FZUS53 KDTX 180727 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 327 AM EDT Sat Apr 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. LHZ422-181530- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 327 AM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...Southwest winds 20 to 25 knots with gusts to 30 knots becoming west 15 to 20 knots in the afternoon. Light showers and a slight chance of thunderstorms in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...West winds 15 to 20 knots. Mostly clear. Waves 1 to 3 feet. .SUNDAY...West winds 15 to 20 knots. Mostly sunny early in the morning becoming partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Mostly clear. 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. $$ LHZ421-181530- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 327 AM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...South winds 20 to 25 knots with gusts to 30 knots becoming west 15 to 20 knots in the afternoon. Light showers and a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. Waves 2 to 4 feet. .TONIGHT...West winds 15 to 20 knots. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 15 to 20 knots. Mostly sunny early in the morning becoming partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Mostly clear. Waves 3 to 5 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-181530- Port Austin to Harbor Beach MI- 327 AM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .TODAY...South winds 20 to 25 knots with gusts to 30 knots becoming southwest 15 to 20 knots late in the morning, then veering to the west early in the afternoon diminishing to 10 to 15 knots late in the afternoon. Light showers and a slight chance of thunderstorms in the morning, then a 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...West winds 10 to 15 knots. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots veering to the northwest early in the afternoon. Mostly sunny early in the morning becoming partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Partly cloudy. Waves 4 to 6 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-181530- Harbor Beach to Port Sanilac MI- 327 AM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .TODAY...South winds 20 to 25 knots with gusts to 30 knots becoming west 15 to 20 knots early in the afternoon, then diminishing to 10 to 15 knots late in the afternoon. Rain showers and a slight chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...West winds 10 to 15 knots. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots. Mostly sunny early in the morning becoming partly cloudy. A chance of light rain and snow showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...North winds 15 to 20 knots. Partly cloudy. A chance of light snow showers early in the evening. Waves 3 to 5 feet. Waves occasionally around 6 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-181530- Port Sanilac to Port Huron MI- 327 AM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .TODAY...South winds 20 to 25 knots becoming west 15 to 20 knots in the afternoon. Light showers and a slight chance of thunderstorms in the morning, then showers in the afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots becoming northwest 15 to 20 knots early in the afternoon. Mostly sunny until late afternoon, then mostly cloudy with a chance of light rain and snow showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...North winds 15 to 20 knots. Partly cloudy. A chance of light rain and snow showers early in the evening. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-181530- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 327 AM EDT Sat Apr 18 2026 .TODAY...Southwest winds 15 to 20 knots veering to the west in the afternoon. Light showers and a slight chance of thunderstorms in the morning, then showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots early in the afternoon. Mostly sunny until late afternoon, then partly cloudy with a chance of showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly clear. A chance of showers early in the evening. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 52 degrees. $$ MV You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes