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| 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: 1001 AM EDT Mon Jul 20 2026 | |
| Rest Of Today: Southwest winds 20 to 30 knots. Patchy smoke by late morning. A slight chance of showers and thunderstorms by mid afternoon. Some thunderstorms may be severe. Waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet occasionally to 8 feet. Tonight: West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Patchy smoke through midnight. A slight chance of thunderstorms through midnight. A slight chance of showers. Some thunderstorms may be severe. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. Tuesday: Northwest winds 20 to 30 knots veering north in the afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. Tuesday Night: Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. Wednesday: West winds 5 to 15 knots becoming southwest 10 to 20 knots by mid afternoon. Waves building to 1 to 3 feet. Wednesday Night: Southwest winds 10 to 20 knots veering west after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. Thursday: Southwest winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. Friday: 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) | |
Visit your local NWS office at: https://www.weather.gov/mqt/ |