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: 834 AM CST Mon Jan 19 2026




Rest Of Today: Northwest wind 20 to 25 knots easing to 15 to 20 knots in the afternoon. Gusts up to 20 knots early in the afternoon increasing to 25 knots. Mostly sunny early in the morning then becoming mostly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the afternoon.

Tonight: Northwest wind 15 to 20 knots. Gusts up to 25 knots in the evening. Chance of flurries. Waves 1 to 3 feet.

Tuesday: West wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots in the late morning and afternoon. Partly sunny. Waves 1 to 2 feet.

Tuesday Night: West wind 10 to 15 knots. Gusts up to 20 knots in the evening. Mostly cloudy. Waves 1 to 2 feet.

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







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

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