fzus63 kmqt 132001
glfls 
expires:202610140800;;042242

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue oct 13 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...

lake superior remains situated between a 29.6 inch low over 
wisconsin and a 30.2 inch high over quebec. ridging dominates over 
lake superior midweek as the low marches east and high pressure of 
30.2 inches builds over the dakotas by wednesday afternoon. the high 
further builds to 30.3 inches over lake superior wednesday night 
while a 29.9 inch low develops over saskatchewan. by thursday 
evening, this low weakens to 29.9 inches over northern ontario as 
the high moves to new england, then the low rapidly deepens into 
friday while tracking towards new england. meanwhile, 30.6 inch high 
pressure expands across the plains for friday. pressure increases 
rapidly over the upper great lakes friday afternoon into saturday, 
reaching 30.4 inches by saturday morning, then decreasing to 30.0 
inches by saturday night as the high collapses southeast.




lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue oct 13 2026 /301 pm cdt tue oct 13 2026/

.late this afternoon...west winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southeast
late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.thursday night...northwest winds 20 to 30 knots increasing to
gales to 40 knots after midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.friday...north gales to 40 knots becoming northwest 20 to
30 knots by mid afternoon. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest gales to 35 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.sunday...southwest gales to 35 knots becoming west 15 to
25 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202610140800;;042243

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue oct 13 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...

lake superior remains situated between a 29.6 inch low over 
wisconsin and a 30.2 inch high over quebec. ridging dominates over 
lake superior midweek as the low marches east and high pressure of 
30.2 inches builds over the dakotas by wednesday afternoon. the high 
further builds to 30.3 inches over lake superior wednesday night 
while a 29.9 inch low develops over saskatchewan. by thursday 
evening, this low weakens to 29.9 inches over northern ontario as 
the high moves to new england, then the low rapidly deepens into 
friday while tracking towards new england. meanwhile, 30.6 inch high 
pressure expands across the plains for friday. pressure increases 
rapidly over the upper great lakes friday afternoon into saturday, 
reaching 30.4 inches by saturday morning, then decreasing to 30.0 
inches by saturday night as the high collapses southeast.




lsz263-140800-
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 edt tue oct 13 2026

.late this afternoon...west winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming northwest 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...east winds less than 10 knots becoming
southeast 5 to 15 knots late. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.thursday night...west winds 20 to 30 knots becoming northwest
gales to 40 knots after midnight. showers likely through
midnight, then a chance of showers after midnight. waves building
to 9 to 12 feet occasionally to 15 feet. 
.friday...north gales to 45 knots becoming northwest gales to
40 knots by mid afternoon. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday night...northwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...southwest gales to 40 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday...southwest gales to 45 knots becoming west 20 to
30 knots. waves subsiding to 1 to 3 feet. 

$$