Coastal Waters Forecast for Ontonagon to Upper Entrance of Portage Canal MI (LSZ242) (Text-Only)
NWS Forecast for: Ontonagon to Upper Entrance of Portage Canal MI (LSZ242)
Issued by: National Weather Service Marquette, MI
Last Update: 1101 PM EDT Sun Sep 6 2026


Rest Of Tonight: Southeast wind less than 10 knots veering south late. Mostly cloudy. Waves calm to 1 foot.

Monday: South wind less than 10 knots backing northeast by late morning. Gusts up to 17 knots. Mostly cloudy. Waves calm to 1 foot.

Monday Night: Southeast wind 10 to 15 knots veering south 10 to 20 knots after midnight. Gusts up to 29 knots. Cloudy. A slight chance of showers in the evening, then showers after midnight. Waves building to 1 to 2 feet.

Tuesday: South wind 10 to 20 knots with gusts up to 30 knots. Cloudy. Showers and a slight chance of thunderstorms in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon. Waves building to 2 to 3 feet, then subsiding to 1 to 2 feet.







Zone Forecast: Ontonagon to Upper Entrance of Portage Canal MI (LSZ242)

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