fzus63 kmqt 192001
glfls 
expires:202609200800;;726275

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 19 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...

weak 30.0 inch troughing currently extending across ontario, just 
west of lake superior, crosses the lake this evening through the 
first half of tonight. into sunday, a 30.2 inch high over the 
canadian prairie builds to 30.4 inches as it moves into northwestern 
ontario. this high pressure center slowly builds to 30.5 inches as 
it shifts into quebec by midday tuesday, trailing a 30.4 inch ridge 
over lake superior. the high builds further to 30.6 inches wednesday 
as it progresses eastward.




lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat sep 19 2026 /301 pm cdt sat sep 19 2026/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight, then becoming northeast 15 to 25 knots late. a slight
chance of showers after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then veering east late. waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
5 feet occasionally to 7 feet. 
.sunday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 2 to 4 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202609200800;;726276

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat sep 19 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...

weak 30.0 inch troughing currently extending across ontario, just 
west of lake superior, crosses the lake this evening through the 
first half of tonight. into sunday, a 30.2 inch high over the 
canadian prairie builds to 30.4 inches as it moves into northwestern 
ontario. this high pressure center slowly builds to 30.5 inches as 
it shifts into quebec by midday tuesday, trailing a 30.4 inch ridge 
over lake superior. the high builds further to 30.6 inches wednesday 
as it progresses eastward.




lsz263-200800-
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 sat sep 19 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots becoming north 10 to 20 knots
after midnight, then becoming northeast 15 to 25 knots late. a
slight chance of showers. waves building to 2 to 4 feet. 
.sunday...northeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...northeast winds 15 to 25 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots backing east. waves
calm to 2 feet. 

$$