Nearshore Marine Forecast
Issued by NWS Marquette, MI
Issued by NWS Marquette, MI
640 FZUS53 KMQT 042102 NSHMQT Nearshore Marine Forecast National Weather Service Marquette MI 502 PM EDT Thu Sep 4 2025 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LMZ221-050800- Green Bay North of line from Cedar River MI to Rock Island Passage- 502 PM EDT Thu Sep 4 2025 ...GALE WARNING IN EFFECT FROM 2 AM EDT FRIDAY THROUGH FRIDAY MORNING... ...Small craft should exercise caution from this afternoon through late tonight... .LATE THIS AFTERNOON...Southwest wind 15 to 20 knots. Mostly cloudy. Waves 2 to 4 feet. .TONIGHT...Southwest wind 15 to 20 knots becoming 15 to 25 knots with gale force gusts up to 39 knots by midnight, then increasing to up to 30 knots with gale force gusts up to 39 knots late. A slight chance of showers through late evening, then showers and a slight chance of thunderstorms by midnight. Waves building to 6 to 9 feet occasionally to 11 feet. .FRIDAY...West wind up to 30 knots with gale force gusts up to 37 knots. Mostly cloudy. A slight chance of waterspouts through mid morning. A chance of showers through early afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet, then building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West wind 15 to 25 knots. Partly cloudy. Waves subsiding to 2 to 3 feet. .SATURDAY...West wind 5 to 15 knots. Mostly cloudy with a slight chance of showers. Waves subsiding to 1 to 2 feet. $$ LMZ248-250-050800- Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY... ...GALE WARNING IN EFFECT FROM 2 AM EDT FRIDAY THROUGH FRIDAY MORNING... .LATE THIS AFTERNOON...Southwest wind 15 to 20 knots. Mostly cloudy. Waves 2 to 4 feet. .TONIGHT...Southwest wind 15 to 20 knots increasing to up to 30 knots with gale force gusts up to 41 knots by midnight. A slight chance of showers through late evening, then showers and a chance of thunderstorms by midnight. A slight chance of waterspouts late. Waves building to 9 to 12 feet occasionally to 15 feet. .FRIDAY...West wind up to 30 knots with gale force gusts up to 38 knots. Mostly cloudy. Showers likely and a slight chance of thunderstorms through mid morning, then a chance of showers by late morning. A slight chance of showers late. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West wind 15 to 25 knots. Partly cloudy. Waves subsiding to 2 to 3 feet. .SATURDAY...West wind 5 to 15 knots. Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Waves subsiding to 1 to 2 feet. $$ LSZ240-050800- Saxon Harbor WI to Black River MI- 502 PM EDT Thu Sep 4 2025 /402 PM CDT Thu Sep 4 2025/ ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...Southwest wind 15 to 20 knots. Mostly cloudy with a slight chance of showers. Waves 2 to 3 feet. .TONIGHT...Southwest wind 10 to 20 knots veering northwest less than 10 knots by midnight, then increasing to 15 to 25 knots late. Showers likely and a slight chance of thunderstorms. A slight chance of waterspouts late. Waves subsiding to 1 to 2 feet, then building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West wind 20 to 25 knots with gusts up to 33 knots. A slight chance of waterspouts through mid morning. Cloudy with a chance of showers. Waves building to 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...Northwest wind 15 to 25 knots with gusts up to 32 knots. Cloudy. A slight chance of showers in the evening. Waves subsiding to 2 to 4 feet. .SATURDAY...Northwest wind 10 to 15 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ241-050800- Black River to Ontonagon MI- 502 PM EDT Thu Sep 4 2025 /402 PM CDT Thu Sep 4 2025/ ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 15 to 20 knots. Mostly cloudy with a slight chance of showers. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TONIGHT...Southwest wind 10 to 20 knots veering northwest 15 to 25 knots late. Showers likely and a slight chance of thunderstorms. Waves subsiding to 1 to 2 feet, then building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West wind up to 30 knots. A slight chance of waterspouts through mid morning. Showers likely. Waves building to 7 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...Northwest wind up to 30 knots diminishing to 15 to 20 knots after midnight. Cloudy. A slight chance of showers in the evening. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ242-243-050800- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 20 to 25 knots. Mostly cloudy. Waves 5 to 8 feet occasionally to 10 feet. .TONIGHT...Southwest wind 10 to 20 knots veering northwest late. Cloudy. A chance of showers and a slight chance of thunderstorms through midnight, then showers likely and a slight chance of thunderstorms late. Waves subsiding to 2 to 3 feet, then building to 2 to 4 feet. .FRIDAY...Northwest wind up to 30 knots with gale force gusts up to 37 knots. Cloudy with a chance of showers. Waves building to 8 to 11 feet occasionally to 14 feet. .FRIDAY NIGHT...Northwest wind up to 30 knots with gale force gusts up to 37 knots. Cloudy. A slight chance of showers in the evening. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 2 to 3 feet. $$ LSZ245-050800- Manitou Island to Point Isabelle MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 15 to 25 knots. Mostly cloudy. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TONIGHT...Southwest wind 10 to 20 knots veering west late. Cloudy. A chance of showers and a slight chance of thunderstorms through late evening, then showers likely and a slight chance of thunderstorms by midnight. Waves subsiding to 1 to 2 feet. .FRIDAY...Northwest wind 20 to 25 knots backing west late. Gusts up to 33 knots. Cloudy. Showers likely through mid morning, then a chance of showers by late morning. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...Northwest wind 15 to 25 knots with gusts up to 33 knots. Mostly cloudy. A slight chance of showers in the evening. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest wind 10 to 15 knots with gusts up to 23 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ244-050800- Eagle River to Manitou Island MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 20 to 25 knots. Mostly cloudy. Waves 5 to 8 feet occasionally to 10 feet. .TONIGHT...Southwest wind 10 to 20 knots veering northwest late. Cloudy. A chance of showers in the evening. A slight chance of thunderstorms through the night. Showers likely after midnight. Waves subsiding to 2 to 3 feet, then building to 2 to 4 feet. .FRIDAY...Northwest wind up to 30 knots backing west late. Cloudy with a chance of showers. Waves building to 7 to 10 feet occasionally to 13 feet. .FRIDAY NIGHT...Northwest wind up to 30 knots. Cloudy. A slight chance of showers in the evening. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .SATURDAY...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 2 to 3 feet. $$ LSZ246-050800- Point Isabelle to Lower Entrance of Portage Canal MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 15 to 20 knots. Mostly cloudy. Waves 2 to 3 feet. .TONIGHT...Southwest wind 10 to 15 knots veering west 5 to 15 knots late. Gusts up to 23 knots. Cloudy. A slight chance of showers and thunderstorms through late evening, then showers likely and a slight chance of thunderstorms by midnight. A slight chance of waterspouts late. Waves subsiding to 1 to 2 feet. .FRIDAY...Northwest wind 15 to 25 knots backing west 20 to 25 knots late. Gale force gusts up to 35 knots. Cloudy with a chance of showers. Waves building to 2 to 3 feet. .FRIDAY NIGHT...West wind 10 to 20 knots with gale force gusts up to 34 knots. Mostly cloudy. A chance of showers in the evening, then a slight chance of showers after midnight. Waves subsiding to 1 to 2 feet. .SATURDAY...Northwest wind 5 to 15 knots with gusts up to 24 knots. Mostly cloudy. Waves calm to 1 foot. $$ LSZ247-050800- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 15 to 20 knots. Mostly cloudy. Waves 2 to 4 feet subsiding to 2 to 3 feet. .TONIGHT...Southwest wind 10 to 15 knots veering west 10 to 20 knots late. Cloudy. A slight chance of showers through late evening, then showers and a slight chance of thunderstorms by midnight. Waves subsiding to 1 to 2 feet. .FRIDAY...West wind 15 to 25 knots becoming 20 to 25 knots late. Gale force gusts up to 36 knots. Showers likely. