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Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
505 PM CDT Tue Sep 2 2025

For waters within five nautical miles of shore on Lake Michigan

LMZ643-030400-
Sheboygan to Port Washington WI-
505 PM CDT Tue Sep 2 2025

.TONIGHT...South wind 10 to 15 knots veering southwest with gusts
to around 20 knots early in the morning. Chance of showers and
thunderstorms after midnight. Waves 1 to 2 feet.
.WEDNESDAY...Southwest wind 15 to 20 knots veering west late in
the afternoon. Chance of thunderstorms in the morning. Chance of
showers through the day. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to
15 knots after midnight, then becoming northwest 10 to 15 knots
early in the morning. Partly cloudy. Waves 1 to 2 feet.
.THURSDAY...Northwest wind 10 to 15 knots backing west late in
the morning, then rising to 15 to 20 knots early in the afternoon
becoming west 15 to 20 knots late in the afternoon. Sunny in the
morning then becoming partly sunny. Waves 1 to 2 feet.

$$
LMZ644-030400-
Port Washington to North Point Light WI-
505 PM CDT Tue Sep 2 2025

.TONIGHT...South wind 10 to 15 knots veering southwest early in
the morning. Slight chance of showers after midnight. Slight
chance of thunderstorms after midnight. Chance of showers early
in the morning. Waves around 1 foot.
.WEDNESDAY...Southwest wind 10 to 20 knots veering west 15 to
20 knots in the late morning and afternoon. Chance of
thunderstorms in the morning. Chance of showers through the day.
Slight chance of thunderstorms in the afternoon. Waves 1 to
2 feet.
.WEDNESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to
15 knots after midnight, then becoming northwest 10 to 15 knots
early in the morning. Mostly cloudy through around midnight then
becoming partly cloudy. Waves 1 to 2 feet.
.THURSDAY...Northwest wind 10 to 15 knots backing west with gusts
to around 20 knots late in the afternoon. Mostly sunny. Waves
1 to 2 feet.

$$
LMZ645-030400-
North Point Light to Wind Point WI-
505 PM CDT Tue Sep 2 2025

.TONIGHT...South wind 5 to 10 knots rising to 10 to 15 knots late
in the evening, then veering southwest after midnight becoming
southwest 10 to 15 knots early in the morning. Slight chance of
showers and thunderstorms early in the morning. Waves around
1 foot.
.WEDNESDAY...Southwest wind 10 to 20 knots becoming 15 to
20 knots late in the morning, then veering west early in the
afternoon becoming west 15 to 20 knots late in the afternoon.
Chance of thunderstorms in the morning. Chance of showers through
the day. Slight chance of thunderstorms in the afternoon. Waves
1 to 2 feet.
.WEDNESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to
15 knots after midnight. Mostly cloudy through around midnight
then becoming partly cloudy. Waves 1 to 2 feet building to 2 to
4 feet in the late evening and early morning, then subsiding to
1 to 2 feet early in the morning.
.THURSDAY...Northwest wind 10 to 15 knots backing west late in
the afternoon. Sunny in the morning then becoming partly sunny.
Waves 1 to 2 feet.

$$
LMZ646-030400-
Wind Point WI to Winthrop Harbor IL-
505 PM CDT Tue Sep 2 2025

.TONIGHT...South wind 5 to 10 knots becoming southwest 10 to
15 knots after midnight. Slight chance of showers and
thunderstorms early in the morning. Waves around 1 foot.
.WEDNESDAY...Southwest wind 10 to 15 knots rising to 15 to
20 knots late in the morning, then becoming west 10 to 15 knots
in the afternoon. Chance of showers in the morning. Chance of
thunderstorms through the day. Showers likely in the afternoon.
Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to
15 knots after midnight, then becoming northwest 10 to 15 knots
early in the morning. Slight chance of showers and thunderstorms
through around midnight. Waves 1 to 2 feet building to 2 to
4 feet in the late evening and early morning, then subsiding to
1 to 2 feet early in the morning.
.THURSDAY...Northwest wind 10 to 15 knots backing west late in
the afternoon. Sunny in the morning then becoming partly sunny.
Waves 1 to 2 feet.

$$
See Lake Michigan Open Waters Forecast for Friday through Sunday.