FZUS53 KDTX 181935 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 335 PM 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. LHZ422-190400- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 335 PM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...West winds 20 to 25 knots diminishing to 10 to 15 knots after midnight. Mostly clear. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Mostly sunny early in the morning becoming partly cloudy. A slight chance of showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Mostly clear. Waves 1 to 3 feet. .MONDAY...Northwest winds 10 to 15 knots becoming west 5 to 10 knots in the late morning and early afternoon, then backing to the southwest early in the afternoon. Mostly sunny. Waves 2 feet or less. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-190400- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 335 PM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...West winds 20 to 25 knots diminishing to 10 to 15 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and early afternoon, then veering to the northwest early in the afternoon. Mostly sunny early in the morning becoming partly cloudy. A slight chance of light rain and snow showers early in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Mostly clear. Waves 3 to 5 feet. Waves occasionally around 6 feet. .MONDAY...Northwest winds 15 to 20 knots becoming west 10 to 15 knots in the late morning and early afternoon, then becoming southwest 5 to 10 knots early in the afternoon. Mostly sunny. Waves 3 to 5 feet subsiding to 1 to 3 feet in the late morning and afternoon. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-190400- Port Austin to Harbor Beach MI- 335 PM EDT Sat Apr 18 2026 .TONIGHT...West winds 15 to 20 knots becoming northwest 5 to 10 knots. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots veering to the north early in the afternoon. Mostly sunny early in the morning becoming partly cloudy. A slight chance of light snow showers early in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .SUNDAY NIGHT...Northwest winds 15 to 20 knots. Partly cloudy. Waves 5 to 7 feet. Waves occasionally around 10 feet. A Small Craft Advisory may be needed. .MONDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late morning and early afternoon, then becoming southwest 5 to 10 knots early in the afternoon. Partly cloudy early in the morning then clearing. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the afternoon. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-190400- Harbor Beach to Port Sanilac MI- 335 PM EDT Sat Apr 18 2026 .TONIGHT...West winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less. .SUNDAY...West winds 10 to 15 knots becoming northwest 15 to 20 knots early in the afternoon. Mostly sunny early in the morning becoming partly cloudy. A slight chance of showers in the late morning and early afternoon. A chance of light rain and snow showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...North winds 15 to 20 knots. Partly cloudy. A chance of light snow showers early in the evening. Waves 4 to 6 feet. Waves occasionally around 8 feet. A Small Craft Advisory may be needed. .MONDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late morning and early afternoon, then becoming northeast 5 to 10 knots early in the afternoon. Partly cloudy early in the morning becoming mostly sunny. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the afternoon. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-190400- Port Sanilac to Port Huron MI- 335 PM EDT Sat Apr 18 2026 .TONIGHT...West winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less. .SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Mostly sunny early in the morning, then a slight chance of showers in the late morning and early afternoon. Partly 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 snow showers early in the evening. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small Craft Advisory may be needed. .MONDAY...Northwest winds 10 to 15 knots becoming northeast 5 to 10 knots early in the afternoon. Mostly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the afternoon. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-190400- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 335 PM EDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots early in the morning. Mostly cloudy in the evening then clearing. Waves 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Gusts to 25 knots. Mostly sunny early in the morning, then a slight chance of showers in the late morning and early afternoon. Partly cloudy with a chance of showers early in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly clear. A chance of showers early in the evening. Waves 1 to 3 feet. .MONDAY...Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Sunny. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is 53 degrees. $$ TF You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes