fzus61 kbuf 252002
glflo 
expires:202609260300;;048376

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri sep 25 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 expansive 30.3 inch high will persist across 
ontario and southern quebec through saturday before drifting to 
eastern quebec and labrador sunday. meanwhile, low pressure off the 
east coast will deepen to 29.2 inches saturday east of the delmarva. 
this low will move to near the jersey shore and long island saturday 
night through sunday, then meander northeast along the new england 
coast monday through tuesday while gradually filling to 29.8 inches.


loz062-260300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt fri sep 25 2026

.tonight...northwest winds less than 10 knots becoming northeast
10 to 15 knots. waves 2 feet or less building to 2 to 3 feet. 
.saturday...northeast winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.saturday night...north winds 10 to 15 knots becoming northeast
15 to 20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.sunday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.sunday night...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet building to 3 to 5 feet. 
.monday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves 2 to 4 feet subsiding to 2 feet or less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.wednesday...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 

$$

fzus61 kbuf 252002
glflo 
expires:202609260300;;048377

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri sep 25 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 expansive 30.3 inch high will persist across 
ontario and southern quebec through saturday before drifting to 
eastern quebec and labrador sunday. meanwhile, low pressure off the 
east coast will deepen to 29.2 inches saturday east of the delmarva. 
this low will move to near the jersey shore and long island saturday 
night through sunday, then meander northeast along the new england 
coast monday through tuesday while gradually filling to 29.8 inches.


loz063>065-260300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri sep 25 2026

.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...northeast winds 15 to 20 knots becoming north. waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.saturday night...north winds 15 to 25 knots becoming northeast.
waves 2 to 4 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.sunday...northeast winds to 30 knots diminishing to 15 to
25 knots. a chance of rain in the afternoon. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.sunday night...northeast winds 15 to 20 knots. a chance of rain.
waves 3 to 6 feet. 
.monday...northeast winds 5 to 15 knots becoming north. waves
2 to 4 feet subsiding to 1 foot or less. 
.tuesday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kcle 251938
glfle 
expires:202609260215;;047773

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 25 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...
high pressure 30.20 inches will persist over the great lakes
through monday before shifting to the east on tuesday. a cold
front will slowly approach from the west on wednesday.


lez164>167-260215-
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-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
338 pm edt fri sep 25 2026

.tonight...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...north winds 10 to 15 knots becoming northeast.
waves 2 to 3 feet. 
.sunday...northeast winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.sunday night...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming south. waves
2 feet or less. 
.wednesday...south winds 5 to 15 knots. a chance of showers
wednesday night. waves 1 to 3 feet. 

$$

fzus61 kcle 251938
glfle 
expires:202609260215;;047774

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 25 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...
high pressure 30.20 inches will persist over the great lakes
through monday before shifting to the east on tuesday. a cold
front will slowly approach from the west on wednesday.


lez061-168-169-260215-
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 fri sep 25 2026

.tonight...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...northeast winds 10 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 10 to 15 knots. waves 1 to
3 feet. 
.monday...northeast winds 10 to 15 knots becoming light and
variable. waves 2 feet or less. 
.tuesday...north winds 10 knots or less becoming south. waves
2 feet or less. 
.wednesday...south winds 5 to 15 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 251938
glfle 
expires:202609260215;;047772

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 25 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...
high pressure 30.20 inches will persist over the great lakes
through monday before shifting to the east on tuesday. a cold
front will slowly approach from the west on wednesday.


lez162-163-260215-
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-
338 pm edt fri sep 25 2026

.tonight...northeast winds 10 to 15 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...northeast winds 5 to 15 knots becoming north.
waves 2 feet or less. 
.sunday...north winds around 10 knots. waves 1 to 2 feet. 
.sunday night...north winds 10 to 15 knots. waves 1 to 2 feet. 
.monday...north winds 10 knots or less. waves 2 feet or less. 
.tuesday...west winds 10 knots or less becoming south. waves
2 feet or less. 
.wednesday...south winds 10 to 15 knots. a chance of showers.
waves 1 to 2 feet. 

$$

fzus63 kdtx 251955
glfsc 
expires:202609260400;;048068

lake st clair forecast
national weather service detroit/pontiac mi
355 pm edt fri sep 25 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 strong high pressure system, 30.30 inches, will
continue to expand from quebec/ontario into michigan today. this
will bring an extended period of light winds and dry weather that
will last through early next week.


lcz460-260400-
lake st clair-
355 pm edt fri sep 25 2026

.tonight...northeast winds 10 to 15 knots. partly cloudy until early
morning then clearing. waves 2 feet or less.
.saturday...north winds 5 to 10 knots. sunny. waves 2 feet or less.
.saturday night...north winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. clear. waves 2 feet or less.
.sunday...north winds 5 to 10 knots increasing to 10 to 15 knots in
the late morning and afternoon. mostly sunny. waves 2 feet or less.
.sunday night...north winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. clear. waves 2 feet or less.
.monday...north winds 5 to 10 knots. sunny becoming mostly sunny in
the afternoon becoming clear. waves 2 feet or less.
.tuesday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.wednesday...south winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 251955
glflh 
expires:202609260400;;048064

open lake forecast for lake huron
national weather service detroit/pontiac mi
355 pm edt fri sep 25 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 strong high pressure system, 30.30 inches, will
continue to expand from quebec/ontario into michigan today. this
will bring an extended period of light winds and dry weather that
will last through early next week.


lhz361-260400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
355 pm edt fri sep 25 2026

.tonight...light and variable winds. waves 2 feet or less. 
.saturday...light and variable winds. waves 2 feet or less. 
.saturday night...light and variable winds. waves 2 feet or less.
.sunday...northeast winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.sunday night...light and variable winds. waves 2 feet or less. 
.monday...light and variable winds. waves nearly calm. 
.tuesday...light and variable winds becoming southeast 5 to
10 knots by midnight. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots. a chance of showers.
waves 1 to 3 feet. 


