fzus63 kmqt 251401
glfls 
expires:202608252000;;337455

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue aug 25 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...

this morning, lake superior is between 30.1 inch high pressure over 
the southern great lakes basin and a 29.8 inch low over the 
ontario/manitoba line. as the high pushes off to the southeast, the 
low will move directly over lake superior by midday wednesday. by 
thursday morning, the low will deepen to 29.6 inches as it moves 
into western quebec as 30.2 inch high pressure develops in manitoba. 
this high moves over lake superior by midday friday and over the 
lower great lakes saturday. saturday night, low pressure over the 
central to northern plains deepens to 29.7 inches. this low 
approaches the great lakes by early next week.




lsz162-252000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue aug 25 2026 /901 am cdt tue aug 25 2026/

.rest of today...south winds 5 to 15 knots backing east in the
afternoon. a chance of showers and thunderstorms. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering west after midnight,
then increasing to 10 to 20 knots late. a chance of showers and
thunderstorms through midnight. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots veering northwest late.
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 south by mid
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. 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 251401
glfls 
expires:202608252000;;337456

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue aug 25 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...

this morning, lake superior is between 30.1 inch high pressure over 
the southern great lakes basin and a 29.8 inch low over the 
ontario/manitoba line. as the high pushes off to the southeast, the 
low will move directly over lake superior by midday wednesday. by 
thursday morning, the low will deepen to 29.6 inches as it moves 
into western quebec as 30.2 inch high pressure develops in manitoba. 
this high moves over lake superior by midday friday and over the 
lower great lakes saturday. saturday night, low pressure over the 
central to northern plains deepens to 29.7 inches. this low 
approaches the great lakes by early next week.




lsz263-252000-
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 tue aug 25 2026

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

$$