Coastal Waters Forecast for Munising to Grand Marais MI (LSZ250) (Text-Only)
NWS Forecast for: Munising to Grand Marais MI (LSZ250)
Issued by: National Weather Service Marquette, MI
Last Update: 501 AM EDT Tue Aug 18 2026
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Early This Morning: Southwest wind 10 to 15 knots. Cloudy with a chance of showers and a slight chance of thunderstorms. Waves 1 to 2 feet.

Today: West wind 10 to 15 knots veering northwest 5 to 15 knots by late morning. Gusts up to 22 knots. Partly cloudy. A slight chance of showers and thunderstorms through early afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 2 feet.

Tonight: West wind less than 10 knots backing southwest 10 to 15 knots by midnight, then veering west late. Clear. Waves 1 to 2 feet.

Wednesday: Northwest wind 10 to 15 knots veering north less than 10 knots in the afternoon. Sunny. Waves 1 to 2 feet.

Wednesday Night: Variable wind less than 10 knots becoming south less than 10 knots after midnight. Mostly clear. Waves calm to 1 foot.







Zone Forecast: Munising to Grand Marais MI (LSZ250)

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