FZUS53 KDTX 200747 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 347 AM EDT Wed May 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. LHZ422-201600- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 347 AM EDT Wed May 20 2026 .TODAY...Northwest winds 10 to 15 knots becoming north 5 to 10 knots early in the afternoon, then becoming northeast 15 to 20 knots late in the afternoon. Partly cloudy in the morning becoming mostly sunny. Waves 1 to 3 feet. .TONIGHT...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly clear. Waves 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots. Partly cloudy early in the morning then clearing. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .THURSDAY NIGHT...Northeast winds 15 to 20 knots. Partly cloudy. 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. $$ LHZ421-201600- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 347 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS EVENING... .TODAY...North winds 10 to 15 knots becoming northeast 15 to 20 knots late in the afternoon. Mostly sunny. Waves 1 to 3 feet building to 3 to 5 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...Northeast winds 15 to 20 knots becoming north 10 to 15 knots in the late evening and overnight. Mostly clear. Waves 2 to 4 feet. .THURSDAY...Northeast winds 15 to 20 knots. Partly cloudy early in the morning then clearing. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the afternoon. .THURSDAY NIGHT...Northeast winds 15 to 20 knots. Partly cloudy. Waves 1 to 3 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-201600- Port Austin to Harbor Beach MI- 347 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS EVENING... .TODAY...North winds 10 to 15 knots. Mostly sunny. Waves 2 to 4 feet building to 3 to 5 feet late in the afternoon. Waves occasionally around 7 feet. .TONIGHT...North winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly clear. Waves 3 to 5 feet. Waves occasionally around 7 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .THURSDAY NIGHT...Northeast winds 10 to 15 knots. Partly cloudy. Waves 1 to 3 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-201600- Harbor Beach to Port Sanilac MI- 347 AM EDT Wed May 20 2026 .TODAY...North winds 10 to 15 knots. Mostly sunny in the morning becoming partly cloudy. Waves 2 to 4 feet. .TONIGHT...North winds 10 to 15 knots. Mostly clear. Waves 2 to 4 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming north 15 to 20 knots early in the afternoon. Mostly sunny. Waves 2 to 4 feet. .THURSDAY NIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots in the late evening and overnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-201600- Port Sanilac to Port Huron MI- 347 AM EDT Wed May 20 2026 .TODAY...North winds 10 to 15 knots increasing to 15 to 20 knots late in the afternoon. Partly cloudy in the morning becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and early afternoon, then building to 2 to 4 feet late in the afternoon. .TONIGHT...North winds 10 to 15 knots increasing to 15 to 20 knots in the late evening and overnight. Mostly clear. Waves 2 to 4 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming north 15 to 20 knots early in the afternoon. Mostly sunny until late afternoon becoming partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and early afternoon, then building to 2 to 4 feet early in the afternoon. .THURSDAY NIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots in the late evening and overnight. Partly cloudy until early morning becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-201600- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 347 AM EDT Wed May 20 2026 .TODAY...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the afternoon. Mostly cloudy. A chance of showers in the morning. Waves 2 feet or less. .TONIGHT...Northeast winds 10 to 15 knots increasing to 15 to 20 knots in the late evening and overnight. Mostly cloudy until early morning then clearing. Waves 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots. Sunny until late afternoon becoming partly cloudy. Waves 2 to 4 feet. .THURSDAY NIGHT...East winds 15 to 20 knots. Partly cloudy. Waves 2 to 4 feet. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is missing. $$ TF You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes