fzus63 kmqt 190801
glfls 
expires:202610192000;;353133

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

this morning, lake superior is between a 30.6 inch high over nova 
scotia, a 30.3 inch high over north dakota, and a 29.3 inch low over 
hudson bay. throughout the day today, all features march east, with 
the plains high shifting over lake superior at 30.4 inches. 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.




lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt mon oct 19 2026 /300 am cdt mon oct 19 2026/

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...north winds 5 to 15 knots veering northeast in the
afternoon, then increasing to 10 to 20 knots late. 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...south 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 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots becoming south 15 to
25 knots. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202610192000;;353134

open lake forecast for lake superior
national weather service marquette mi
400 am 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...

this morning, lake superior is between a 30.6 inch high over nova 
scotia, a 30.3 inch high over north dakota, and a 29.3 inch low over 
hudson bay. throughout the day today, all features march east, with 
the plains high shifting over lake superior at 30.4 inches. 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.




lsz263-192000-
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 am edt mon oct 19 2026

.early this morning...northwest winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...northwest winds 5 to 15 knots veering northeast in the
afternoon. 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 5 to 15 knots veering west 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 5 to 15 knots veering southeast. waves
calm to 2 feet. 
.friday...south winds 10 to 20 knots increasing to 20 to
30 knots. waves building to 2 to 4 feet. 

$$