FZUS53 KLOT 220751
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
251 AM CDT Sat Aug 22 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.

LMZ740-221530-
Winthrop Harbor to Wilmette Harbor IL-
251 AM CDT Sat Aug 22 2026

.TODAY...West winds 10 to 15 kt becoming northwest 15 to 20 kt 
by midday. Slight chance of showers and thunderstorms in the 
afternoon. Waves 1 to 3 ft. 
.TONIGHT...North winds 15 to 20 kt becoming northwest 10 to 15 
kt. Slight chance of showers and thunderstorms in the evening. 
Waves 1 to 3 ft building to 2 to 4 ft. 
.SUNDAY...Northwest winds 10 to 20 kt. Sunny in the morning, then
becoming partly cloudy. Waves 2 to 4 ft. 
.SUNDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to 10
kt overnight. Mostly clear. Waves 2 to 4 ft. 

$$

LMZ741>743-221530-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
251 AM CDT Sat Aug 22 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
SUNDAY EVENING...

.TODAY...West winds 10 to 15 kt becoming northwest 15 to 20 kt 
by midday. Slight chance of showers and thunderstorms in the 
afternoon. Waves 1 to 3 ft building to 2 to 4 ft. 
.TONIGHT...North winds 10 to 20 kt. Slight chance of showers and
thunderstorms in the evening. Waves 2 to 4 ft building to 3 to 6
ft occasionally to 8 ft late.
.SUNDAY...Northwest winds 10 to 20 kt becoming north. Sunny in
the morning, then becoming partly cloudy. Waves 3 to 6 ft
occasionally to 8 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to 10
kt overnight. Partly cloudy in the evening, then becoming mostly 
clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. 

$$

LMZ744-745-221530-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
251 AM CDT Sat Aug 22 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH SUNDAY EVENING...

.TODAY...Southwest winds 10 to 15 kt becoming northwest 15 to 20 
kt by midday. Slight chance of showers and thunderstorms in the 
afternoon. Waves 1 to 3 ft building to 3 to 6 ft occasionally to 
8 ft.
.TONIGHT...North winds 10 to 20 kt. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers
overnight. Waves 3 to 6 ft occasionally to 8 ft. 
.SUNDAY...Northwest winds 15 to 20 kt becoming north. Mostly
sunny. Waves 4 to 6 ft occasionally to 8 ft. 
.SUNDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to 10
kt overnight. Partly cloudy in the evening, then becoming mostly 
clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. 

$$

Yack