fzus63 kmqt 251501
glfls 
expires:202602252100;;233805

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed feb 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...

a 29.3 inch low over northeastern ontario moves to quebec this 
afternoon with weak ridging building over lake superior at 29.8 
inches tonight into thursday. a strong clipper low averaging 29.1 
inches moves across northern ontario friday and friday night, 
sending a 29.4 inch trough across the lake. high pressure builds 
over the lake this weekend, strengthening to 30.6 inches by sunday.



lsz162-252100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed feb 25 2026 /900 am cst wed feb 25 2026/

.rest of today...northwest winds 15 to 25 knots diminishing to
10 to 20 knots by mid afternoon. a chance of snow showers. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
a slight chance of snow showers. waves subsiding to calm to
2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. a chance of snow. waves calm to 2 feet. 
.thursday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...southwest winds 15 to 25 knots becoming west gales to
45 knots in the afternoon. waves building to 6 to 9 feet
occasionally to 11 feet. 
.friday night...west gales to 45 knots becoming northwest gales
to 35 knots after midnight. heavy freezing spray. waves building
to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 251501
glfls 
expires:202602252100;;233806

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed feb 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...

a 29.3 inch low over northeastern ontario moves to quebec this 
afternoon with weak ridging building over lake superior at 29.8 
inches tonight into thursday. a strong clipper low averaging 29.1 
inches moves across northern ontario friday and friday night, 
sending a 29.4 inch trough across the lake. high pressure builds 
over the lake this weekend, strengthening to 30.6 inches by sunday.



lsz263-252100-
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-
1000 am est wed feb 25 2026

.rest of today...northwest winds 15 to 25 knots diminishing to
10 to 20 knots by mid afternoon. heavy freezing spray late in the
morning. a chance of snow showers. waves 4 to 7 feet occasionally
to 9 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing west late. a slight chance of
snow showers. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots. a chance of snow.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots becoming west gales to
45 knots in the afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.friday night...west gales to 45 knots becoming northwest gales
to 40 knots after midnight. heavy freezing spray. waves building
to 10 to 14 feet occasionally to 18 feet, then subsiding to 6 to
9 feet occasionally to 11 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.sunday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$