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: 503 PM EDT Mon May 11 2026
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Late This Afternoon: Variable wind less than 10 knots. Sunny. Waves calm to 1 foot.

Tonight: East wind less than 10 knots veering south 10 to 20 knots by midnight. Mostly clear through midnight then becoming mostly cloudy. Waves building to 1 to 2 feet.

Tuesday: Southeast wind 15 to 20 knots with gusts up to 29 knots. A chance of rain showers through mid morning, then rain showers by late morning. Waves building to 2 to 4 feet, then subsiding to 1 to 2 feet.

Tuesday Night: Southeast wind 10 to 15 knots backing north 15 to 25 knots after midnight. A chance of rain showers in the evening, then rain showers likely possibly mixed with snow showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet.

Wednesday: Northwest wind 20 to 25 knots. Mostly cloudy. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.







Zone Forecast: Munising to Grand Marais MI (LSZ250)

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