FZUS53 KLOT 231958
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
258 PM 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.

LMZ740-240315-
Winthrop Harbor to Wilmette Harbor IL-
258 PM CDT Sun Aug 23 2026

.LATE THIS AFTERNOON...Northwest winds 10 to 20 kt. Partly 
cloudy. Waves 2 to 4 ft. 
.TONIGHT...Northwest winds 10 to 15 kt. Mostly clear. Waves 2 to 
4 ft subsiding to 1 to 3 ft. 
.MONDAY...Northwest winds around 5 kt becoming northeast around 10
kt late. Mostly sunny. Waves 1 to 3 ft. 
.MONDAY NIGHT...East winds around 10 kt becoming southwest less
than 10 kt overnight. Partly cloudy in the evening then clearing.
Waves 1 to 2 ft. 
.TUESDAY...Southwest winds less than 10 kt becoming southeast
10 to 15 kt in the afternoon. Mostly sunny in the morning, then
becoming partly cloudy. Waves 1 to 2 ft.  

$$

LMZ741>743-240315-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
258 PM CDT Sun Aug 23 2026

.LATE THIS AFTERNOON...Northeast winds 10 to 15 kt. Partly 
cloudy. Waves 2 to 4 ft. 
.TONIGHT...Northeast winds around 10 kt becoming northwest late.
Mostly clear. Waves 2 to 4 ft subsiding to 1 to 3 ft. 
.MONDAY...West winds around 5 kt becoming northeast late. Mostly
sunny in the morning, then becoming partly cloudy. Waves 1 to
3 ft. 
.MONDAY NIGHT...East winds around 10 kt becoming southwest less
than 10 kt overnight. Partly cloudy in the evening then clearing.
Waves 1 to 2 ft. 
.TUESDAY...South winds less than 10 kt becoming southeast around
10 kt in the afternoon. Mostly sunny. Waves around 1 ft.  

$$

LMZ744-745-240315-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
258 PM CDT Sun Aug 23 2026

.LATE THIS AFTERNOON...Northeast winds 10 to 20 kt. Mostly sunny.
Waves 3 to 5 ft. 
.TONIGHT...North winds around 10 kt becoming northwest late.
Mostly clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. 
.MONDAY...West winds around 5 kt becoming north late. Mostly
sunny. Waves 1 to 3 ft. 
.MONDAY NIGHT...Northeast winds around 10 kt becoming south less
than 10 kt overnight. Partly cloudy in the evening then clearing.
Waves 1 to 2 ft. 
.TUESDAY...South winds less than 10 kt becoming southeast in the
afternoon. Mostly sunny. Waves around 1 ft.  

$$

- Izzi