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 Sun Sep 20 2026


Late This Afternoon: Northeast winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet.

Tonight: Northeast winds 15 to 25 knots becoming east 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

Monday: East winds 5 to 15 knots increasing to 15 to 25 knots. Waves building to 1 to 3 feet.

Monday Night: East winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

Tuesday: East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet.

Tuesday Night: East winds 10 to 20 knots becoming southeast 5 to 15 knots after midnight. Waves calm to 2 feet.

Wednesday: Southeast winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet.

Wednesday Night: Southeast winds 10 to 20 knots veering south after midnight. Waves calm to 2 feet.

Thursday: South winds 5 to 15 knots. Waves calm to 2 feet.

Friday: South winds 5 to 15 knots backing southeast. Waves 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)

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