fzus63 kmqt 260933
glfls 
expires:202602261745;;275758

open lake forecast for lake superior
national weather service marquette mi
433 am est thu feb 26 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 29.7 inch low will move across lake superior today. 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.



lsz162-261745-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
433 am est thu feb 26 2026 /333 am cst thu feb 26 2026/

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

.early this morning...southwest winds 5 to 15 knots. a chance of
snow showers. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. snow showers likely in the morning, then a slight
chance of snow in the afternoon. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of snow showers in the evening.
waves calm to 2 feet. 
.friday...southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. waves building to 7 to 10 feet occasionally to
13 feet. 
.friday night...northwest gales to 45 knots diminishing to 20 to
30 knots after midnight. heavy freezing spray. waves subsiding to
2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing 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 260933
glfls 
expires:202602261745;;275759

open lake forecast for lake superior
national weather service marquette mi
433 am est thu feb 26 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 29.7 inch low will move across lake superior today. 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.



lsz263-261745-
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-
433 am est thu feb 26 2026

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

.early this morning...southwest winds 5 to 15 knots. a slight
chance of snow showers. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots. snow showers likely in
the morning, then a chance of snow in the afternoon. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of snow showers. waves building to
1 to 3 feet. 
.friday...southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.friday night...northwest gales to 45 knots. heavy freezing
spray. waves building to 11 to 15 feet occasionally to 19 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering north
after midnight. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south. waves 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.

$$