FZUS53 KLOT 230801
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
301 AM CDT Sun Aug 23 2026

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.

LMZ740-231530-
Winthrop Harbor to Wilmette Harbor IL-
301 AM CDT Sun Aug 23 2026

.TODAY...Northwest winds 10 to 15 kt becoming north in the
afternoon. Sunny in the morning, then becoming partly cloudy. 
Waves 1 to 3 ft building to 2 to 4 ft. 
.TONIGHT...North winds 10 to 15 kt becoming northwest 5 to 10 kt.
Partly cloudy in the evening, then becoming mostly clear. Waves 2
to 4 ft subsiding to 1 to 3 ft. 
.MONDAY...Northwest winds 5 to 10 kt becoming northeast in the 
afternoon. Mostly sunny. Waves 1 to 3 ft. 
.MONDAY NIGHT...Southeast winds around 5 kt becoming southwest
overnight. Mostly clear. Waves 1 to 2 ft.  

$$

LMZ741-742-231530-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
301 AM CDT Sun Aug 23 2026

.TODAY...Northwest winds 10 to 15 kt becoming north in the
afternoon. Sunny in the morning, then becoming partly cloudy. 
Waves 2 to 4 ft building to 3 to 5 ft. 
.TONIGHT...North winds 10 to 15 kt becoming northwest overnight.
Partly cloudy in the evening, then becoming clear. Waves 3 to 5 
ft subsiding 2 to 4 ft. 
.MONDAY...West winds 5 to 10 kt becoming northeast in the 
afternoon. Mostly sunny. Waves 1 to 3 ft. 
.MONDAY NIGHT...East winds 5 to 10 kt becoming southwest 
overnight. Partly cloudy in the evening, then becoming mostly 
clear. Waves 1 to 2 ft. 

$$

LMZ743>745-231530-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
301 AM CDT Sun Aug 23 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...Northwest winds 10 to 15 kt becoming north and increasing
to 15 to 20 kt in the afternoon. Mostly sunny in the morning, 
then becoming partly cloudy. Waves 2 to 4 ft building to 4 to 6 
ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 15 kt becoming northwest overnight.
Partly cloudy in the evening, then becoming mostly clear. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.MONDAY...West winds 5 to 10 kt becoming north in the afternoon. 
Mostly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft. 
.MONDAY NIGHT...East winds around 10 kt becoming south overnight.
Mostly clear. Waves 1 to 2 ft.  

$$

Yack