger
southwest winds.


lhz363-050400-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
347 pm edt sun oct 4 2026

.tonight...northwest winds 15 to 20 knots increasing to 20 to
25 knots early in the morning. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.monday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the afternoon. waves
6 to 9 feet. waves occasionally around 12 feet. 
.monday night...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 4 to 6 feet subsiding to 2 to 4 feet after
midnight. waves occasionally around 8 feet. 
.tuesday...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. 
.tuesday night...southwest winds 20 to 25 knots with gusts to
around 30 knots. waves 5 to 7 feet. waves occasionally around
10 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 5 to 7 feet subsiding to 2 to 4 feet. waves
occasionally around 10 feet. 
.thursday...west winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet . 
.friday...west winds 10 to 15 knots veering to the northwest by
midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 041947
glflh 
expires:202610050400;;534274

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sun oct 4 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, 29.50 inches, south of james bay will
track into quebec tonight. this low is driving a cold front
through the region, with west/northwest flow expected tonight
into monday. speeds will increase to around 25 knots this
evening, with gale force gusts to 35 knots still possible. high
pressure, 30.20 inches, will move into the region monday
afternoon, bringing much lighter wind conditions. the next system
to affect the region will be later tuesday with stronger
southwest winds.


lhz462>464-050400-
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-
347 pm edt sun oct 4 2026

.tonight...northwest winds 15 to 20 knots. waves 4 to 6 feet
building to 6 to 9 feet early in the morning. waves occasionally
around 12 feet. 
.monday...northwest winds 20 to 25 knots decreasing to 15 to
20 knots in the afternoon. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.monday night...northwest winds 10 to 15 knots becoming west 5 to
10 knots after midnight. waves 3 to 5 feet. 
.tuesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.tuesday night...south winds 15 to 20 knots becoming southwest
20 to 25 knots with gusts to around 30 knots in the late evening
and overnight. waves 4 to 6 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet. waves occasionally around 8 feet. 
.thursday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots. waves 1 to 3 feet. 


$$

fzus63 kmkx 041956
glflm 
expires:202610050315;;534420

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 pm cdt sun oct 4 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...

low pressure moving east across southern canada today will deepen
to 29.4 inches and approach james bay by late this afternoon. a 
cold front has exited to the east of lake michigan and northwest 
winds will remain breezy today. northwest winds will gradually 
decrease tonight into monday as high pressure of 30.2 inches 
enters from the west. a few waterspouts remain possible across the
far northern edge of the lake this evening into tonight.

low pressure of 29.4 inches will build toward the hudson bay 
tuesday through thursday. ahead of this low, south southwest 
winds will increase tuesday afternoon through wednesday and 
become gusty. there remains a risk for gusts to approach gales, 
particularly over the northern half of the open waters, and will
continue to be monitored for possible headlines. the low will 
pull a cold front across the waters wednesday night into 
thursday, delivering scattered showers and shifting winds to 
the west northwest.


lmz080-669-671-673-675-777-779-870-872-874-876-878-050315-
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-
256 pm cdt sun oct 4 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. waves 4 to
6 ft occasionally to 8 ft. 
.monday...north winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.monday night...north winds 5 to 10 kt veering to southeast late
in the evening, then becoming south 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 3 ft building to 2 to
4 ft. 
.tuesday...south winds to 30 kt increasing to gales to 35 kt.
waves 6 to 9 ft occasionally to 12 ft building to 8 to 12 ft
occasionally to 16 ft. 
.tuesday night...southwest gales to 35 kt becoming west 15 to
25 kt overnight. waves 8 to 12 ft occasionally to 16 ft subsiding
to 5 to 8 ft occasionally to 10 ft. 
.wednesday...west winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft building to 3 to 5 ft. 
.thursday...northwest winds 10 to 20 kt becoming west. waves 3 to
5 ft. 
.friday...southwest winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 041956
glflm 
expires:202610050315;;534419

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 pm cdt sun oct 4 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...

low pressure moving east across southern canada today will deepen
to 29.4 inches and approach james bay by late this afternoon. a 
cold front has exited to the east of lake michigan and northwest 
winds will remain breezy today. northwest winds will gradually 
decrease tonight into monday as high pressure of 30.2 inches 
enters from the west. a few waterspouts remain possible across the
far northern edge of the lake this evening into tonight.

low pressure of 29.4 inches will build toward the hudson bay 
tuesday through thursday. ahead of this low, south southwest 
winds will increase tuesday afternoon through wednesday and 
become gusty. there remains a risk for gusts to approach gales, 
particularly over the northern half of the open waters, and will
continue to be monitored for possible headlines. the low will 
pull a cold front across the waters wednesday night into 
thursday, delivering scattered showers and shifting winds to 
the west northwest.


lmz261-362-364-366-563-565-567-868-050315-
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-
256 pm cdt sun oct 4 2026

sheboygan wi to pentwater mi north...

