fzus63 kmqt 142001
glfls 
expires:202608150800;;191723

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri aug 14 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...

30.2 high pressure over lake superior this afternoon and early this 
evening gives way to a 29.9 inch low saturday night as the 
aforementioned high moves east towards new england. this low deepens 
to 29.8 inches as it reaches the lower great lakes by sunday 
afternoon. sunday night into monday, a 30.1 inch high over the 
plains weakens to 30.0 inches as it slides generally south of lake 
superior. by tuesday, this high becomes centered south of the great 
lakes as a 29.4 inch low over hudson bay extends a 29.8 inch trough 
over lake superior. a second 29.7 inch low moves through the great 
lakes region into southern ontario on wednesday. 




lsz162-150800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri aug 14 2026 /301 pm cdt fri aug 14 2026/

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

$$

fzus63 kmqt 142001
glfls 
expires:202608150800;;191724

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri aug 14 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...

30.2 high pressure over lake superior this afternoon and early this 
evening gives way to a 29.9 inch low saturday night as the 
aforementioned high moves east towards new england. this low deepens 
to 29.8 inches as it reaches the lower great lakes by sunday 
afternoon. sunday night into monday, a 30.1 inch high over the 
plains weakens to 30.0 inches as it slides generally south of lake 
superior. by tuesday, this high becomes centered south of the great 
lakes as a 29.4 inch low over hudson bay extends a 29.8 inch trough 
over lake superior. a second 29.7 inch low moves through the great 
lakes region into southern ontario on wednesday. 




lsz263-150800-
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 fri aug 14 2026

.late this afternoon...east winds 15 to 25 knots. waves calm to
2 feet building to 1 to 3 feet. 
.tonight...east winds 15 to 25 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northwest
after midnight, then backing west late. a chance of showers and a
slight chance of thunderstorms through midnight. waves calm to
2 feet. 
.sunday...west winds 10 to 20 knots. a slight chance of showers
through early afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a chance of showers. waves subsiding to calm to 2 feet.
.tuesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots backing west. waves calm
to 2 feet. 

$$