FZUS53 KDTX 211345 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 945 AM EDT Tue Apr 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. LHZ422-212145- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 945 AM EDT Tue Apr 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots late in the afternoon. Partly cloudy late in the morning then clearing. A chance of sprinkles late in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...West winds 10 to 15 knots becoming north 5 to 10 knots in the late evening and overnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Northeast winds 5 to 10 knots. Sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-212145- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 945 AM EDT Tue Apr 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots late in the afternoon. Partly cloudy late in the morning then clearing. A chance of sprinkles late in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...Southwest winds 10 to 15 knots veering to the north in the late evening and overnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Northeast winds 5 to 10 knots. Sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-212145- Port Austin to Harbor Beach MI- 945 AM EDT Tue Apr 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...South winds 15 to 20 knots diminishing to 10 to 15 knots in the afternoon. Partly cloudy late in the morning then clearing. A chance of sprinkles late in the morning. Waves 2 to 4 feet. .TONIGHT...South winds 5 to 10 knots backing to the north in the late evening and overnight. Mostly clear. Waves 1 to 3 feet. .WEDNESDAY...North winds 5 to 10 knots. Sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...East winds 5 to 10 knots until early morning becoming light and variable. Clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-212145- Harbor Beach to Port Sanilac MI- 945 AM EDT Tue Apr 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...South winds 15 to 20 knots diminishing to 10 to 15 knots late in the afternoon. Partly cloudy late in the morning becoming mostly sunny. A chance of sprinkles late in the morning. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TONIGHT...South winds 5 to 10 knots veering to the north in the late evening and overnight. Mostly clear. A slight chance of showers early in the evening. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots. Sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots early in the evening becoming light and variable. Clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-212145- Port Sanilac to Port Huron MI- 945 AM EDT Tue Apr 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...South winds 15 to 20 knots diminishing to 10 to 15 knots late in the afternoon. Mostly cloudy with a chance of sprinkles late in the morning, then mostly sunny with a slight chance of showers in the afternoon. Waves 3 to 5 feet subsiding to 2 to 4 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...Southwest winds 5 to 10 knots veering to the northwest in the late evening and overnight. Partly cloudy. A slight chance of showers until early morning. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots. Mostly sunny. Waves 2 feet or less. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots until early morning becoming light and variable. Clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-212145- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 945 AM EDT Tue Apr 21 2026 .REST OF TODAY...Southwest winds 15 to 20 knots. Partly cloudy. A chance of sprinkles late in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...Southwest winds 10 to 15 knots becoming west 5 to 10 knots in the late evening and overnight. Mostly cloudy with a chance of showers and thunderstorms until early morning, then partly cloudy with a slight chance of showers after midnight. Waves 2 feet or less. .WEDNESDAY...North winds 5 to 10 knots until late afternoon becoming light and variable. Partly cloudy early in the morning then clearing. Waves 2 feet or less. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 47 degrees. $$ KDK You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes