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: 311 PM CST Thu Nov 13 2025


Tonight: Northwest wind 5 to 10 knots becoming east after midnight. Mostly clear in the evening then becoming mostly cloudy. Waves 1 to 2 feet.

Friday: Southeast wind 10 to 15 knots with gusts to around 20 knots becoming southeast 10 to 15 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet.

Friday Night: South wind 5 to 10 knots becoming southwest with gusts to around 20 knots in the late evening and overnight. Chance of rain after midnight. Waves 1 to 3 feet.

Saturday: Northwest wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots in the afternoon. Chance of rain in the morning. Waves 1 to 3 feet.







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

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