fzus63 kmqt 262001
glfls 
expires:202603270800;;339270

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 26 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...

this afternoon, lake superior is between an elongated 29.7 inch 
trough spanning the southern great lakes basin and a 30.6 inch high 
over alberta. through friday morning, as the low shifts southeast 
away from the region, the high will build to 30.8 inches over the 
north dakota/montana line. this high slowly slides southeast through 
friday and into saturday morning, weakening to 30.6 inches south of 
lake michigan midday saturday. as the high further weakens to 30.5 
inches over thr northern appalachian range late saturday night, 
broad 29.7 inch low pressure develops in the colorado/wyoming area. 
sunday, the high shifts offshore while the low extends a weak 30.0 
inch trough over lake superior sunday evening. by monday afternoon, 
the trough is pushed east by a 30.2 inch high over the 
ontario/manitoba line. tuesday, the high builds to 30.4 inches over 
far northern ontario while low pressure over the northern plains 
deepens to 29.5 inches. the low approaches the great lakes late 
tuesday into wednesday.



lsz162-270800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt thu mar 26 2026 /300 pm cdt thu mar 26 2026/

.late this afternoon...north winds 10 to 20 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...north winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.friday...northwest winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.saturday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots becoming east 15 to
25 knots. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...east winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of rain and snow showers. waves building to
7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 262001
glfls 
expires:202603270800;;339271

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 26 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...

this afternoon, lake superior is between an elongated 29.7 inch 
trough spanning the southern great lakes basin and a 30.6 inch high 
over alberta. through friday morning, as the low shifts southeast 
away from the region, the high will build to 30.8 inches over the 
north dakota/montana line. this high slowly slides southeast through 
friday and into saturday morning, weakening to 30.6 inches south of 
lake michigan midday saturday. as the high further weakens to 30.5 
inches over thr northern appalachian range late saturday night, 
broad 29.7 inch low pressure develops in the colorado/wyoming area. 
sunday, the high shifts offshore while the low extends a weak 30.0 
inch trough over lake superior sunday evening. by monday afternoon, 
the trough is pushed east by a 30.2 inch high over the 
ontario/manitoba line. tuesday, the high builds to 30.4 inches over 
far northern ontario while low pressure over the northern plains 
deepens to 29.5 inches. the low approaches the great lakes late 
tuesday into wednesday.



lsz263-270800-
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-
400 pm edt thu mar 26 2026

.late this afternoon...north winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of snow showers after midnight.
waves subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots increasing to 15 to
25 knots. a slight chance of snow showers through early
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday night...northwest winds 15 to 25 knots backing west late.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots backing east
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...northeast winds 10 to 20 knots backing north
after midnight. waves building to 1 to 3 feet. 
.monday...northeast winds 10 to 20 knots becoming east 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.tuesday...east winds 20 to 30 knots backing northeast. a chance
of rain and snow showers. waves building to 9 to 12 feet
occasionally to 15 feet. 

$$