| NWS Forecast for: Grand Portage to Grand Marais MN (LSZ140) Issued by: National Weather Service Duluth, MN Last Update: 1100 PM CDT Sun Sep 13 2026 |  |
Rest Of Tonight: Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. Monday: Southwest wind 5 knots becoming south 10 to 15 knots with gusts to around 20 knots in the late morning and early afternoon, then becoming southeast with gusts to around 20 knots late in the afternoon. Sunny in the morning then becoming mostly cloudy. Waves 1 to 2 feet. Monday Night: South wind 20 to 25 knots with gales to around 35 knots becoming southwest with gales to around 35 knots early in the morning. Rain showers in the evening, then rain showers likely after midnight. Waves 2 to 4 feet building to 4 to 7 feet in the late evening and overnight. Waves occasionally to 9 feet. A gale warning may be needed. Tuesday: West wind up to 30 knots. Gales up to 40 knots decreasing to 35 knots late in the afternoon. Mostly sunny. Waves 6 to 9 feet subsiding to 4 to 7 feet late in the afternoon. Waves occasionally to 12 feet. A gale warning may be needed. | |
| Zone Forecast: Grand Portage to Grand Marais MN (LSZ140) | |
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