fzus63 kmqt 242001
glfls 
expires:202608250800;;296186

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 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 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon aug 24 2026 /301 pm cdt mon aug 24 2026/

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots. a slight chance of showers
after midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering west after
midnight, then increasing to 10 to 20 knots late. a slight chance
of thunderstorms through midnight. a chance of showers. waves
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202608250800;;296187

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon aug 24 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 30.0 inch high pressure moves through the western great lakes 
today before building back to 30.1 inches over the lower peninsula 
of michigan by tuesday morning. meanwhile, 29.7 inch clipper low 
pressure over saskatchewan this afternoon moves across southern 
manitoba on tuesday as it weakens to 29.8 inches. this clipper moves 
over lake superior by wednesday morning before lifting away towards 
james bay and northern quebec wednesday night into thursday morning. 
30.1 inch high pressure ridging returns to lake superior by friday 
afternoon, building to 30.2 inches over the lower great lakes for 
saturday. 




lsz263-250800-
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 mon aug 24 2026

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots backing southeast after
midnight, then veering south late. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east late. a chance
of showers. a chance of thunderstorms by mid afternoon. waves
calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
after midnight, then becoming west 10 to 20 knots late. a chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.wednesday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of showers. waves
building to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$