Chart / Forecasts

Ontonagon to Upper Entrance of Portage Canal MI

LSZ242 · Nearshore Marine Forecast · National Weather Service Marquette MI · Issued 502 PM EDT Sat Oct 3 2026
Small Craft Advisory In Effect Through Late Sunday Night
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Forecast
Late This Afternoon
South wind 10 to 15 knots with gusts up to 22 knots. Cloudy with a chance of showers. Waves calm to 1 foot.
Tonight
South wind 15 to 20 knots veering northwest 20 to 25 knots late. Cloudy. Showers through midnight, then a slight chance of showers late. Waves building to 3 to 6 feet occasionally to 8 feet.
Sunday
Northwest wind 15 to 25 knots. Mostly sunny. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
Sunday Night
Northwest wind 15 to 20 knots with gusts up to 29 knots. Clear. Waves subsiding to 2 to 4 feet.
Monday
Northwest wind 5 to 15 knots backing west less than 10 knots in the afternoon. Sunny. Waves subsiding to 1 to 2 feet.
Source: National Weather Service Nearshore Marine Forecast (NSH), issued 502 PM EDT Sat Oct 3 2026, valid until Sun, 04 Oct 2026 08:00 UTC. Original text · All zones