fzus63 kmqt 302001
glfls 
expires:202605010800;;799065

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu apr 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu apr 30 2026 /301 pm cdt thu apr 30 2026/

.late this afternoon...southwest winds 5 to 15 knots. a slight
chance of rain and snow showers. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight.
a slight chance of rain and snow showers through midnight. waves
calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering east in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799066

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu apr 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz263-010800-
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 apr 30 2026

.late this afternoon...west winds less than 10 knots. a slight
chance of rain and snow showers. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a slight chance of rain and snow showers through
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$