Latest Great Lakes Marine Forecast by KMQT
Issued 7/29/2026 10:01 PM America/New_York.
Valid through 7/30/2026 4:00 AM America/New_York.
fzus63 kmqt 300201
glfls
expires:202607300800;;308030
open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed jul 29 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...
weak ridging near 30.0 inches remains over lake superior through
thursday morning. weak troughing of 28.8 to 29.9 inches moves over
the lake thursday afternoon through early friday. ridging of 30.0 to
30.1 inches returns this weekend into early next week.
lsz162-300800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed jul 29 2026 /901 pm cdt wed jul 29 2026/
.rest of tonight...east winds less than 10 knots increasing to
5 to 15 knots after midnight, then veering south late. a slight
chance of showers and thunderstorms after midnight. waves calm to
2 feet.
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of showers. a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet.
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet.
.friday...west winds 5 to 15 knots backing southwest by mid
afternoon. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet.
.friday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet.
.saturday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.saturday night...northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet.
.sunday...northeast winds 10 to 20 knots becoming east 5 to
15 knots. waves calm to 2 feet.
.monday...east winds 10 to 20 knots veering southwest. a chance
of showers. waves calm to 2 feet.
$$
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