090
FZUS53 KLOT 221941
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
241 PM CDT Fri Aug 22 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>742-230315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
241 PM CDT Fri Aug 22 2025

.TONIGHT...Southeast winds 5 to 10 kt becoming southwest 10 to
15 kt late. Slight chance of showers after midnight. Waves around
1 ft.
.SATURDAY...West winds 10 to 15 kt becoming northwest 15 to 20 kt
late. Slight chance of showers in the morning. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northwest winds 15 to 20 kt diminishing to
10 to 15 kt. Mostly clear. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 15 kt increasing to 15 to 20 kt.
Mostly sunny. Waves 1 to 3 ft.

$$

LMZ743>745-230315-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
241 PM CDT Fri Aug 22 2025

.LATE THIS AFTERNOON...Northeast winds 5 to 10 kt. Partly cloudy.
Waves around 1 ft.
.TONIGHT...Southeast winds 5 to 10 kt becoming southwest 10 to 15
kt. Partly cloudy in the evening, then becoming mostly cloudy.
Waves 1 to 2 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming northwest late.
Slight chance of showers in the morning. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt. Mostly clear.
Waves 2 to 4 ft.
.SUNDAY...Northwest winds 10 to 20 kt. Mostly sunny. Waves 2 to
4 ft.

$$

KJB