FZUS53 KDTX 220202 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 1002 PM EDT Fri Aug 21 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. LHZ422-221015- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots after midnight, then diminishing to 10 to 15 knots early in the morning. Mostly cloudy. A slight chance of waterspouts this evening. Scattered showers and a chance of thunderstorms this evening, then scattered showers and a slight chance of thunderstorms after midnight. Waves 1 to 3 feet. .SATURDAY...Southwest winds 10 to 15 knots becoming west 5 to 10 knots in the late morning and early afternoon, then becoming northwest 10 to 15 knots early in the afternoon. Mostly cloudy. A slight chance of waterspouts early in the morning. A chance of waterspouts in the late morning and afternoon. A slight chance of thunderstorms in the morning. Numerous showers. A chance of thunderstorms in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...North winds 15 to 20 knots becoming northwest 20 to 25 knots in the late evening and overnight. Mostly clear. Scattered showers and a chance of thunderstorms early in the evening. Waves 2 to 4 feet. A Small Craft Advisory may be needed. .SUNDAY...Northwest winds 20 to 25 knots diminishing to 15 to 20 knots early in the afternoon. Partly cloudy until late afternoon becoming mostly cloudy. Scattered showers early in the afternoon. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-221015- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...South winds 15 to 20 knots diminishing to 10 to 15 knots early in the morning. Mostly cloudy. Scattered showers and a chance of thunderstorms this evening, then scattered showers and a slight chance of thunderstorms after midnight. A chance of waterspouts this evening. A slight chance of waterspouts after midnight. Waves 1 to 3 feet. .SATURDAY...Southwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and early afternoon, then becoming northwest 10 to 15 knots early in the afternoon. A chance of waterspouts. A slight chance of thunderstorms in the morning. Showers. A chance of thunderstorms in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...North winds 15 to 20 knots becoming northwest 20 to 25 knots in the late evening and overnight. Partly cloudy. Scattered showers and a chance of thunderstorms early in the evening. Waves 1 to 3 feet building to 4 to 6 feet in the late evening and overnight. Waves occasionally around 8 feet. A Small Craft Advisory may be needed. .SUNDAY...Northwest winds 20 to 25 knots. Partly cloudy until late afternoon becoming mostly cloudy. Scattered showers early in the afternoon. Waves 4 to 6 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-221015- Port Austin to Harbor Beach MI- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...South winds 10 to 15 knots. Cloudy. Scattered showers and a slight chance of thunderstorms this evening, then scattered showers and a chance of thunderstorms after midnight. A slight chance of waterspouts this evening. A chance of waterspouts after midnight. Waves 1 to 3 feet. .SATURDAY...South winds 10 to 15 knots becoming southwest 5 to 10 knots in the late morning and early afternoon, then veering to the northwest early in the afternoon. A chance of waterspouts. A slight chance of thunderstorms in the morning. Showers. Achance of thunderstorms in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...North winds 15 to 20 knots becoming northwest 20 to 25 knots in the late evening and overnight. A chance of waterspouts early in the evening. Mostly cloudy with scattered showers and a chance of thunderstorms until early morning, then partly cloudy with scattered showers after midnight. Waves 1 to 3 feet building to 5 to 7 feet in the late evening and overnight. Waves occasionally around 10 feet. A Small Craft Advisory may be needed. .SUNDAY...Northwest winds 20 to 25 knots with gusts to 30 knots. Partly cloudy early in the morning becoming mostly cloudy. Scattered showers until late afternoon, then numerous showers early in the afternoon. Waves 6 to 9 feet. Waves occasionally around 12 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-221015- Harbor Beach to Port Sanilac MI- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...South winds 10 to 15 knots. Mostly cloudy. Scattered showers and a slight chance of thunderstorms this evening, then scattered showers and a chance of thunderstorms after midnight. A slight chance of waterspouts after midnight. Waves 1 to 3 feet. .SATURDAY...South winds 10 to 15 knots becoming southwest 5 to 10 knots in the late morning and afternoon. A slight chance of waterspouts early in the morning. A chance of waterspouts in the late morning and afternoon. A slight chance of thunderstorms in the morning. Showers. A chance of thunderstorms in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...North winds 10 to 15 knots becoming northwest 15 to 20 knots in the late evening and overnight. Mostly cloudy early in the evening becoming partly cloudy. A chance of waterspouts early in the evening. Numerous showers early in the evening. A chance of thunderstorms until early morning. Scattered showers in the late evening and overnight. Waves 1 to 3 feet building to 3 to 5 feet in the late evening and overnight. Waves occasionally around 7 feet. A Small Craft Advisory may be needed. .SUNDAY...Northwest winds 15 to 20 knots. Gusts to 30 knots in the late morning and afternoon. Partly cloudy with scattered showers until late afternoon, then mostly cloudy with numerous showers and a chance of thunderstorms early in the afternoon. Waves 4 to 6 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-221015- Port Sanilac to Port Huron MI- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...South winds 10 to 15 knots. Mostly cloudy. Isolated showers this evening, then scattered showers and a chance of thunderstorms after midnight. A slight chance of waterspouts after midnight. Waves 1 to 3 feet. .SATURDAY...South winds 10 to 15 knots becoming southwest 5 to 10 knots in the late morning and afternoon. A slight chance of waterspouts. A slight chance of thunderstorms in the morning. Showers. Thunderstorms likely in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...Northwest winds 10 to 15 knots increasing to 15 to 20 knots in the late evening and overnight. Mostly cloudy early in the evening becoming partly cloudy. A slight chance of waterspouts early in the evening. Numerous showers early in the evening. A chance of thunderstorms until early morning. Scattered showers in the late evening and early morning. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .SUNDAY...Northwest winds 15 to 20 knots. Partly cloudy with scattered showers until late afternoon, then mostly cloudy with numerous showers and a chance of thunderstorms early in the afternoon. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-221015- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 1002 PM EDT Fri Aug 21 2026 .REST OF TONIGHT...Southeast winds 5 to 10knots veering to the south early in the morning. Partly cloudy with scattered showers and a chance of thunderstorms. Waves 2 feet or less. .SATURDAY...Southwest winds 5 to 10 knots increasing to 10 to 15 knots early in the afternoon. Mostly cloudy until late afternoon becoming partly cloudy. A slight chance of waterspouts. Numerous showers and a chance of thunderstorms. Waves 2 feet or less. .SATURDAY NIGHT...Northwest winds 10 to 15 knots increasing to 15 to 20 knots after midnight. Mostly clear. Scattered showers and a chance of thunderstorms early in the evening. A slight chance of waterspouts early in the evening. Waves 2 feet or less. .SUNDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots early in the afternoon. Mostly sunny until late afternoon, then mostly cloudy with scattered showers early in the afternoon. Waves 1 to 3 feet. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 74 degrees. $$ AA You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes