fzus63 kmqt 271501
glfls 
expires:202602272100;;341765

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri feb 27 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 strong clipper low of 29.2 inches moves across northern ontario 
today and tonight, sending a 29.4 inch trough across the lake. high 
pressure builds over the lake this weekend, strengthening to 30.6 
inches by sunday. ridging continues into early next week ahead of a 
weak 30.1 inch trough monday night.



lsz162-272100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est fri feb 27 2026 /900 am cst fri feb 27 2026/

...gale warning in effect through late tonight...
...heavy freezing spray warning in effect from 7 pm est /6 pm
cst/ this evening through saturday morning...

.rest of today...southwest winds 20 to 30 knots becoming west
gales to 40 knots by mid afternoon. waves 2 to 4 feet building to
7 to 10 feet occasionally to 13 feet. 
.tonight...west gales to 45 knots becoming northwest gales to
35 knots by midnight, then diminishing to 15 to 25 knots late.
heavy freezing spray in the evening. waves building to 9 to
12 feet occasionally to 15 feet, then 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...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 271501
glfls 
expires:202602272100;;341766

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri feb 27 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 strong clipper low of 29.2 inches moves across northern ontario 
today and tonight, sending a 29.4 inch trough across the lake. high 
pressure builds over the lake this weekend, strengthening to 30.6 
inches by sunday. ridging continues into early next week ahead of a 
weak 30.1 inch trough monday night.



lsz263-272100-
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 fri feb 27 2026

...gale warning in effect through late tonight...
...heavy freezing spray warning in effect from 7 pm est this
evening through saturday morning...

.rest of today...south winds 15 to 25 knots becoming southwest
gales to 35 knots by late morning, then becoming west gales to
45 knots by mid afternoon. a slight chance of snow showers in the
afternoon. waves 2 to 4 feet building to 8 to 11 feet
occasionally to 14 feet. 
.tonight...west gales to 45 knots becoming northwest gales to
40 knots by midnight, then diminishing to 20 to 30 knots late.
heavy freezing spray. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots. waves building to 1 to
3 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...southwest winds 20 to 30 knots veering west. waves
subsiding to calm to 2 feet, then building to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$