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY NIGHT...West wind 15 to 25 knots with gale force gusts up to 35 knots. Cloudy. A chance of rain showers in the evening, then a slight chance of rain showers after midnight. Waves subsiding to 1 to 2 feet. .SATURDAY...Northwest wind 10 to 15 knots with gusts up to 24 knots. Mostly cloudy. A slight chance of showers in the morning. Waves 1 to 2 feet. $$ LSZ248-050800- Huron Islands to Marquette MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...West wind 10 to 20 knots. Mostly cloudy. Waves 2 to 4 feet subsiding to 2 to 3 feet. .TONIGHT...Southwest wind 10 to 15 knots veering northwest 10 to 20 knots late. A slight chance of showers through late evening, then a chance of showers by midnight. Showers and a slight chance of thunderstorms late. Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet. .FRIDAY...Northwest wind 20 to 25 knots backing west by late morning. Gale force gusts up to 36 knots. A slight chance of waterspouts through mid morning. Showers likely through early afternoon, then a chance of showers late. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West wind 15 to 25 knots with gale force gusts up to 35 knots. Mostly cloudy. A chance of showers in the evening, then a slight chance of showers after midnight. Waves subsiding to 2 to 4 feet. .SATURDAY...Northwest wind 10 to 15 knots with gusts up to 24 knots. Mostly cloudy with a slight chance of showers. Waves subsiding to 1 to 2 feet. $$ LSZ249-050800- Marquette to Munising MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...Southwest wind 10 to 15 knots. Mostly cloudy. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TONIGHT...Southwest wind 10 to 20 knots. A slight chance of showers through late evening. Showers by midnight. A slight chance of thunderstorms late. A slight chance of waterspouts late. Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet. .FRIDAY...Northwest wind up to 30 knots backing west 20 to 25 knots by late morning. A slight chance of waterspouts through mid morning. A slight chance of thunderstorms through mid morning. Showers through early afternoon, then a chance of showers late. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West wind 15 to 25 knots. Mostly cloudy. A chance of showers in the evening, then a slight chance of showers after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest wind 10 to 15 knots. Mostly cloudy with a slight chance of showers. Waves subsiding to 2 to 3 feet. $$ LSZ250-050800- Munising to Grand Marais MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...Southwest wind 15 to 20 knots. Mostly cloudy with a slight chance of showers. Waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet occasionally to 8 feet. .TONIGHT...Southwest wind 10 to 15 knots backing south late. A slight chance of showers through late evening. Showers by midnight. A slight chance of thunderstorms late. A slight chance of waterspouts late. Waves subsiding to 1 to 2 feet. .FRIDAY...Northwest wind up to 30 knots backing west by late morning. A slight chance of waterspouts through mid morning. Showers and a slight chance of thunderstorms through mid morning, then showers by late morning. Waves building to 8 to 11 feet occasionally to 14 feet. .FRIDAY NIGHT...West wind up to 30 knots. Cloudy with a chance of showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY...Northwest wind 10 to 15 knots. Mostly cloudy. A chance of showers in the morning, then a slight chance of showers in the afternoon. Waves subsiding to 2 to 4 feet. $$ LSZ251-050800- Grand Marais to Whitefish Point MI- 502 PM EDT Thu Sep 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING... .LATE THIS AFTERNOON...Southwest wind 15 to 20 knots. Mostly cloudy with a slight chance of showers. Waves 5 to 8 feet occasionally to 10 feet subsiding to 4 to 7 feet occasionally to 9 feet. .TONIGHT...Southwest wind 10 to 15 knots backing south 10 to 20 knots with gusts up to 31 knots late. Showers likely by midnight. Showers and a slight chance of thunderstorms late. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West wind up to 30 knots. Showers and a slight chance of thunderstorms through mid morning, then showers by late morning. Waves building to 8 to 11 feet occasionally to 14 feet. .FRIDAY NIGHT...West wind 15 to 25 knots with gusts up to 32 knots. Cloudy. Showers likely in the evening, then a chance of showers after midnight. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY...Northwest wind 10 to 15 knots. Mostly cloudy with a chance of showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. $$ WFO MQT