Coastal Waters Forecast for Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park (LSZ263) (Text-Only)
NWS Forecast for: Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park (LSZ263)
Issued by: National Weather Service Marquette, MI
Last Update: 401 PM EDT Mon Sep 1 2025
Print


Late This Afternoon: Southwest winds 5 to 15 knots. Waves calm to 2 feet.

Tonight: South winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet.

Tuesday: Southwest winds 5 to 15 knots. A chance of showers. A slight chance of thunderstorms by mid afternoon. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

Tuesday Night: Southwest winds 5 to 15 knots becoming west 10 to 20 knots after midnight, then becoming northwest 15 to 25 knots late. Showers and a chance of thunderstorms. Waves building to 2 to 4 feet.

Wednesday: North winds 15 to 25 knots backing northwest by mid afternoon. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet.

Wednesday Night: Northwest winds 15 to 25 knots. A chance of showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

Thursday: Northwest winds 15 to 25 knots becoming west 10 to 20 knots by mid afternoon. A chance of showers. Waves subsiding to 2 to 4 feet.

Thursday Night: West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.

Friday: Northwest winds 15 to 25 knots. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet.

Saturday: Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves subsiding to calm to 2 feet.







Zone Forecast: Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park (LSZ263)

Visit your local NWS office at: https://www.weather.gov/mqt/