fzus63 kmqt 082101
glfls 
expires:202511090900;;077964

open lake forecast for lake superior
national weather service marquette mi
401 pm est sat nov 8 2025

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 29.9 inch ridge over lake superior this afternoon strengthens to 
30.3 inches through sunday night as 30.6 inch high pressure builds 
over the great plains. the ridge weakens to 29.9 inches through 
monday ahead of a 29.4 inch trough sweeps across the lake late 
tuesday into wednesday. by wednesday night the lake will be between 
30.1 inch ridging over the plains and a deep 28.7 inch low over the 
hudson bay.



lsz162-090900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm est sat nov 8 2025 /301 pm cst sat nov 8 2025/

.late this afternoon...north winds 15 to 25 knots. waves calm to
2 feet. 
.tonight...north winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then becoming northwest 15 to 25 knots
late. scattered snow showers. waves building to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots becoming north 20 to
30 knots. scattered snow showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...north winds 15 to 25 knots. isolated snow
showers. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...west winds 10 to 20 knots backing southwest after
midnight. waves building to 1 to 3 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.tuesday night...west winds 20 to 30 knots veering northwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west gales
to 35 knots. waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 082101
glfls 
expires:202511090900;;077965

open lake forecast for lake superior
national weather service marquette mi
401 pm est sat nov 8 2025

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 29.9 inch ridge over lake superior this afternoon strengthens to 
30.3 inches through sunday night as 30.6 inch high pressure builds 
over the great plains. the ridge weakens to 29.9 inches through 
monday ahead of a 29.4 inch trough sweeps across the lake late 
tuesday into wednesday. by wednesday night the lake will be between 
30.1 inch ridging over the plains and a deep 28.7 inch low over the 
hudson bay.



lsz263-090900-
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-
401 pm est sat nov 8 2025

.late this afternoon...north winds 10 to 20 knots. isolated snow
showers. waves calm to 2 feet. 
.tonight...north winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then becoming northwest 10 to 20 knots
late. scattered snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots veering north. scattered
snow showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday night...north winds 15 to 25 knots increasing to 20 to
30 knots late. scattered snow showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.monday...north winds 20 to 30 knots becoming northwest 10 to
20 knots in the afternoon. isolated snow showers in the morning.
waves subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.tuesday...southwest winds 20 to 30 knots veering west in the
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...west winds 20 to 30 knots veering northwest
after midnight. waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...northwest gales to 40 knots. waves building to 8 to
12 feet occasionally to 15 feet. 
.thursday...west gales to 35 knots becoming northwest 20 to
30 knots. waves subsiding to 1 to 3 feet. 

$$