431 FZUS53 KMQT 180907 NSHMQT Nearshore Marine Forecast National Weather Service Marquette MI 506 AM 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. LMZ221-182000- Green Bay North of line from Cedar River MI to Rock Island Passage- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...Southeast wind 10 to 15 knots. Thunderstorms likely and a chance of rain showers. Areas of dense fog. Waves 2 to 3 feet. .TODAY...South wind 10 to 15 knots with gusts up to 22 knots. Cloudy. Areas of dense fog through mid morning. Patchy fog by late morning. A slight chance of thunderstorms through mid morning. A chance of showers through the day. A slight chance of thunderstorms late. Waves 2 to 3 feet. .TONIGHT...South wind 10 to 20 knots. Gusts up to 28 knots after midnight. Cloudy. A chance of showers and a slight chance of thunderstorms through late evening, then a chance of showers and thunderstorms by midnight. Patchy fog through late evening. Areas of dense fog by midnight. Waves subsiding to 1 to 2 feet, then building to 2 to 4 feet. .TUESDAY...Southwest wind 15 to 20 knots veering northwest in the afternoon. Patchy dense fog in the morning. Cloudy with a chance of showers in the morning, then partly cloudy with a slight chance of showers in the afternoon. 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. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LMZ248-250-182000- Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .EARLY THIS MORNING...Southeast wind 10 to 15 knots. Cloudy with a chance of showers and thunderstorms. Patchy dense fog. Waves 2 to 3 feet. .TODAY...South wind 15 to 20 knots. Cloudy. Patchy dense fog through the day. A chance of showers and a slight chance of thunderstorms through mid morning. A slight chance of showers by late morning. A slight chance of thunderstorms late. Waves building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...South wind 10 to 15 knots with gusts up to 30 knots increasing to 15 to 25 knots late. Cloudy. Areas of dense fog through the night. A chance of showers in the evening. A chance of thunderstorms through the night. Showers likely after midnight. Waves subsiding to 2 to 4 feet, then building to 4 to 7 feet occasionally to 9 feet. .TUESDAY...Southwest wind 20 to 25 knots veering northwest 15 to 20 knots in the afternoon. Cloudy in the morning then becoming partly cloudy. Areas of dense fog in the morning. A chance of showers. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ240-241-182000- Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- 506 AM EDT Mon May 18 2026 /406 AM CDT Mon May 18 2026/ .EARLY THIS MORNING...East wind less than 10 knots. Cloudy with a chance of rain showers and a slight chance of thunderstorms. Patchy fog. Waves 2 to 4 feet subsiding to 2 to 3 feet. .TODAY...Northwest wind less than 10 knots veering northeast late. Cloudy with a slight chance of rain showers. Patchy fog. Waves subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 20 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves building to 4to 7 feet occasionally to 9 feet. .TUESDAY...Northwest wind 10 to 20 knots backing west 10 to 15 knots in the afternoon. Cloudy. A chance of rain showers in the morning. Waves subsiding to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind less than 10 knots with gusts up to 18 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ242-243-182000- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- 506 AM EDT Mon May 18 2026 .EARLY THIS MORNING...Southeast wind 10 to 15 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 2 to 3 feet. .TODAY...Southwest wind less than 10 knots veering northwest by late morning, then veering northeast 10 to 15 knots late. Cloudy. A slight chance of rain showers through mid morning. A slight chance of rain showers late. Patchy fog through the day. Waves subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 20 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest wind 20 to 25 knots backing west 15 to 20 knots in the afternoon. Cloudy. Rain showers likely in the morning. Patchy fog in the morning. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ244-245-182000- Eagle River to Manitou Island MI- Manitou Island to Point Isabelle MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .EARLY THIS MORNING...Southeast wind 10 to 20 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 3 to 6 feet occasionally to 8 feet. .TODAY...South wind 5 to 15 knots veering west less than 10 knots by late morning, then veering north 10 to 15 knots late. Cloudy. A chance of rain showers through mid morning. A slight chance of rain showers late. Patchy fog through the day. Waves subsiding to 2 to 3 feet. .TONIGHT...Northeast wind 10 to 20 knots becoming 10 to 15 knots late. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy dense fog through the night. