703 FZUS53 KMQT 182103 NSHMQT Nearshore Marine Forecast National Weather Service Marquette MI 503 PM EDT Mon May 18 2026 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. LMZ221-190800- Green Bay North of line from Cedar River MI to Rock Island Passage- 503 PM EDT Mon May 18 2026 .LATE THIS AFTERNOON...South wind 10 to 15 knots. Mostly cloudy with a slight chance of showers and thunderstorms. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Southeast wind 5 to 15 knots veering south 10 to 15 knots late. Gusts up to 23 knots. Cloudy. A slight chance of showers and thunderstorms through late evening, then a chance of showers and thunderstorms by midnight. Patchy fog through late evening, then areas of dense fog by midnight. Waves building to 2 to 4 feet. .TUESDAY...South wind 15 to 20 knots veering northwest 10 to 15 knots late. Cloudy through early afternoon then becoming partly cloudy. Patchy fog through early afternoon. A chance of showers and a slight chance of thunderstorms through early afternoon, then a slight chance of showers late. Waves subsiding to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind 10 to 15 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast less than 10 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LMZ248-250-190800- Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 503 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...South wind 10 to 15 knots. Cloudy. Patchy fog. Waves 2 to 4 feet. .TONIGHT...South wind 5 to 15 knots increasing to 15 to 20 knots late. Cloudy. A slight chance of showers and thunderstorms through late evening, then a chance of showers and thunderstorms by midnight. Areas of dense fog through the night. Waves subsiding to 2 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Southwest wind 15 to 20 knots veering northwest late. Cloudy. Areas of dense fog through mid morning. Patchy fog by late morning. A chance of showers through mid morning. A slight chance of thunderstorms through early afternoon. A slight chance of showers by late morning. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts up to 22 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Northwest wind 10 to 15 knots veering north 5 to 15 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LSZ240-241-190800- Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- 503 PM EDT Mon May 18 2026 /403 PM CDT Mon May 18 2026/ ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT /4 AM CDT/ TUESDAY THROUGH TUESDAY AFTERNOON... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots backing north late. Patchy fog through the night. Rain showers and a chance of thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest wind 10 to 15 knots backing west 10 to 20 knots by late morning. Cloudy. A chance of rain showers through mid morning. Patchy fog through mid morning. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 5 to 15 knots. Mostly cloudy in the evening then becoming mostly clear. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Northwest wind less than 10 knots in the morning becoming variable. Sunny. Waves 1 to 2 feet. $$ LSZ242-243-190800- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- 503 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .LATE THIS AFTERNOON...Northeast wind 10 to 15 knots. Cloudy. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. Patchy fog through the night. Rain showers and a chance of thunderstorms. Waves building to 2 to 4 feet. .TUESDAY...Northwest wind 15 to 20 knots backing west 10 to 20 knots by late morning. Cloudy. A chance of rain showers through mid morning. Patchy fog through mid morning. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 15 knots. Mostly cloudy in the evening then becoming mostly clear. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Northwest wind less than 10 knots backing southwest in the afternoon. Sunny. Waves 1 to 2 feet. $$ LSZ245-190800- Manitou Island to Point Isabelle MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...North wind 10 to 15 knots. Cloudy. Patchy fog. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TONIGHT...Northeast wind less than 10 knots veering east 10 to 15 knots late. Cloudy. Patchy fog through late evening. Areas of dense fog by midnight. Rain showers and a chance of thunderstorms. Waves building to 2 to 3 feet. .TUESDAY...Northwest wind 10 to 20 knots. Cloudy. A chance of rain showers through mid morning. Patchy fog through mid morning. Waves building to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly clear. Waves subsiding to 2 to 3 feet. .WEDNESDAY...Northwest wind 5 to 15 knots backing west less than 10 knots in the afternoon. Sunny. Waves subsiding to 1 to 2 feet. $$ LSZ244-190800- Eagle River to Manitou Island MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...North wind less than 10 knots. Cloudy. Patchy fog. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots veering east by midnight. Patchy fog through late evening. Areas of dense fog by midnight. Patchy fog late. Rain showers and a chance of thunderstorms. Waves building to 2 to 4 feet. .TUESDAY...Northwest wind 15 to 20 knots. Cloudy. Patchy fog through mid morning. A chance of rain showers through mid morning, then a slight chance of rain showers by late morning. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Partly cloudy. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northwest wind 5 to 15 knots backing west less than 10 knots in the afternoon. Sunny. Waves subsiding to 1 to 2 feet. $$ LSZ246-190800- Point Isabelle to Lower Entrance of Portage Canal MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT TUESDAY... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 15 knots. Patchy dense fog through the night. Rain showers and a chance of thunderstorms. Waves 1 to 2 feet. .TUESDAY...West wind 10 to 20 knots. Cloudy. A chance of rain showers through mid morning. Patchy fog through mid morning. Waves building to 2 to 3 feet, then subsiding to 1 to 2 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind less than 10 knots veering northeast in the afternoon. Mostly sunny. Waves calm to 1 foot. $$ LSZ247-190800- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT TUESDAY... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 15 knots. Patchy fog through the night. Rain showers and a chance of thunderstorms. Waves 1 to 2 feet. .TUESDAY...West wind 10 to 20 knots. Cloudy. A chance of rain showers through mid morning. Patchy fog through mid morning. Waves building to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. .WEDNESDAY...Northwest wind less than 10 knots in the morning becoming variable. Mostly sunny. Waves 1 to 2 feet. $$ LSZ248-190800- Huron Islands to Marquette MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy with a slight chance of showers and thunderstorms. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind less than 10 knots veering southeast 10 to 15 knots late. Cloudy with a chance of showers and thunderstorms. Patchy fog. Waves 1 to 2 feet. .TUESDAY...West wind 10 to 20 knots veering northwest 15 to 25 knots by late morning. Mostly cloudy. Patchy fog through mid morning. A chance of rain showers through mid morning, then a slight chance of rain showers by late morning. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy in the evening then clearing. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northwest wind 10 to 15 knots veering northeast less than 10 knots in the afternoon. Mostly sunny. Waves subsiding to 1 to 2 feet. $$ LSZ249-190800- Marquette to Munising MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...North wind less than 10 knots. Cloudy with a slight chance of showers and thunderstorms. Patchy fog. Waves calm to 1 foot. .TONIGHT...North wind less than 10 knots veering east by midnight, then veering south 10 to 15 knots late. Cloudy. Patchy fog through the night. A chance of rain showers in the evening. A chance of thunderstorms through the night. Rain showers likely after midnight. Waves building to 1 to 2 feet. .TUESDAY...Southwest wind 10 to 20 knots veering northwest 20 to 25 knots by late morning. Mostly cloudy. Patchy fog through mid morning. A chance of rain showers and a slight chance of thunderstorms through mid morning, then a slight chance of rain showers by late morning. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest wind 15 to 20 knots veering north 5 to 15 knots in the afternoon. Sunny. Waves subsiding to 1 to 2 feet. $$ LSZ250-190800- Munising to Grand Marais MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy. Patchy fog. Waves calm to 1 foot. .TONIGHT...Northeast wind less than 10 knots veering south 10 to 15 knots with gusts up to 22 knots late. Cloudy. Patchy fog through the night. A chance of rain showers in the evening. A chance of thunderstorms through the night. Rain showers likely after midnight. Waves building to 1 to 2 feet. .TUESDAY...Southwest wind 15 to 20 knots veering northwest 20 to 25 knots late. Mostly cloudy. A chance of rain showers and a slight chance of thunderstorms through early afternoon. Patchy fog through early afternoon. Waves building to 5 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots with gusts up to 27 knots. Mostly cloudy. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...Northwest wind 15 to 20 knots diminishing to 5 to 15 knots in the afternoon. Partly cloudy in the morning then clearing. Waves subsiding to 2 to 3 feet. $$ LSZ251-190800- Grand Marais to Whitefish Point MI- 503 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...Northeast wind less than 10 knots. Cloudy. Areas of dense fog. Waves calm to 1 foot. .TONIGHT...East wind less than 10 knots veering south 10 to 15 knots with gusts up to 22 knots late. Cloudy. Areas of dense fog through the night. A chance of showers and thunderstorms by midnight. Rain showers likely and a chance of thunderstorms late. Waves building to 1 to 2 feet. .TUESDAY...South wind 15 to 20 knots veering west 20 to 25 knots late. Cloudy. Patchy fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms through early afternoon, then a slight chance of rain showers late. Waves building to 5 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...Northwest wind 20 to 25 knots. Partly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet, then building to 5 to 8 feet occasionally to 10 feet. .WEDNESDAY...Northwest wind 10 to 20 knots. Partly cloudy in the morning then clearing. Waves subsiding to 2 to 4 feet. $$ WFO MQT