$$

fzus63 kdtx 251955
glflh 
expires:202609260400;;048065

open lake forecast for lake huron
national weather service detroit/pontiac mi
355 pm edt fri sep 25 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 strong high pressure system, 30.30 inches, will
continue to expand from quebec/ontario into michigan today. this
will bring an extended period of light winds and dry weather that
will last through early next week.


lhz362-363-260400-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
355 pm edt fri sep 25 2026

.tonight...light and variable winds becoming north 5 to 10 knots
early in the morning. waves 2 feet or less. 
.saturday...north winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...north winds 5 to 10 knots. waves 2 feet or
less. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...north winds 5 to 10 knots. waves 2 feet or less. 
.monday...north winds 5 to 10 knots in the morning becoming light
and variable. waves 2 feet or less. 
.tuesday...light and variable winds becoming southeast 5 to
10 knots . waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots. a chance of showers. waves 2 to 4 feet. 


$$

fzus63 kdtx 251955
glflh 
expires:202609260400;;048066

open lake forecast for lake huron
national weather service detroit/pontiac mi
355 pm edt fri sep 25 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 strong high pressure system, 30.30 inches, will
continue to expand from quebec/ontario into michigan today. this
will bring an extended period of light winds and dry weather that
will last through early next week.


lhz462>464-260400-
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-
355 pm edt fri sep 25 2026

.tonight...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday...northeast winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon...then becoming northeast 5 to
10 knots late in the afternoon. waves 1 to 3 feet. 
.saturday night...north winds 10 to 15 knots becoming northeast
5 to 10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.sunday...northeast winds 5 to 10 knots becoming north 10 to
15 knots in the late morning and afternoon. waves 2 feet or less
building to 2 to 4 feet early in the afternoon. 
.sunday night...north winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.monday...north winds 5 to 10 knots becoming light and variable.
waves 2 feet or less. 
.tuesday...light and variable winds becoming south 5 to 10 knots
by midnight. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots increasing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet. 


$$

fzus63 kmkx 251939
glflm 
expires:202609260315;;047777

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt fri sep 25 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...

high pressure around 30.3 inches will linger over southern 
ontario canada and the great lakes into the weekend, gradually 
weakening to 30.1 inches. northeast winds this evening will 
become east to southeast again by saturday morning. predominantly 
dry and quiet weather is expected through the weekend.

high pressure will progress into the ohio valley early tuesday, 
allowing winds to turn south and increase as low pressure
approaches from the west. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-260315-
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-
239 pm cdt fri sep 25 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds 5 to 10 kt becoming east. waves 1 to
2 ft. 
.saturday...east winds 10 to 15 kt becoming northeast. waves 1 to
2 ft. 
.saturday night...northeast winds 5 to 10 kt becoming east. waves
1 to 2 ft. 
.sunday...northeast winds 5 to 10 kt becoming north 10 to 20 kt
in the afternoon. waves 1 to 2 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast 5 to
10 kt overnight. waves 1 to 2 ft. 
.monday...northeast winds 5 to 10 kt becoming north. waves 1 to
2 ft. 
.monday night...northeast winds 5 to 10 kt veering to southeast.
waves 1 ft or less. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.wednesday...south winds 15 to 25 kt. showers likely. waves 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 251939
glflm 
expires:202609260315;;047776

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt fri sep 25 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...

high pressure around 30.3 inches will linger over southern 
ontario canada and the great lakes into the weekend, gradually 
weakening to 30.1 inches. northeast winds this evening will 
become east to southeast again by saturday morning. predominantly 
dry and quiet weather is expected through the weekend.

high pressure will progress into the ohio valley early tuesday, 
allowing winds to turn south and increase as low pressure
approaches from the west. 


lmz261-362-364-366-563-565-567-868-260315-
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-
239 pm cdt fri sep 25 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 5 to 10 kt becoming east. waves 1 ft
or less. 
.saturday...east winds 5 to 10 kt backing to northeast. waves
1 to 2 ft. 
.saturday night...northeast winds 10 to 15 kt veering to
southeast. waves 1 ft or less. 
.sunday...southeast winds 5 to 10 kt backing to north. waves 1 ft
or less. 
.sunday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 ft or less. 
.monday...northeast winds 5 to 10 kt becoming north. waves nearly
calm. 
.monday night...northeast winds 5 to 10 kt veering to south.
waves nearly calm. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.wednesday...south winds 15 to 25 kt. chance of showers. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048315

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri sep 25 2026 /301 pm cdt fri sep 25 2026/

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...west winds less than 10 knots veering north after
midnight. waves calm to 2 feet. 
.monday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048316

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz263-260800-
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 fri sep 25 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048317

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz264-260800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri sep 25 2026

.late this afternoon...south winds less than 10 knots. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds less than 10 knots veering west
after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots veering southeast by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
building to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots veering west. a chance
of showers. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048318

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz265-260800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri sep 25 2026

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

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048319

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz266-260800-
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 fri sep 25 2026

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

$$

fzus63 kmqt 252002
glfls 
expires:202609260800;;048320

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 25 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...

30.3 inch high pressure remains stretched out over the great lakes 
basin today through saturday, with 29.4 inch low pressure developing 
over the northern rockies. on saturday the high begins shifting 
northeast toward northern quebec while the low deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens ridging over lake superior from 30.1 inches 
sunday morning to 29.9 inches by late monday as a 29.8 inch trough 
approaches from the west. by tuesday evening the trough will move 
over lake superior at around 29.7 inches.




lsz267-260800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri sep 25 2026

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

$$