FZUS53 KDTX 182223 AAA NSHDTX Nearshore Marine Forecast for Michigan...UPDATED National Weather Service Detroit/Pontiac MI 623 PM EDT Mon May 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. LHZ422-190630- Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 623 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots. Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Waves 2 to 4 feet. .TUESDAY...Southwest winds 20 to 25 knots with gusts to 30 knots. Mostly cloudy becoming partly cloudy in the late morning and early afternoon becoming mostly sunny. A chance of showers early in the morning. A slight chance of showers and thunderstorms in the late morning and early afternoon, then showers likely and a chance of thunderstorms early in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TUESDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots becoming northwest 15 to 20 knots in the late evening and overnight. Partly cloudy early in the evening becoming mostly cloudy. Light showers likely and a chance of thunderstorms early in the evening. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. .WEDNESDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late morning and early afternoon, then becoming north 15 to 20 knots early in the afternoon. Partly cloudy early in the morning then clearing. Waves 1 to 3 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ421-190630- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay- 623 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots. Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Waves 2 to 4 feet. .TUESDAY...Southwest winds 20 to 25 knots with gusts to 30 knots. Mostly cloudy early in the morning becoming partly cloudy. A slight chance of showers until late afternoon, then showers likely and a slight chance of thunderstorms early in the afternoon. Waves 4 to 6 feet. Waves occasionally around 8 feet. .TUESDAY NIGHT...Southwest winds 20 to 25 knots becoming northwest 15 to 20 knots in the late evening and overnight. Partly cloudy becoming mostly cloudy in the late evening and early morning becoming partly cloudy. A chance of showers and thunderstorms early in the evening. Waves 3 to 5 feet. Waves occasionally around 7 feet. .WEDNESDAY...Northwest winds 15 to 20 knots becoming north 10 to 15 knots in the late morning and early afternoon, then becoming northeast 15 to 20 knots early in the afternoon. Partly cloudy early in the morning then clearing. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ441-190630- Port Austin to Harbor Beach MI- 623 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to 20 knots early in the morning. Mostly cloudy with a chance of thunderstorms and a slight chance of showers in the evening, then partly cloudy after midnight. Waves 1 to 3 feet. .TUESDAY...South winds 15 to 20 knots becoming southwest 20 to 25 knots with gusts to 30 knots in the late morning and afternoon. Partly cloudy until late afternoon becoming mostly sunny. A slight chance of showers until late afternoon, then showers likely and a chance of thunderstorms early in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet. .TUESDAY NIGHT...West winds 15 to 20 knots veering to the north inthe late evening and early morning, then becoming northwest 10 to 15 knots after midnight. Partly cloudy becoming cloudy in the late evening and early morning becoming partly cloudy. A chance of showers and thunderstorms early in the evening, then a chance of showers in the late evening and early morning. Waves 2 to 4 feet. .WEDNESDAY...North winds 10 to 15 knots. Partly cloudy early in the morning then clearing. Waves 3 to 5 feet. Waves occasionally around 7 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ442-190630- Harbor Beach to Port Sanilac MI- 623 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots becoming south 10 to 15 knots in the late evening and overnight. Rain showers and a chance of thunderstorms in the evening, then partly cloudy after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .TUESDAY...Southwest winds 15 to 20 knots. Gusts to 30 knots in the late morning and afternoon. Mostly cloudy early in the morning becoming partly cloudy. A slight chance of showers until late afternoon, then showers likely and a chance of thunderstorms early in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots veering to the northwest in the late evening and early morning, then becoming north 10 to 15 knots after midnight. Partly cloudy becoming mostly cloudy in the late evening and early morning becoming partly cloudy. A chance of showers and thunderstorms early in the evening, then a chance of showers in the late evening and early morning. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .WEDNESDAY...Northwest winds 10 to 15 knots becoming north 15 to 20 knots in the late morning and afternoon. Partly cloudy early in the morning becoming mostly sunny. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LHZ443-190630- Port Sanilac to Port Huron MI- 623 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots becoming south 10 to 15 knots after midnight. Mostly cloudy with showers likely and a chance of thunderstorms in the evening, then partly cloudy after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .TUESDAY...South winds 15 to 20 knots becoming southwest 20 to 25 knots early in the afternoon. Partly cloudy. A slight chance of showers until late afternoon, then a chance of showers and thunderstorms early in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots veering to the north after midnight. Partly cloudy early in the evening becoming mostly cloudy. A chance of showers and thunderstorms until early morning. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .WEDNESDAY...North winds 15 to 20 knots. Partly cloudy until late afternoon becoming mostly sunny. Waves 2 to 4 feet. See Lake Huron Open Lake Forecast for days 3 through 5. $$ LEZ444-190630- Michigan Waters of Lake Erie from Detroit River to North Cape MI- 623 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots in the late evening and overnight. Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Waves 1 to 3 feet. .TUESDAY...Southwest winds 15 to 20 knots. Partly cloudy. A slight chance of thunderstorms in the morning. A chance of showers. A chance of thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west 10 to 15 knots in the late evening and early morning, then veering to the northwest after midnight. Rain showers early in the evening. A chance of thunderstorms until early morning. A chance of showers in the late evening and overnight. Waves 2 to 4 feet subsiding to 2 feet or less in the late evening and overnight. .WEDNESDAY...North winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and afternoon. Partly cloudy. A chance of showers early in the morning. Waves 2 feet or less. See Lake Erie Open Lake Forecast for days 3 through 5. The water temperature at Belle Isle is missing. $$ KDK You can obtain your latest National Weather Service forecasts online a www.weather.gov/greatlakes