fzus63 kmqt 280728
glfls 
expires:202602281530;;379934

open lake forecast for lake superior
national weather service marquette mi
228 am est sat feb 28 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 29.2 inch clipper low moving through northern ontario tonight is 
sending a 29.4 inch trough over the lake tonight. the low deepens 
further to 29.0 inches near james bay by saturday morning, while 
high pressure builds o 30.6 inches over the canadian prairies. this 
brings ridging of at least 30.4 inches over the lake by saturday 
afternoon, building to 30.6 inches sunday before a weak 30.1 inch 
trough slides through monday.



lsz162-281530-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
228 am est sat feb 28 2026 /128 am cst sat feb 28 2026/

...heavy freezing spray warning in effect until 7 am est /6 am
cst/ this morning...

.rest of tonight...northwest winds 20 to 30 knots diminishing to
15 to 25 knots late. waves 5 to 8 feet occasionally to 10 feet
subsiding to 2 to 4 feet. heavy freezing spray.
.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 by 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 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.monday night...southwest gales to 35 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet. 
.tuesday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming east 15 to
25 knots. waves building to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 280728
glfls 
expires:202602281530;;379935

open lake forecast for lake superior
national weather service marquette mi
228 am est sat feb 28 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 29.2 inch clipper low moving through northern ontario tonight is 
sending a 29.4 inch trough over the lake tonight. the low deepens 
further to 29.0 inches near james bay by saturday morning, while 
high pressure builds o 30.6 inches over the canadian prairies. this 
brings ridging of at least 30.4 inches over the lake by saturday 
afternoon, building to 30.6 inches sunday before a weak 30.1 inch 
trough slides through monday.



lsz263-281530-
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-
228 am est sat feb 28 2026

...heavy freezing spray warning in effect until 10 am est this
morning...

.rest of tonight...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots
late. heavy freezing spray. waves 6 to 9 feet occasionally to
11 feet 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 by
midnight, then backing northwest late. 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 calm to 2 feet. 
.monday...southwest winds 10 to 20 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.monday night...southwest 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 1 to 3 feet. 
.wednesday...west winds 20 to 30 knots backing east. waves
subsiding to calm to 2 feet, then building to 6 to 9 feet
occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$