FZUS63 KMQT 261402

GLFLS 



Open Lake Forecast for Lake Superior

National Weather Service Marquette MI

1002 AM EDT Thu Jun 26 2025



For waters beyond 5 nautical miles of shore on Lake Superior.



Waves are the significant wave height - the average of the

highest 1/3 of the wave spectrum. Occasional wave height is the

average of the highest 1/10 of the wave spectrum.



.SYNOPSIS...



30.1 inch ridging remains over much of Lake Superior today as a 30.2 

inch is over Quebec. Meanwhile, a 29.8 inch low lifts into the Upper 

Mississippi Valley, passing near the Straits of Mackinaw on Friday. 

Weak 30.0 inch ridging then resides over the lake until Saturday 

afternoon when a 29.6 inch low passing through northern Ontario 

brings a 29.8 inch trough over the lake on Sunday. Monday into 

Tuesday, Lake Superior will be between a 30.0 inch high over the 

Plains and a low over Quebec deepening from 29.6 to 29.3 inches.





LSZ162-262000-

Lake Superior west of a line from Saxon Harbor WI to Grand

Portage MN beyond 5NM-

1002 AM EDT Thu Jun 26 2025 /902 AM CDT Thu Jun 26 2025/



.REST OF TODAY...Northeast winds 15 to 25 knots. Isolated showers

by mid afternoon. Waves 2 to 4 feet. 

.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to

20 knots after midnight. A chance of showers. Waves 2 to 4 feet. 

.FRIDAY...Northeast winds 10 to 20 knots diminishing to 5 to

15 knots late. Waves subsiding to calm to 2 feet. 

.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming east less

than 10 knots after midnight. Waves calm to 2 feet. 

.SATURDAY...East winds 5 to 15 knots. A chance of showers. A

slight chance of thunderstorms by mid afternoon. Waves calm to

2 feet. 

.SATURDAY NIGHT...Northeast winds 5 to 15 knots backing west

after midnight. A chance of showers through midnight. A chance of

thunderstorms. Showers likely after midnight. Waves calm to

2 feet. 

.SUNDAY...Southwest winds 5 to 15 knots becoming west 10 to

20 knots. A chance of showers. Waves calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots. A chance of showers. Waves

calm to 2 feet. 



$$



LSZ263-262000-

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-

1002 AM EDT Thu Jun 26 2025



.REST OF TODAY...Northeast winds 10 to 20 knots. Isolated showers

by mid afternoon. Waves 1 to 3 feet building to 2 to 4 feet. 

.TONIGHT...East winds 10 to 20 knots backing northeast after

midnight. A chance of showers. Waves 2 to 4 feet. 

.FRIDAY...Northeast winds 10 to 20 knots diminishing to 5 to

15 knots in the afternoon, then backing north late. A slight

chance of showers through early afternoon. Waves subsiding to

calm to 2 feet. 

.FRIDAY NIGHT...North winds 5 to 15 knots becoming southwest less

than 10 knots after midnight. Waves calm to 2 feet. 

.SATURDAY...South winds less than 10 knots becoming east 5 to

15 knots by mid afternoon. A slight chance of showers and

thunderstorms by mid afternoon. Waves calm to 2 feet. 

.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest

after midnight. A chance of showers through midnight. Showers

likely after midnight. Waves calm to 2 feet. 

.SUNDAY...Southwest winds 5 to 15 knots veering west. A chance of

showers. Waves calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.

A chance of showers. Waves building to 1 to 3 feet, then

subsiding to calm to 2 feet. 



$$



LSZ264-262000-

Lake Superior from Upper Entrance to Portage Canal to Manitou

Island MI 5NM off shore to the US/Canadian Border-

1002 AM EDT Thu Jun 26 2025



.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by

mid afternoon. Waves calm to 2 feet. 

.TONIGHT...East winds 5 to 15 knots backing northeast late. A

chance of showers. Waves building to 1 to 3 feet. 

