fzus63 kmqt 222001
glfls 
expires:202608230800;;184379

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat aug 22 2026 /301 pm cdt sat aug 22 2026/

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves calm to 2 feet. 
.sunday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming south less than
10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots backing north
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184380

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz263-230800-
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 sat aug 22 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday...north winds 10 to 20 knots becoming west 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest late.
waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots veering south
after midnight. showers likely and a chance of thunderstorms.
waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$