FZUS53 KDTX 210230 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 1030 PM EDT Mon Apr 20 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. LHZ422-211030- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 1030 PM EDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South winds 15 to 20 knots. Gusts to 25 knots. Partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet early in the morning. .TUESDAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots early in the afternoon. Gusts to 25 knots. Mostly cloudy early in the morning then clearing. A chance of sprinkles until late afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the afternoon. .TUESDAY NIGHT...West winds 10 to 15 knots veering to the northeast in the late evening and early morning, then becoming north 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Northeast winds 5 to 10 knots. Sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-211030- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 1030 PM EDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South winds 15 to 20 knots. Gusts to 30 knots early in the morning. Mostly clear this evening becoming mostly cloudy. Waves 2 to 4 feet. .TUESDAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots early in the afternoon. Mostly cloudy early in the morning becoming mostly sunny. A chance of sprinkles until late afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the afternoon. Waves occasionally around 7 feet. .TUESDAY NIGHT...West winds 5 to 10 knots becoming north 10 to 15 knots in the late evening and early morning, then diminishing to 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Northeast winds 5 to 10 knots. Sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-211030- Port Austin to Harbor Beach MI- 1030 PM EDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South winds 15 to 20 knots. Gusts to 25 knots. Mostly clear this evening becoming mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots early in the afternoon. Gusts to 25 knots. Mostly cloudy becoming partly cloudy in the late morning and early afternoon becoming mostly sunny. A chance of sprinkles early in the morning, then a chance of showers in the late morning and early afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Southeast winds 5 to 10 knots backing to the north in the late evening and overnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots. Sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-211030- Harbor Beach to Port Sanilac MI- 1030 PM EDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots after midnight. Gusts to 25 knots. Clear this evening becoming mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...South winds 15 to 20 knots diminishing to 10 to 15 knots early in the afternoon. Gusts to 25 knots. Mostly cloudy early in the morning becoming partly cloudy. A chance of showers until late afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TUESDAY NIGHT...Southwest winds 5 to 10 knots veering to the north in the late evening and overnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots. Sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-211030- Port Sanilac to Port Huron MI- 1030 PM EDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Southeast winds 10 to 15 knots becoming south 15 to 20 knots after midnight. Gusts to 25 knots. Clear this evening becoming partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet early in the morning. .TUESDAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots early in the afternoon. Gusts to 25 knots. Mostly cloudy becoming partly cloudy in the late morning and early afternoon becoming mostly sunny. A chance of showers until late afternoon. Waves 3 to 5 feet subsiding to 2 to 4 feet early in the afternoon. Waves occasionally around 7 feet. .TUESDAY NIGHT...Southwest winds 5 to 10 knots veering to the north after midnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots. Sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-211030- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 1030 PM EDT Mon Apr 20 2026 .REST OF TONIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots early in the morning. Clear. Waves 2 feet or less. .TUESDAY...Southwest winds 15 to 20 knots. Partly cloudy. A chance of sprinkles until late afternoon, then a chance of showers and a slight chance of thunderstorms early in the afternoon. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west 5 to 10 knots in the late evening and overnight. Partly cloudy. A chance of showers and a slight chance of thunderstorms until early morning. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots until late afternoon becoming light and variable. Partly cloudy early in the morning then clearing. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 47 degrees. $$ AA You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes