FZUS53 KDTX 231339 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 939 AM EDT Sun Aug 23 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. LHZ422-232145- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 939 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .REST OF TODAY...Northwest winds 20 to 25 knots. Gusts to 30 knots late in the morning then Gusts to 30 knots late in the afternoon. Mostly sunny late in the morning becoming partly cloudy. Waves 2 to 4 feet. .TONIGHT...Northwest winds to 30 knots diminishing to 20 to 25 knots with gusts to 30 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet. Waves occasionally around 7 feet. .MONDAY...West winds 20 to 25 knots becoming northwest 15 to 20 knots early in the afternoon. Partly cloudy becoming mostly sunny in the late morning and early afternoon becoming partly cloudy. Waves 2 to 4 feet. .MONDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly clear. Waves 1 to 3 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-232145- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 939 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .REST OF TODAY...Northwest winds 20 to 25 knots with gusts to 30 knots. Mostly sunny late in the morning becoming partly cloudy. A slight chance of showers in the afternoon. Waves 5 to 7 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots. Gusts to 30 knots until early morning. Partly cloudy with a slight chance of showers and thunderstorms early in the evening, then mostly cloudy with a slight chance of showers in the late evening and overnight. Waves 5 to 7 feet. Waves occasionally around 10 feet. .MONDAY...Northwest winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots early in the afternoon. Partly cloudy until late afternoon becoming mostly cloudy. A slight chance of showers early in the morning. Waves 4 to 6 feet. Waves occasionally around 8 feet. .MONDAY NIGHT...Northwest winds 10 to 15 knots. Mostly clear. Waves 3 to 5 feet subsiding to 2 to 4 feet after midnight. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-232145- Port Austin to Harbor Beach MI- 939 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .REST OF TODAY...Northwest winds 20 to 25 knots with gusts to 30 knots. Partly cloudy. A chance of showers and a slight chance of thunderstorms in the afternoon. Waves 6 to 9 feet. Waves occasionally around 12 feet. .TONIGHT...Northwest winds 20 to 25 knots with gusts to 30 knots. Mostly cloudy becoming partly cloudy in the late evening and early morning becoming mostly cloudy. A chance of showers and a slight chance of thunderstorms until early morning, then a chance of showers after midnight. Waves 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY...Northwest winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots early in the afternoon. Mostly cloudy. A chance of showers early in the morning. Waves 5 to 7 feet. Waves occasionally around 10 feet. .MONDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Mostly cloudy early in the evening becoming mostly clear. Waves 4 to 6 feet. Waves occasionally around 8 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-232145- Harbor Beach to Port Sanilac MI- 939AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .REST OF TODAY...Northwest winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots late in the afternoon. Partly cloudy. A slight chance of showers and thunderstorms late in the morning, then a chance of showers and thunderstorms in the afternoon. Waves 5 to 7 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 15 to 20 knots. Partly cloudy until early morning becoming mostly cloudy. A chance of showers and thunderstorms early in the evening, then a slight chance of thunderstorms in the late evening and early morning. A slight chance of showers in the late evening and overnight. Waves 5 to 7 feet. Waves occasionally around 10 feet. .MONDAY...West winds 20 to 25 knots with gusts to 30 knots becoming northwest 15 to 20 knots early in the afternoon. Partly cloudy until late afternoon becoming mostly cloudy. A slight chance of showers early in the morning. Waves 4 to 6 feet. Waves occasionally around 8 feet. .MONDAY NIGHT...Northwest winds 10 to 15 knots. Mostly cloudy early in the evening becoming mostly clear. Waves 3 to 5 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-232145- Port Sanilac to Port Huron MI- 939 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .REST OF TODAY...Northwest winds 20 to 25 knots diminishing to 15 to 20 knots late in the afternoon. Partly cloudy. A chance of showers and thunderstorms in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TONIGHT...Northwest winds 15 to 20 knots. Partly cloudy. A chance of showers and thunderstorms early in the evening, then a slight chance of showers in the late evening and overnight. A slight chance of waterspouts in the late evening and early morning. Waves 2 to 4 feet. .MONDAY...West winds 15 to 20 knots increasing to 20 to 25 knots in the late morning and early afternoon, then becoming northwest 15 to 20 knots early in the afternoon. Partly cloudy until late afternoon becoming mostly cloudy. A slight chance of showers early in the morning. Waves 2 to 4 feet. .MONDAY NIGHT...Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and early morning, then increasing to 10 to 15 knots after midnight. Mostly cloudy early in the evening then clearing. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-232145- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 939 AM EDT Sun Aug 23 2026 .REST OF TODAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots late in the afternoon. Mostly sunny. Waves 1 to 3 feet. .TONIGHT...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Partly cloudy early in the evening then clearing. A slight chance of showers and thunderstorms early in the evening. Waves 1 to 3 feet. .MONDAY...West winds 10 to 15 knots. Sunny. Waves 1 to 3 feet. .MONDAY NIGHT...West winds 10 to 15 knots becoming northwest 5 to 10 knots in the late evening and overnight. Mostly clear. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 70 degrees. $$ SS You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes