FZUS53 KMKX 181610 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 1110 AM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-182200- Sheboygan to Port Washington WI- 1110 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...South wind 10 to 15 knots with gusts to around 20 knots. Chance of showers early in the afternoon. Slight chance of thunderstorms through the day. Slight chance of showers late in the afternoon. Waves 3 to 4 feet. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots after midnight. Patchy fog through around midnight. slight chance of showers and thunderstorms through around midnight, then showers likely and a chance of thunderstorms after midnight. Waves 3 to 4 feet. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Chance of thunderstorms and slight chance of showers in the morning, then chance of showers in the afternoon. Waves 3 to 4 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots with gusts to around 20 knots late in the evening, then becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight veering north early in the morning. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight. $$ LMZ644-182200- Port Washington to North Point Light WI- 1110 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .REST OF TODAY...South wind 10 to 20 knots becoming 10 to 15 knots late in the afternoon. Chance of showers early in the afternoon. Slight chance of thunderstorms through the day. Slight chance of showers late in the afternoon. Waves 2 to 4 feet. .TONIGHT...South wind 10 to 15 knots with gusts to around 20 knots rising to 15 to 20 knots after midnight, then becoming south 15 to 20 knots with gusts to around 25 knots early in the morning. Slight chance of showers and thunderstorms through around midnight, then chance of showers and thunderstorms after midnight. Waves 2 to 4 feet. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Slight chance of showers and thunderstorms in the morning, then chance of showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. $$ LMZ645-182200- North Point Light to Wind Point WI- 1110 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .REST OF TODAY...South wind 15 to 20 knots easing to 10 to 15 knots late in the afternoon. Chance of showers early in the afternoon. Slight chance of thunderstorms through the day. Slight chance of showers late in the afternoon. Waves 2 to 4 feet. .TONIGHT...South wind 10 to 15 knots becoming 10 to 20 knots late in the evening, then becoming 15 to 20 knots after midnight becoming south 15 to 20 knots early in the morning. Gusts up to 25 knots. Slight chance of showers and thunderstorms through around midnight, then chance of showers and thunderstorms after midnight. Waves 2 to 4 feet. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Chance of showers and slight chance of thunderstorms through the day. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. $$ LMZ646-182200- Wind Point WI to Winthrop Harbor IL- 1110 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .REST OF TODAY...South wind 10 to 15 knots with gusts to around 20 knots. Chance of showers early in the afternoon. Slight chance of thunderstorms through the day. Slight chance of showers late in the afternoon. Waves 2 to 4 feet. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots in the late evening and early morning, then becoming south 15 to 20 knots with gusts to around 25 knots early in the morning. Slight chance of showers and thunderstorms through around midnight. Chance of showers and thunderstorms after midnight. Waves 2 to 4 feet. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Chance of showers and slight chance of thunderstorms. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. $$ See Lake Michigan Open Waters Forecast for Wednesday through Friday.