fzus63 kmqt 092001
glfls 
expires:202607100800;;692710

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jul 9 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 high pressure of 30.0 inches extends over lake superior from 
hudson bay and northern ontario tonight into friday. high pressure 
builds to 30.1 to 30.2 inches over the lake this weekend as the high 
shifts south to the lower great lakes through sunday. a strong low 
of around 29.3 inches looks to cross into hudson bay early next week.




lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu jul 9 2026 /301 pm cdt thu jul 9 2026/

.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...north winds less than 10 knots. patchy fog. waves calm
to 2 feet. 
.friday...north winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon, then veering east late. waves calm to
2 feet. 
.friday night...northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then backing north late. a slight
chance of showers and thunderstorms after midnight. waves calm to
2 feet. 
.saturday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.monday...southwest winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 092001
glfls 
expires:202607100800;;692711

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu jul 9 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 high pressure of 30.0 inches extends over lake superior from 
hudson bay and northern ontario tonight into friday. high pressure 
builds to 30.1 to 30.2 inches over the lake this weekend as the high 
shifts south to the lower great lakes through sunday. a strong low 
of around 29.3 inches looks to cross into hudson bay early next week.




lsz263-100800-
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 thu jul 9 2026

.late this afternoon...northeast winds less than 10 knots. waves
calm to 2 feet. 
.tonight...north winds less than 10 knots backing west after
midnight, then backing east late. patchy fog after midnight.
waves calm to 2 feet. 
.friday...east winds less than 10 knots backing northeast in the
afternoon, then veering east late. patchy dense fog through early
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight, then backing east late. a slight chance of showers and
thunderstorms after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing southeast by
mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...southwest winds 15 to 25 knots. waves building to
2 to 4 feet. 
.monday...southwest winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$