fzus63 kmqt 052002
glfls 
expires:202610060800;;589799

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon oct 5 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 inch high pressure over lake superior this afternoon will shift 
east to the lower great lakes tonight. behind this, a 29.5 inch low 
drops southeast out of northern canada, reaching far northern 
ontario at 29.4 inches by tuesday evening. this brings 29.6 inch 
troughing over lake superior late on tuesday, weakening to 29.7 
inches through wednesday. high pressure builds back in from the 
canadian prairies and northern plains late in the week, resulting in 
30.1 to 30.2 inch ridging over lake superior late thursday into 
friday. a 29.4 inch low will develop off the northern rockies late 
friday and extend a 29.7 to 29.9 inch trough to the upper great 
lakes by saturday night.




lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon oct 5 2026 /301 pm cdt mon oct 5 2026/

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then becoming south 10 to 20 knots late.
a chance of showers. waves building to 1 to 3 feet. 
.tuesday...south winds 10 to 20 knots becoming southwest 15 to
25 knots in the afternoon, then veering west late. waves 1 to
3 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.thursday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.friday...west winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots veering southwest.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 052002
glfls 
expires:202610060800;;589800

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon oct 5 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 inch high pressure over lake superior this afternoon will shift 
east to the lower great lakes tonight. behind this, a 29.5 inch low 
drops southeast out of northern canada, reaching far northern 
ontario at 29.4 inches by tuesday evening. this brings 29.6 inch 
troughing over lake superior late on tuesday, weakening to 29.7 
inches through wednesday. high pressure builds back in from the 
canadian prairies and northern plains late in the week, resulting in 
30.1 to 30.2 inch ridging over lake superior late thursday into 
friday. a 29.4 inch low will develop off the northern rockies late 
friday and extend a 29.7 to 29.9 inch trough to the upper great 
lakes by saturday night.




lsz263-060800-
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 mon oct 5 2026

.late this afternoon...south winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming south 15 to 25 knots late.
a chance of showers. waves building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest 20 to
30 knots in the afternoon, then becoming west 15 to 25 knots
late. waves subsiding to 1 to 3 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves building to 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday night...west winds 15 to 25 knots. waves 3 to 5 feet
occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. waves subsiding to 1 to
3 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots veering southwest.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$