.FRIDAY...Northeast winds 5 to 15 knots backing north late. A

chance of showers through early afternoon. Waves subsiding to

calm to 2 feet. 

.FRIDAY NIGHT...Northwest winds 5 to 15 knots becoming west less

than 10 knots after midnight. Waves calm to 2 feet. 

.SATURDAY...South winds less than 10 knots becoming southeast

5 to 15 knots by mid afternoon. Waves calm to 2 feet. 

.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south

after midnight. A chance of showers. Waves calm to 2 feet. 

.SUNDAY...Southwest winds 5 to 15 knots veering west. A chance of

showers. Waves calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.

Waves calm to 2 feet. 



$$



LSZ265-262000-

Lake Superior West of Line from Manitou Island to Marquette MI

Beyond 5NM from shore-

1002 AM EDT Thu Jun 26 2025



.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by

mid afternoon. Waves calm to 2 feet. 

.TONIGHT...East winds 10 to 20 knots. Showers. Waves building to

2 to 4 feet. 

.FRIDAY...Northeast winds 10 to 20 knots backing north in the

afternoon. A chance of showers through early afternoon. Waves

subsiding to 1 to 3 feet. 

.FRIDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to

calm to 2 feet. 

.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots

by mid afternoon. Waves calm to 2 feet. 

.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south

after midnight. A chance of showers. Waves calm to 2 feet. 

.SUNDAY...South winds 10 to 20 knots veering west. A chance of

showers. Waves calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet. 



$$



LSZ266-262000-

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-

1002 AM EDT Thu Jun 26 2025



.REST OF TODAY...Northeast winds 10 to 20 knots veering east

late. Isolated showers by mid afternoon. Waves calm to 2 feet. 

.TONIGHT...East winds 10 to 20 knots. A chance of showers through

midnight, then showers after midnight. Waves building to 2 to

4 feet. 

.FRIDAY...Northeast winds 10 to 20 knots backing north late. A

chance of showers. Waves subsiding to 1 to 3 feet. 

.FRIDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to

calm to 2 feet. 

.SATURDAY...Northwest winds 5 to 15 knots backing southeast by

mid afternoon. Waves calm to 2 feet. 

.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south

after midnight. A chance of showers. Waves calm to 2 feet. 

.SUNDAY...South winds 10 to 20 knots veering southwest. A chance

of showers. Waves calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet. 



$$



LSZ267-262000-

Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off

shore to the US/Canadian border-

1002 AM EDT Thu Jun 26 2025



.REST OF TODAY...East winds 10 to 20 knots. Isolated showers by

mid afternoon. Waves calm to 2 feet. 

.TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots

late. A chance of showers through midnight, then showers and a

slight chance of thunderstorms after midnight. Waves building to

1 to 3 feet. 

.FRIDAY...East winds 10 to 20 knots backing north late. Showers

through early afternoon, then a chance of showers by mid

afternoon. Waves subsiding to calm to 2 feet. 

.FRIDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to

15 knots after midnight. Waves calm to 2 feet. 

.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet. 

.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south

10 to 20 knots after midnight. A chance of showers. Waves calm to

2 feet. 

.SUNDAY...South winds 10 to 20 knots. A chance of showers. Waves

calm to 2 feet. 

.MONDAY...West winds 10 to 20 knots. A chance of showers. Waves

calm to 2 feet. 



$$



LSZ261-262000-

MAFOR 2615/

Superior West 12130 11130 19136 14120 11120. Waves 2 to 4 feet. 



Superior North Central 14210 11210 11220 11116 11110. Waves 1 to

3 feet. 



Superior South Central 11210 11220 11220 19226 11210 13226 11120.

Waves 1 to 2 feet this afternoon. Waves 2 to 4 feet tonight and

Friday morning. 



Superior East 11110 12210 12220 11226 12126. Waves 1 to 3 feet. 



$$



WFO MQT



Experimental modernized open lake forecast is available online at

weather.gov/mqt/glftable



Graphical marine forecasts are available online at:

weather.gov/greatlakes

