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Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
305 AM CDT Wed Sep 3 2025

For waters within five nautical miles of shore on Lake Michigan

LMZ643-032100-
Sheboygan to Port Washington WI-
305 AM CDT Wed Sep 3 2025

.EARLY THIS MORNING...Southwest wind 10 to 15 knots. Mostly
cloudy with a 40 percent chance of showers and thunderstorms.
Waves 1 to 2 feet.
.TODAY...Southwest wind 15 to 20 knots veering northwest late in
the afternoon. Showers likely in the morning. Chance of
thunderstorms through the day. Chance of showers in the
afternoon. Waves 1 to 2 feet.
.TONIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots
early in the morning. Partly cloudy. Waves 2 to 4 feet subsiding
to 1 to 2 feet after midnight.
.THURSDAY...Northwest wind 10 to 15 knots backing west late in
the morning, then rising to 15 to 20 knots early in the afternoon
backing southwest late in the afternoon. Sunny. Waves 1 to
2 feet.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots rising to 15 to
20 knots late in the evening, then backing south 15 to 25 knots
with gusts to around 30 knots after midnight becoming southwest
up to 30 knots early in the morning. Rain showers likely through
the night. Waves 1 to 2 feet building to 5 to 7 feet. A small
craft advisory may be needed.

$$
LMZ644-032100-
Port Washington to North Point Light WI-
305 AM CDT Wed Sep 3 2025

.EARLY THIS MORNING...Southwest wind 10 to 15 knots. Mostly
cloudy with chance of showers and slight chance of thunderstorms.
Waves around 1 foot.
.TODAY...Southwest wind 10 to 15 knots rising to 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. Showers
likely and a chance of thunderstorms through the day. Waves 1 to
2 feet.
.TONIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots
early in the morning. Mostly cloudy through around midnight then
clearing. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the
morning.
.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. Waves
1 to 2 feet.
.THURSDAY NIGHT...Southwest wind 15 to 20 knots backing south
15 to 25 knots after midnight, then becoming southwest up to
30 knots early in the morning. Chance of showers through around
midnight, then showers likely after midnight. Waves 1 to 2 feet
building to 3 to 5 feet in the late evening and overnight. A
small craft advisory may be needed.

$$
LMZ645-032100-
North Point Light to Wind Point WI-
305 AM CDT Wed Sep 3 2025

.EARLY THIS MORNING...Southwest wind 10 to 15 knots. Mostly
cloudy with a 20 percent chance of showers and thunderstorms.
Waves around 1 foot.
.TODAY...Southwest wind 10 to 15 knots rising to 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. Slight chance
of thunderstorms in the morning. Showers likely through the day.
Chance of thunderstorms in the afternoon. Waves 1 to 2 feet.
.TONIGHT...Northwest wind 15 to 20 knots becoming 10 to 20 knots
early in the morning. Mostly cloudy through around midnight then
becoming partly cloudy. Waves 2 to 4 feet.
.THURSDAY...Northwest wind 10 to 15 knots backing west late in
the afternoon. Sunny. Waves 1 to 2 feet.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots rising to 15 to
20 knots late in the evening, then backing south 15 to 25 knots
with gusts to around 30 knots after midnight becoming southwest
up to 30 knots early in the morning. Chance of showers through
the night. Waves 1 to 2 feet building to 3 to 5 feet in the late
evening and overnight. A small craft advisory may be needed.

$$
LMZ646-032100-
Wind Point WI to Winthrop Harbor IL-
305 AM CDT Wed Sep 3 2025

.EARLY THIS MORNING...Southwest wind 10 to 15 knots. Partly
cloudy with a 20 percent chance of showers and thunderstorms.
Waves around 1 foot.
.TODAY...Southwest wind 10 to 15 knots rising to 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
showers and slight chance of thunderstorms in the morning, then
showers likely and a chance of thunderstorms in the afternoon.
Waves 1 to 2 feet.
.TONIGHT...Northwest wind 15 to 20 knots easing to 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 overnight.
.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.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots rising to 15 to
20 knots late in the evening, then backing south 15 to 25 knots
with gusts to around 30 knots after midnight becoming southwest
up to 30 knots early in the morning. Chance of showers through
the night. Waves 1 to 2 feet building to 3 to 5 feet in the late
evening and overnight. A small craft advisory may be needed.

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