074
FZUS53 KLOT 231440
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
940 AM CDT Sat Aug 23 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>742-232130-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
940 AM CDT Sat Aug 23 2025

.REST OF TODAY...West winds 10 to 20 kt becoming northwest and
increasing to 15 to 25 kt this afternoon. Partly cloudy. Waves 1
to 3 ft.
.TONIGHT...Northwest winds 15 to 25 kt. Mostly clear. Waves 2 to
4 ft.
.SUNDAY...Northwest winds 15 to 20 kt. Mostly sunny. Waves 2 to 4
ft.
.SUNDAY NIGHT...Northwest winds 15 to 20 kt. Mostly clear. Waves
2 to 4 ft.

$$

LMZ743>745-232130-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
940 AM CDT Sat Aug 23 2025

.REST OF TODAY...Southwest winds 10 to 20 kt becoming northwest
15 to 25 kt this afternoon. Slight chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft building to 2 to
4 ft late.
.TONIGHT...Northwest winds 15 to 25 kt. Mostly clear. Waves 3 to
5 ft.
.SUNDAY...Northwest winds 15 to 20 kt. Mostly sunny. Waves 3 to 5
ft subsiding to 2 to 4 ft.
.SUNDAY NIGHT...Northwest winds 15 to 25 kt. Slight chance of
showers. Waves 3 to 5 ft.

$$

KJB