Coastal Waters Forecast for Grand Portage to Grand Marais MN (LSZ140) (Text-Only)
NWS Forecast for: Grand Portage to Grand Marais MN (LSZ140)
Issued by: National Weather Service Duluth, MN
Last Update: 1222 AM CST Sat Jan 17 2026
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Today: North wind 20 to 25 knots. Gusts up to 30 knots decreasing to 25 knots in the afternoon. Slight chance of snow through the day. Waves 1 to 3 feet.

Tonight: Northwest wind 10 to 15 knots. Gusts up to 20 knots in the evening. Slight chance of snow after midnight. Waves 1 to 2 feet.

Sunday: West wind 15 to 20 knots with gusts to around 25 knots. Snow likely in the morning, then snow in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the afternoon.

Sunday Night: Northwest wind up to 30 knots. Gusts up to 35 knots increasing to 40 knots after midnight. Slight chance of snow in the evening. Waves 4 to 6 feet. Waves occasionally to 7 feet. A gale warning may be needed.

note...wave height forecasts are for ice free areas.







Zone Forecast: Grand Portage to Grand Marais MN (LSZ140)

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