National Weather Service Marine Forecast FZUS53 KMKX

FZUS53 KMKX 152210
NSHMKX

Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
510 PM CDT Thu Oct 15 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ643-160400
Sheboygan to Port Washington WI
510 PM CDT Thu Oct 15 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING

GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING

TONIGHT
Southeast wind 10 to 15 knots backing north 5 to 15 knots late in the evening, then becoming northwest 15 to 25 knots after midnight. Rain showers through around midnight, then chance of showers after midnight. slight chance of waterspouts after midnight. Waves 3 to 4 feet.

FRIDAY
Northwest wind 15 to 25 knots rising to up to 30 knots with gusts to around 35 knots late in the morning, then becoming north gales to 35 knots with gusts to around 40 knots in the afternoon. Slight chance of waterspouts through the day. showers in the morning. Chance of showers in the afternoon. Waves 4 to 6 feet building to 8 to 10 feet.

FRIDAY NIGHT
North gales to 35 knots with gusts to around 40 knots easing to up to 30 knots late in the evening, then easing to 15 to 25 knots after midnight becoming northwest 10 to 15 knots early in the morning. Partly cloudy through around midnight then clearing. Waves 8 to 10 feet subsiding to 3 to 5 feet.

SATURDAY
Northwest wind 10 to 15 knots backing west late in the morning, then backing southwest 10 to 20 knots early in the afternoon becoming 15 to 20 knots late in the afternoon. Sunny. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late morning and early afternoon, then building to 2 to 4 feet late in the afternoon.

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LMZ644-160400
Port Washington to North Point Light WI
510 PM CDT Thu Oct 15 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING

GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING

TONIGHT
Southeast wind 5 to 15 knots veering west with gusts to around 20 knots late in the evening, then rising to 15 to 25 knots after midnight veering northwest early in the morning. Rain showers in the evening, then chance of showers late in the evening. Slight chance of showers after midnight. slight chance of waterspouts after midnight. Waves 3 to 4 feet.

FRIDAY
Northwest wind 15 to 25 knots rising to up to 30 knots with gusts to around 35 knots late in the morning, then becoming north gales to 35 knots with gusts to around 40 knots in the afternoon. Slight chance of waterspouts through the day. chance of showers in the morning. Rain showers in the afternoon. Waves 3 to 4 feet building to 8 to 10 feet.

FRIDAY NIGHT
North gales to 35 knots with gusts to around 40 knots easing to up to 30 knots with gusts to around 35 knots late in the evening, then easing to 15 to 25 knots after midnight becoming northwest 10 to 20 knots early in the morning. Partly cloudy through around midnight then becoming clear. Waves 8 to 10 feet subsiding to 4 to 6 feet.

SATURDAY
Northwest wind 10 to 15 knots becoming west 5 to 10 knots late in the morning, then becoming southwest 10 to 15 knots with gusts to around 20 knots early in the afternoon rising to 15 to 20 knots late in the afternoon. Sunny. Waves 3 to 4 feet subsiding to 1 to 2 feet in the afternoon.

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LMZ645-160400
North Point Light to Wind Point WI
510 PM CDT Thu Oct 15 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING

GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING

TONIGHT
South wind 10 to 15 knots with gusts to around 20 knots veering west 10 to 20 knots late in the evening, then rising to 15 to 25 knots with gusts to around 30 knots after midnight becoming northwest up to 30 knots early in the morning. Rain showers in the evening, then chance of showers late in the evening. Slight chance of showers after midnight. Waves 3 to 4 feet.

FRIDAY
Northwest wind 15 to 25 knots with gusts to around 30 knots rising to up to 30 knots late in the morning, then becoming north gales to 35 knots with gusts to around 40 knots in the afternoon. Slight chance of waterspouts through the day. chance of showers in the morning. Rain showers in the afternoon. Waves 3 to 4 feet building to 10 to 13 feet.

FRIDAY NIGHT
North gales to 35 knots with gusts to around 40 knots easing to up to 30 knots with gusts to around 35 knots late in the evening, then easing to 15 to 25 knots after midnight easing to 10 to 20 knots early in the morning. Partly cloudy. Waves 10 to 13 feet subsiding to 6 to 8 feet early in the morning.

SATURDAY
Northwest wind 10 to 15 knots becoming west 5 to 10 knots late in the morning, then becoming southwest 10 to 15 knots early in the afternoon rising to 15 to 20 knots late in the afternoon. Sunny. Waves 3 to 5 feet subsiding to 1 to 2 feet.

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LMZ646-160400
Wind Point WI to Winthrop Harbor IL
510 PM CDT Thu Oct 15 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING

GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING

TONIGHT
South wind 10 to 15 knots with gusts to around 20 knots veering west 10 to 20 knots late in the evening, then rising to 15 to 25 knots with gusts to around 30 knots after midnight becoming west 15 to 25 knots with gusts to around 30 knots early in the morning. Rain showers in the evening, then showers likely late in the evening. Slight chance of showers after midnight. Waves 3 to 4 feet.

FRIDAY
Northwest wind 15 to 25 knots with gusts to around 30 knots rising to up to 30 knots with gusts to around 35 knots early in the afternoon, then becoming north gales to 35 knots with gusts to around 40 knots late in the afternoon. Slight chance of waterspouts through the day. chance of showers in the morning. Rain showers in the afternoon. Waves 3 to 4 feet building to 9 to 11 feet.

FRIDAY NIGHT
North gales to 35 knots with gusts to around 40 knots easing to up to 30 knots with gusts to around 35 knots late in the evening, then easing to 15 to 25 knots after midnight becoming 15 to 20 knots early in the morning. Partly cloudy. Waves 9 to 11 feet subsiding to 5 to 7 feet early in the morning.

SATURDAY
Northwest wind 10 to 15 knots easing to 5 to 10 knots late in the morning, then becoming southwest 10 to 15 knots in the afternoon. Sunny. Waves 3 to 5 feet subsiding to 1 to 2 feet.

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See Lake Michigan Open Waters Forecast for Sunday through Tuesday.