fzus63 kmqt 271401
glfls 
expires:202605272000;;734656

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 27 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... 

ridging of 30.2 inches persists over lake superior today due to a 
30.3 inch high centered over hudson bay. on thursday, this parent 
high shifts southward over the lake at 30.3 inches. the high center 
weakens to around 30.1 inches on friday as it continues its 
southerly propagation towards lower michigan, causing pressure to 
decrease to 29.9 inches over lake superior. following this, a second 
ridge pushing in from hudson bay brings 30.1 inch ridging back over 
the lake late on friday. pressure subsequently increases to 30.3 
inches by saturday midday as this second parent high over hudson bay 
propagates south. high pressure persists over lake superior through 
early next week.



lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed may 27 2026 /901 am cdt wed may 27 2026/

.rest of today...northeast winds 10 to 20 knots becoming east
15 to 25 knots in the afternoon, then backing northeast late.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east late.
waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves building to 1 to
3 feet. 
.friday night...northeast winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.saturday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 271401
glfls 
expires:202605272000;;734657

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed may 27 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... 

ridging of 30.2 inches persists over lake superior today due to a 
30.3 inch high centered over hudson bay. on thursday, this parent 
high shifts southward over the lake at 30.3 inches. the high center 
weakens to around 30.1 inches on friday as it continues its 
southerly propagation towards lower michigan, causing pressure to 
decrease to 29.9 inches over lake superior. following this, a second 
ridge pushing in from hudson bay brings 30.1 inch ridging back over 
the lake late on friday. pressure subsequently increases to 30.3 
inches by saturday midday as this second parent high over hudson bay 
propagates south. high pressure persists over lake superior through 
early next week.



lsz263-272000-
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 wed may 27 2026

.rest of today...northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then veering east late. waves
1 to 3 feet building to 2 to 4 feet. 
.tonight...east winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight, then diminishing to less than 10 knots
late. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots backing northeast in the
afternoon. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. a slight chance of rain
showers by mid afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.saturday...east winds 10 to 20 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$