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 Thu Jul 17 2025
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Late This Afternoon: Southwest winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet.

Tonight: Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

Friday: Southwest winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet.

Friday Night: Southwest winds 5 to 15 knots becoming east less than 10 knots late. A chance of showers. A slight chance of thunderstorms after midnight. Waves calm to 2 feet.

Saturday: North winds 5 to 15 knots backing southwest by mid afternoon. A slight chance of showers through early afternoon. Waves calm to 2 feet.

Saturday Night: West winds 5 to 15 knots diminishing to less than 10 knots after midnight. Waves calm to 2 feet.

Sunday: East winds less than 10 knots increasing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet.

Sunday Night: East winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet.

Monday: East winds 5 to 15 knots veering south. A chance of showers. Waves calm to 2 feet.

Tuesday: South winds 5 to 15 knots veering southwest. 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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