fzus63 kmqt 192001
glfls 
expires:202610200800;;847582

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon oct 19 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...

a 30.4 inch high will remain over lake superior through tonight and 
then shift east on tuesday. this high builds further to 30.5 inches 
over western quebec tuesday afternoon as a 29.9 inch low moves from 
northern manitoba into western hudson bay. wednesday morning, the 
high weakens lightly to 30.4 inches but expands over much of 
southern quebec while the low deepens to 29.7 inches over eastern 
hudson bay. meanwhile, a 30.3 inch high moves over the north 
dakota/manitoba/saskatchewan tripoint. with the low moving across 
northern quebec, the highs merge into a 30.3 inch high over the 
upper great lakes by thursday morning. by friday afternoon, the high 
builds to 30.5 inches over the ontario/quebec line as a 29.4 inch 
low moves into eastern montana. saturday afternoon, the high builds 
further to 30.6 inches over new england as the 29.4 inch low 
approaches lake winnipeg.




lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt mon oct 19 2026 /300 pm cdt mon oct 19 2026/

.late this afternoon...northeast winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots increasing
to 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots becoming south 15 to 25 knots.
waves building to 1 to 3 feet. 
.saturday...south winds 20 to 30 knots veering southwest. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202610200800;;847583

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon oct 19 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...

a 30.4 inch high will remain over lake superior through tonight and 
then shift east on tuesday. this high builds further to 30.5 inches 
over western quebec tuesday afternoon as a 29.9 inch low moves from 
northern manitoba into western hudson bay. wednesday morning, the 
high weakens lightly to 30.4 inches but expands over much of 
southern quebec while the low deepens to 29.7 inches over eastern 
hudson bay. meanwhile, a 30.3 inch high moves over the north 
dakota/manitoba/saskatchewan tripoint. with the low moving across 
northern quebec, the highs merge into a 30.3 inch high over the 
upper great lakes by thursday morning. by friday afternoon, the high 
builds to 30.5 inches over the ontario/quebec line as a 29.4 inch 
low moves into eastern montana. saturday afternoon, the high builds 
further to 30.6 inches over new england as the 29.4 inch low 
approaches lake winnipeg.




lsz263-200800-
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 mon oct 19 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast late. waves
calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.friday...southeast winds 5 to 15 knots becoming south 15 to
25 knots. waves building to 2 to 4 feet. 
.saturday...south winds 20 to 30 knots veering southwest. waves
building to 3 to 6 feet occasionally to 8 feet. 

$$