301
FZUS53 KLOT 220228
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
928 PM CDT Thu Aug 21 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>742-221000-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
928 PM CDT Thu Aug 21 2025

.REST OF TONIGHT...Northeast winds 10 to 15 kt diminishing to
less than 10 kt. Mostly clear becoming partly cloudy. Waves 1 to
3 ft.
.FRIDAY...Northwest winds less than 10 kt becoming east late.
Mostly sunny in the morning, then becoming partly cloudy. Waves
1 to 2 ft.
.FRIDAY NIGHT...Southeast winds 5 to 10 kt becoming southwest
overnight. Partly cloudy in the evening, then becoming mostly
cloudy. Waves around 1 ft.
.SATURDAY...West winds 10 to 15 kt. Slight chance of showers in
the morning. Waves 1 to 2 ft.

$$

LMZ743>745-221000-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
928 PM CDT Thu Aug 21 2025

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming east less
than 10 kt late. Partly cloudy. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.FRIDAY...South winds less than 10 kt becoming north late. Mostly
sunny in the morning, then becoming partly cloudy. Waves 1 to
2 ft.
.FRIDAY NIGHT...Southeast winds 5 to 10 kt becoming southwest
overnight. Partly cloudy in the evening, then becoming mostly
cloudy. Waves around 1 ft.
.SATURDAY...West winds 10 to 15 kt. Slight chance of showers in
the morning, then slight chance of showers and thunderstorms in
the afternoon. Waves around 1 ft.

$$