fzus63 kmqt 301401
glfls 
expires:202608302000;;609454

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 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 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun aug 30 2026 /901 am cdt sun aug 30 2026/

.rest of today...northeast winds 10 to 20 knots increasing to
20 to 30 knots in the afternoon. a slight chance of showers.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...northeast winds 20 to 30 knots veering east after
midnight, then diminishing to 10 to 20 knots late. a chance of
showers and thunderstorms. waves subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots becoming west 10 to 20 knots
in the afternoon, then backing southwest late. a slight chance of
showers and thunderstorms through early afternoon. waves
subsiding to calm to 2 feet. 
.monday night...west winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots veering northeast.
waves calm to 2 feet. 
.thursday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609455

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 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 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz263-302000-
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-
1001 am edt sun aug 30 2026

.rest of today...east winds 5 to 15 knots becoming northeast
15 to 25 knots in the afternoon. a slight chance of showers.
waves calm to 2 feet building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers and thunderstorms.
waves subsiding to 1 to 3 feet. 
.monday...southeast winds 10 to 20 knots veering south in the
afternoon, then becoming west 5 to 15 knots late. a chance of
showers and a slight chance of thunderstorms. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. a slight chance of showers after midnight. waves
subsiding to calm to 2 feet. 
.tuesday...southwest winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north less
than 10 knots. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots veering east. waves
calm to 2 feet. 

$$