Nearshore Marine Forecast
Issued by NWS Chicago, IL

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FZUS53 KLOT 010821 CCA
NSHLOT

Nearshore Marine Forecast...CORRECTED
National Weather Service Chicago/Romeoville IL
321 AM CDT Wed Oct 1 2025

For waters within five nautical miles of shore on Lake Michigan

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the waves, along with the
average height of the highest 10 percent of the waves which will
occasionally be encountered.

LMZ740-011615-
Winthrop Harbor to Wilmette Harbor IL-
321 AM CDT Wed Oct 1 2025

.TODAY...Southeast winds 10 to 20 kt becoming northeast 10 to 15
kt in the afternoon. Partly cloudy in the morning, then becoming
mostly cloudy. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TONIGHT...East winds 10 to 15 kt increasing to 15 to 25 kt
in the evening then becoming southeast and diminishing to 10 to 15
kt around daybreak. Mostly cloudy. Waves 2 to 4 ft building to 3
to 5 ft.
.THURSDAY...Southeast winds 10 to 15 kt. Mostly cloudy in the
morning then clearing. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southeast winds around 10 kt becoming south
overnight. Mostly clear. Waves 1 to 2 ft.

$$

LMZ741-742-011615-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
321 AM CDT Wed Oct 1 2025

.TODAY...Southeast winds 10 to 15 kt becoming northeast in the
afternoon. Partly cloudy in the morning, then becoming mostly
cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...East winds 10 to 15 kt increasing to 15 to 25 kt
in the evening then becoming southeast and diminishing to 10 to 15
kt around daybreak. Waves 1 to 3 ft building to 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming east 5 to 10 kt
in the afternoon. Mostly cloudy in the morning then clearing.
Waves 2 to 4 ft subsiding to 1 to 2 ft.
.THURSDAY NIGHT...Southeast winds around 10 kt becoming south
overnight. Clear. Waves 1 to 2 ft.

$$

LMZ743>745-011615-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
321 AM CDT Wed Oct 1 2025

.TODAY...East winds 10 to 15 kt becoming northeast in the
afternoon. Partly cloudy in the morning, then becoming mostly
cloudy. Waves 1 to 3 ft.
.TONIGHT...Southeast winds 10 to 15 kt increasing to 15 to 25 kt
in the evening then diminishing to 10 to 15 kt around daybreak
Mostly cloudy. Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming east 5 to 10 kt
in the afternoon. Mostly cloudy in the morning, then becoming
partly cloudy. Waves 1 to 2 ft.
.THURSDAY NIGHT...Southeast winds 5 to 10 kt becoming south
overnight. Clear. Waves around 1 ft.

$$

Carlaw