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Grand Portage to Grand Marais MN Marine Forecast

Updated 2:43am CDT Aug 27, 2026
Zone Map
Today
Northwest wind 5 to 10 knots becoming southwest early in the afternoon, then becoming southeast late in the afternoon.
Tonight
East wind 5 knots becoming north in the late evening and overnight. Chance of sprinkles in the evening. Waves 1 foot or less.
Friday
North wind 5 knots becoming southeast late in the morning, then becoming south with gusts to around 20 knots in the afternoon. Mostly sunny. Waves 1 foot or less.
Friday Night
Southwest wind 5 to 10 knots becoming north early in the morning. Mostly cloudy. Waves 1 foot or less.