fzus63 kmqt 252101
glfls 
expires:202602260900;;248523

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 departs into quebec this evening, 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.



lsz162-260900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est wed feb 25 2026 /300 pm cst wed feb 25 2026/

...gale watch in effect from friday afternoon through late friday
night...

.late this afternoon...northwest winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
a chance of snow showers after midnight. waves subsiding to calm
to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. snow likely in the morning, then a chance of snow in
the afternoon. 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 subsiding
to 3 to 5 feet occasionally to 7 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 252101
glfls 
expires:202602260900;;248524

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 departs into quebec this evening, 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.



lsz263-260900-
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-
400 pm est wed feb 25 2026

...gale watch in effect from friday afternoon through late friday
night...

.late this afternoon...northwest winds 10 to 20 knots. a slight
chance of snow showers. waves 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. snow likely in the
morning, then a chance of snow in the afternoon. 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 by midnight. a slight chance of snow in the
evening. 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 in the afternoon. waves subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots veering north
after midnight. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.sunday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 7 to 10 feet occasionally to 13 feet.

note, wave height forecasts are for ice free areas.

$$