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest wind 15 to 25 knots becoming 20 to 25 knots in the afternoon. Cloudy. A chance of rain showers in the morning. Patchy fog in the 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 10 to 20 knots with gusts up to 27 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 2 to 4 feet. $$ LSZ246-182000- Point Isabelle to Lower Entrance of Portage Canal MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... .EARLY THIS MORNING...East wind 10 to 15 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 3 to 6 feet occasionally to 8 feet subsiding to 3 to 5 feet occasionally to 7 feet. .TODAY...South wind less than 10 knots veering west by late morning, then veering north late. Cloudy. A slight chance of rain showers through mid morning. A slight chance of rain showers late. Patchy fog through the day. Waves subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. A chance of rain showers and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...Northwest wind 10 to 20 knots becoming 15 to 20 knots in the afternoon. Cloudy. Patchy fog in the morning. Rain showers likely in the morning, then a slight chance of rain showers in the afternoon. Waves building to 2 to 4 feet, then subsiding to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ247-182000- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... .EARLY THIS MORNING...East wind 5 to 15 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TODAY...Southwest wind less than 10 knots veering northwest by late morning, then veering northeast late. Mostly cloudy. A slight chance of rain showers through early afternoon, then a chance of rain showers late. Patchy fog through mid morning. Patchy fog late. Waves subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 5 to 15 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...Northwest wind 10 to 20 knots. Cloudy. A chance of rain showers in the morning. Patchy fog in the morning. Waves building to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ248-182000- Huron Islands to Marquette MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... .EARLY THIS MORNING...Southeast wind 10 to 15 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TODAY...South wind 10 to 15 knots veering west by late morning, then veering north late. Cloudy. Patchy fog through the day. A chance of rain showers through mid morning. A slight chance of rain showers by late morning, then a chance of rain showers late. Waves subsiding to 1 to 2 feet. .TONIGHT...North wind less than 10 knots veering southeast late. Gusts up to 18 knots. Patchy fog through the night. A slight chance of thunderstorms in the evening. Rain showers likely through the night. A chance of thunderstorms after midnight. Waves building to 2 to 3 feet. .TUESDAY...Northwest wind 15 to 25 knots. Mostly cloudy. A chance of rain showers and a slight chance of thunderstorms in the morning. Patchy fog in the morning. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY NIGHT...Northwest wind 15 to 25 knots. Mostly cloudy. Waves subsiding to 3 to 5 feet occasionally to 7 feet. $$ LSZ249-182000- Marquette to Munising MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... .EARLY THIS MORNING...Southeast wind 10 to 15 knots. Showers and a chance of thunderstorms. Patchy fog. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TODAY...South wind 10 to 15 knots veering southwest by late morning, then veering northwest late. Mostly cloudy. Patchy fog through the day. A chance of showers and a slight chance of thunderstorms through mid morning. A slight chance of showers by late morning, then a chance of showers late. Waves 1 to 2 feet. .TONIGHT...Northwest wind less than 10 knots backing west by midnight, then backing south 5 to 15 knots late. Cloudy. A chance of rain showers and a slight chance of thunderstorms through midnight, then a chance of showers and thunderstorms late. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...West wind up to 30 knots veering northwest in the afternoon. Mostly cloudy. Patchy fog in the morning. A chance of rain showersand a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northwest wind up to 30 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ LSZ250-182000- Munising to Grand Marais MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... .EARLY THIS MORNING...Southeast wind 10 to 15 knots with gusts up to 22 knots. Rain showers and a chance of thunderstorms. Patchy fog. Waves 2 to 3 feet. .TODAY...South wind 10 to 15 knots veering southwest by late morning, then veering northwest less than 10 knots late. Gusts up to 22 knots. Mostly cloudy. A chance of showers and a slight chance of thunderstorms through mid morning, then a slight chance of showers by late morning. Patchy fog through the day. Waves subsiding to 1 to 2 feet. .TONIGHT...Northeast wind less than 10 knots veering south 5 to 15 knots by midnight. Cloudy. Patchy fog through the night. A chance of rain showers and a slight chance of thunderstorms in the evening. Rain showers likely and a chance of thunderstorms after midnight. Waves calm to 1 foot. .TUESDAY...Southwest wind 15 to 25 knots veering northwest up to 30 knots in the afternoon. Mostly cloudy. Patchy fog in the morning. Rain showers likely and a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northwest wind 20 to 25 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ LSZ251-182000- Grand Marais to Whitefish Point MI- 506 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... .EARLY THIS MORNING...Southeast wind 15 to 20 knots. Cloudy with a chance of showers and thunderstorms. Patchy fog. Waves 2 to 3 feet. .TODAY...Southeast wind 10 to 15 knots veering west less than 10 knots late. Mostly cloudy. A chance of showers and thunderstorms through mid morning, then a slight chance of showers by late morning. Patchy fog through the day. Waves subsiding to 1 to 2 feet. .TONIGHT...Southeast wind 5 to 15 knots. Cloudy. Patchy fog through the night. A slight chance of thunderstorms in the evening. A chance of rain showers through the night. A chance of thunderstorms after midnight. Waves calm to 1 foot. .TUESDAY...South wind 15 to 25 knots veering west up to 30 knots in the afternoon. Mostly cloudy. Patchy fog in the morning. Rain showers likely and a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northwest wind 20 to 25 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ WFO MQT