fzus63 kmqt 261401
glfls 
expires:202603262000;;324947

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 morning, lake superior is between an elongated 29.7 inch trough 
spanning the southern great lakes basin and a 30.7 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.



lsz162-262000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu mar 26 2026 /900 am cdt thu mar 26 2026/

.rest of today...northeast winds 10 to 20 knots. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight, then veering northeast late. a slight chance of snow
showers after midnight. waves subsiding to calm to 2 feet. 
.friday...north winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a slight chance of snow showers. waves building to 2 to
4 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...east winds 10 to 20 knots backing north. waves calm to
2 feet. 
.monday...north winds 10 to 20 knots becoming east 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 261401
glfls 
expires:202603262000;;324948

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 morning, lake superior is between an elongated 29.7 inch trough 
spanning the southern great lakes basin and a 30.7 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.



lsz263-262000-
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-
1000 am edt thu mar 26 2026

.rest of today...northeast winds 10 to 20 knots. a slight chance
of snow showers by late morning. waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 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...north winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a slight chance of snow showers. waves building to 2 to
4 feet. 
.friday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. 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. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots becoming north 10 to 20 knots.
waves building to 2 to 4 feet. 
.monday...north winds 10 to 20 knots becoming east 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$