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Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
815 AM CDT Thu Oct 9 2025

For waters within five nautical miles of shore on Lake Michigan

LMZ643-091600-
Sheboygan to Port Washington WI-
815 AM CDT Thu Oct 9 2025

.TODAY...Southeast wind 5 to 10 knots rising to 10 to 15 knots
early in the afternoon, then veering south late in the afternoon.
Sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the
afternoon.
.TONIGHT...South wind 15 to 20 knots veering southwest early in
the morning. Slight chance of showers after midnight. Waves 3 to
4 feet.
.FRIDAY...Southwest wind 15 to 25 knots veering west 15 to
20 knots late in the afternoon. Chance of showers in the morning,
then slight chance of showers in the afternoon. Waves 3 to
5 feet. A small craft advisory may be needed.
.FRIDAY NIGHT...Northwest wind 15 to 20 knots. Gusts up to
25 knots. Chance of showers. Waves 2 to 4 feet subsiding to 1 to
2 feet after midnight.

Wave heights are for ice free areas.

$$
LMZ644-091600-
Port Washington to North Point Light WI-
815 AM CDT Thu Oct 9 2025

.TODAY...Southeast wind 5 to 10 knots rising to 10 to 15 knots
early in the afternoon, then veering south late in the afternoon.
Sunny. Waves 1 to 2 feet.
.TONIGHT...South wind 10 to 15 knots becoming 10 to 20 knots
after midnight, then becoming 15 to 20 knots early in the
morning. Clear through around midnight then becoming partly
cloudy. Waves 2 to 4 feet.
.FRIDAY...Southwest wind 15 to 20 knots becoming 10 to 20 knots
early in the afternoon, then becoming 15 to 20 knots late in the
afternoon. Gusts up to 25 knots. Slight chance of showers in the
morning. Waves 3 to 4 feet.
.FRIDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to
15 knots early in the morning. Gusts up to 25 knots. Chance of
showers through the night. Waves 2 to 4 feet subsiding to 1 to
2 feet in the late evening and overnight.

Wave heights are for ice free areas.

$$
LMZ645-091600-
North Point Light to Wind Point WI-
815 AM CDT Thu Oct 9 2025

.TODAY...Southeast wind 10 knots rising to 5 to 15 knots late in
the morning, then veering south 10 to 15 knots early in the
afternoon backing southeast late in the afternoon. Sunny. Waves
1 to 2 feet.
.TONIGHT...Southeast wind 10 to 15 knots veering south late in
the evening, then becoming 10 to 20 knots after midnight becoming
15 to 20 knots early in the morning. Clear through around
midnight then becoming partly cloudy. Waves 1 to 3 feet building
to 2 to 4 feet after midnight.
.FRIDAY...Southwest wind 15 to 20 knots becoming 10 to 20 knots
early in the afternoon, then becoming 15 to 20 knots late in the
afternoon. Gusts up to 25 knots. Slight chance of showers in the
morning. Waves 3 to 4 feet.
.FRIDAY NIGHT...West wind 15 to 20 knots veering northwest in the
late evening and overnight. Chance of showers through the night.
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.

Wave heights are for ice free areas.

$$
LMZ646-091600-
Wind Point WI to Winthrop Harbor IL-
815 AM CDT Thu Oct 9 2025

.TODAY...Southeast wind 5 to 10 knots veering south 5 to 15 knots
late in the morning, then becoming 10 to 15 knots early in the
afternoon backing southeast late in the afternoon. Sunny. Waves
1 to 3 feet.
.TONIGHT...Southeast wind 10 to 15 knots veering south late in
the evening, then becoming 10 to 20 knots after midnight becoming
15 to 20 knots early in the morning. Clear through around
midnight then becoming partly cloudy. Waves 1 to 2 feet building
to 2 to 4 feet after midnight.
.FRIDAY...Southwest wind 15 to 20 knots. Gusts up to 25 knots.
Partly sunny. Waves 3 to 4 feet.
.FRIDAY NIGHT...West wind 15 to 20 knots veering northwest in the
late evening and early morning, then easing to 10 to 15 knots
early in the morning. Chance of showers through the night. Waves
1 to 2 feet.

Wave heights are for ice free areas.

$$
See Lake Michigan Open Waters Forecast for Saturday through Monday.