| NWS Forecast for: Grand Portage to Grand Marais MN (LSZ140) Issued by: National Weather Service Duluth, MN Last Update: 501 PM CDT Mon May 18 2026 |  |
Tonight: Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots late in the night. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. Tuesday: Northwest wind 10 to 15 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots in the afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. Tuesday Night: Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. Wednesday: Northwest wind 5 to 10 knots becoming south 10 to 15 knots with gusts to around 20 knots in the afternoon. Sunny. Waves 1 to 2 feet. | |
| Zone Forecast: Grand Portage to Grand Marais MN (LSZ140) | |
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