.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
slight chance of waterspouts. waves 4 to 6 ft occasionally to
8 ft. 
.monday...northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday night...north winds 10 to 20 kt veering to southeast 5 to
10 kt late in the evening, then becoming south after midnight
becoming 10 to 20 kt late. waves 1 to 2 ft building to 2 to 4 ft.
.tuesday...south winds to 30 kt increasing to gales to 35 kt in 
the afternoon. waves 6 to 9 ft occasionally to 12 ft building to 
10 to 14 ft occasionally to 18 ft. 
.tuesday night...southwest gales to 35 kt becoming west to 30 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest winds 15 to 25 kt becoming west. waves
3 to 5 ft subsiding to 1 to 3 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft. 
.thursday...northwest winds 15 to 25 kt becoming west. waves 2 to
4 ft. 
.friday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft.  

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534554

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz162-050800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun oct 4 2026 /301 pm cdt sun oct 4 2026/

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

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534555

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz263-050800-
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 sun oct 4 2026

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

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534556

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz264-050800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sun oct 4 2026

.late this afternoon...northwest winds 20 to 30 knots. waves 5 to
8 feet occasionally to 10 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. sprinkles through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots increasing to 15 to
25 knots. a slight chance of showers. waves building to 2 to
4 feet. 
.tuesday...south winds 15 to 25 knots veering southwest by mid
afternoon. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.wednesday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.wednesday night...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.thursday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.friday...northwest winds 10 to 20 knots backing southeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534557

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz265-050800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sun oct 4 2026

...gale warning in effect until 11 pm edt this evening...

.late this afternoon...northwest gales to 35 knots. waves 4 to
8 feet occasionally to 10 feet. 
.tonight...northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. sprinkles through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.monday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then increasing to 20 to 30 knots
late. a slight chance of showers after midnight. waves building
to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots becoming southwest 15 to
25 knots by mid afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet. 
.tuesday night...west winds 20 to 30 knots increasing to gales to
35 knots after midnight. waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...west gales to 35 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.wednesday night...northwest gales to 35 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.thursday...west winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet. 
.friday...northwest winds 15 to 25 knots becoming southeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534558

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz266-050800-
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 sun oct 4 2026

...gale warning in effect until 11 pm edt this evening...

.late this afternoon...northwest gales to 35 knots. a chance of
showers. waves 8 to 11 feet occasionally to 14 feet. 
.tonight...northwest gales to 35 knots diminishing to 20 to
30 knots late. a slight chance of waterspouts through midnight. a
chance of showers. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.monday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a chance of showers through early
afternoon. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. a slight chance of showers after midnight. waves subsiding
to calm to 2 feet, then building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.tuesday night...west 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 6 feet occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots backing west by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...northwest winds 20 to 30 knots. a chance of
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.friday...northwest winds 15 to 25 knots becoming southeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 042001
glfls 
expires:202610050800;;534559

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun oct 4 2026

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

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

.synopsis...

a 29.6 inch low over james bay this evening will deepen to 29.5 
inches over northern quebec by monday morning. as this low departs 
to the east, 30.3 inch high pressure over the northern plains this 
evening will shift east to the great lakes at 30.2 to 30.3 inches on 
monday. a 29.5 inch low then drops southeast out of northern canada, 
reaching northern ontario at 29.5 inches by tuesday evening. this 
brings 29.6 inch troughing over lake superior on tuesday, weakening 
to 29.7 inches through wednesday. high pressure builds back in from 
the canadian prairie and northern plains late in the week, resulting 
in 30.1 inch ridging over lake superior late thursday into friday.




lsz267-050800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sun oct 4 2026

...gale warning in effect until 11 pm edt this evening...

.late this afternoon...northwest gales to 35 knots. a chance of
showers. waves 9 to 12 feet occasionally to 15 feet. 
.tonight...northwest gales to 35 knots. a slight chance of
waterspouts. a chance of showers. waves subsiding to 8 to 11 feet
occasionally to 14 feet, then building to 9 to 12 feet
occasionally to 15 feet. 
.monday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of showers. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 5 to 15 knots backing south after
midnight, then increasing to 10 to 20 knots late. a slight chance
of showers after midnight. waves subsiding to calm to 2 feet. 
.tuesday...south winds 20 to 30 knots. a chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.tuesday night...southwest winds 20 to 30 knots veering west
after midnight. a chance of showers through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots backing west by mid
afternoon. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. a chance of showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots becoming southeast 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 

$$