Last Update: 1001 PM EDT Tue May 19 2026

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Marquette, MI Local Forecast Office

30NM SE Grand Portage MN

Marine Zone Forecast

Rest Of Tonight
Northwest winds 5 to 15 knots. Waves 2 to 4 feet subsiding to calm to 2 feet.
Wednesday
Northwest winds 5 to 15 knots backing southwest in the afternoon. Waves calm to 2 feet.
Wednesday Night
Southeast winds 5 to 15 knots veering south late. Waves calm to 2 feet.
Thursday
South winds 5 to 15 knots backing east 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
East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves building to 2 to 4 feet.
Friday Night
East winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
Saturday
East winds 5 to 15 knots. A chance of rain showers. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
Sunday
Southwest winds 5 to 15 knots backing south. Waves calm to 2 feet.



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1001 PM EDT Tue May 19 2026
 
 

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