FZUS53 KDTX 181331 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 931 AM EDT Sat Jul 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. LHZ422-182145- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 931 AM EDT Sat Jul 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TODAY...West winds 20 to 25 knots becoming northwest 15 to 20 knots early in the afternoon, then increasing to 20 to 25 knots late in the afternoon. Partly cloudy late in the morning then clearing. A chance of showers and a slight chance of thunderstorms late in the morning. Patchy smoke in the afternoon. Waves 2 to 4 feet. .TONIGHT...North winds 20 to 25 knots diminishing to 15 to 20 knots in the late evening and overnight. Mostly clear. Patchy smoke until early morning, then areas of smoke after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. .SUNDAY...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Mostly sunny. Patchy smoke early in the morning. Waves 2 feet or less. .SUNDAY NIGHT...East winds 5 to 10 knots becoming south 10 to 15 knots in the late evening and overnight. Clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-182145- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 931 AM EDT Sat Jul 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TODAY...West winds 20 to 25 knots becoming northwest 15 to 20 knots early in the afternoon, then increasing to 20 to 25 knots late in the afternoon. Partly cloudy with a slight chance of showers and thunderstorms late in the morning, then mostly sunny in the afternoon. Patchy smoke in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TONIGHT...North winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots in the late evening and overnight. Mostly clear. Patchy smoke early in the evening. Areas of smoke in the late evening and overnight. Waves 4 to 6 feet. Waves occasionally around 8 feet. .SUNDAY...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .SUNDAY NIGHT...East winds 5 to 10 knots becoming south 10 to 15 knots in the late evening and overnight. Clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-182145- Port Austin to Harbor Beach MI- 931 AM EDT Sat Jul 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...West winds 15 to 20 knots becoming northwest 20 to 25 knots with gusts to 30 knots late in the afternoon. Partly cloudy. A chance of showers and a slight chance of thunderstorms late in the morning. Patchy smoke in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TONIGHT...North winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots in the late evening and overnight. Clear. Patchy smoke early in the evening. Areas of smoke in the late evening and early morning, then patchy smoke after midnight. Waves 5 to 7 feet. Waves occasionally around 10 feet. .SUNDAY...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .SUNDAY NIGHT...Light and variable winds becoming south 5 to 10 knots in the late evening and early morning, then increasing to 10 to 15 knots after midnight. Mostlyclear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-182145- Harbor Beach to Port Sanilac MI- 931 AM EDT Sat Jul 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...West winds 15 to 20 knots becoming northwest 20 to 25 knots late in the afternoon. Partly cloudy with a chance of showers and thunderstorms. Waves 1 to 3 feet building to 3 to 5 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...North winds 20 to 25 knots with gusts to 30 knots diminishing to 15 to 20 knots after midnight. Mostly clear. Patchy smoke. Waves 4 to 6 feet. Waves occasionally around 7 feet. .SUNDAY...North winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Sunny. Patchy smoke early in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .SUNDAY NIGHT...Northeast winds 5 to 10 knots early in the evening becoming light and variable, then becoming southwest 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-182145- Port Sanilac to Port Huron MI- 931 AM EDT Sat Jul 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...West winds 15 to 20 knots veering to the northwest late in the afternoon. Mostly sunny late in the morning becoming partly cloudy. A chance of showers and thunderstorms late in the morning, then showers likely and a chance of thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. .TONIGHT...North winds 20 to 25 knots diminishing to 15 to 20 knots after midnight. Mostly clear. Patchy smoke. Waves 4 to 6 feet. Waves occasionally around 7 feet. .SUNDAY...North winds 10 to 15 knots diminishing to 5 to 10 knots early in the afternoon. Sunny. Patchy smoke early in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .SUNDAY NIGHT...Northeast winds 5 to 10 knots early in the evening becoming light and variable, then becoming southwest 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-182145- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 931 AM EDT Sat Jul 18 2026 .REST OF TODAY...West winds 15 to 20 knots. Partly cloudy. A chance of showers and thunderstorms in the afternoon. Waves 1 to 3 feet. .TONIGHT...Northwest winds 10 to 15 knots veering to the north in the late evening and overnight. Mostly clear. A chance of showers and thunderstorms early in the evening. Patchy smoke after midnight. Waves 1 to 3 feet. .SUNDAY...North winds 10 to 15 knots becoming east 5 to 10 knots in the late morning and afternoon. Mostly sunny. Patchy smoke early in the morning. Waves 2 feet or less. .SUNDAY NIGHT...Southeast winds 5 to 10 knots veering to the south after midnight. Clear. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 75 degrees. $$ MR You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes