fzus63 kmqt 142001
glfls 
expires:202510150800;;137962

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue oct 14 2025

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...

a 30.4 inch high builds into lake superior today. this high shifts 
across the great lakes and northern ontario by wednesday at around 
30.3 inches. ridging weakens to 30.1 inches over lake superior 
through thursday as troughing develops over the plains and the 
parent high moves east. thursday night through friday, a deepening 
29.3 inch low develops over the northern plains and lifts near to 
lake winnipeg. this low is projected to bring 29.5 to 29.6 inch 
troughing over lake superior friday night and saturday as the low 
moves to hudson bay. by sunday afternoon, another low develops over 
lower michigan, then lifts north into ontario and quebec as 29.7 
inch ridging builds over lake superior.



lsz162-150800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue oct 14 2025 /301 pm cdt tue oct 14 2025/

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

$$

fzus63 kmqt 142001
glfls 
expires:202510150800;;137963

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue oct 14 2025

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...

a 30.4 inch high builds into lake superior today. this high shifts 
across the great lakes and northern ontario by wednesday at around 
30.3 inches. ridging weakens to 30.1 inches over lake superior 
through thursday as troughing develops over the plains and the 
parent high moves east. thursday night through friday, a deepening 
29.3 inch low develops over the northern plains and lifts near to 
lake winnipeg. this low is projected to bring 29.5 to 29.6 inch 
troughing over lake superior friday night and saturday as the low 
moves to hudson bay. by sunday afternoon, another low develops over 
lower michigan, then lifts north into ontario and quebec as 29.7 
inch ridging builds over lake superior.



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 tue oct 14 2025

.late this afternoon...north winds less than 10 knots. waves calm
to 2 feet. 
.tonight...west winds less than 10 knots. a slight chance of
showers through midnight. waves calm to 2 feet. 
.wednesday...west winds less than 10 knots becoming southwest
5 to 15 knots late. waves calm to 2 feet. 
.wednesday night...southwest winds less than 10 knots becoming
southeast 5 to 15 knots after midnight, then veering south late.
waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots backing southeast by mid
afternoon. a chance of showers through early afternoon, then
showers likely by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...south winds 10 to 20 knots. showers likely.
waves 1 to 3 feet. 
.friday...south winds 10 to 20 knots. a chance of showers. waves
1 to 3 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. a chance of showers. waves building to 2 to
4 feet. 
.saturday...west gales to 35 knots diminishing to 15 to 25 knots.
waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...west gales to 35 knots becoming northwest 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet. 

$$