FZUS53 KLOT 222031
NSHLOT

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

LMZ740-230445-
Winthrop Harbor to Wilmette Harbor IL-
331 PM CDT Sat Aug 22 2026

.LATE THIS AFTERNOON...Northwest winds 15 to 20 kt. Slight chance
of showers and thunderstorms. Waves 1 to 3 ft building to 2 to 4
ft.  
.TONIGHT...Northwest winds 10 to 20 kt. Slight chance of showers 
and thunderstorms in the evening. Slight chance of waterspouts. 
Waves 1 to 3 ft building to 2 to 4 ft. 
.SUNDAY...Northwest winds 10 to 20 kt. Slight chance of 
waterspouts in the morning. Waves 2 to 4 ft. 
.SUNDAY NIGHT...North winds 5 to 10 kt. 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. 

$$

LMZ741>743-230445-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
331 PM CDT Sat Aug 22 2026

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

.LATE THIS AFTERNOON...East winds around 10 kt becoming northwest
15 to 20 kt. Slight chance of showers and thunderstorms. Waves 1 
to 3 ft building to 2 to 4 ft.
.TONIGHT...Northwest winds 10 to 20 kt. Slight chance of showers 
and thunderstorms in the evening. Slight chance of waterspouts. 
Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft late. 
.SUNDAY...Northwest winds 15 to 20 kt becoming north late. Slight
chance of waterspouts in the morning. Waves 3 to 6 ft 
occasionally to 8 ft. 
.SUNDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 
kt. Mostly clear. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.MONDAY...West winds 5 to 10 kt becoming northeast in the 
afternoon. Mostly sunny in the morning, then becoming partly 
cloudy. Waves 1 to 3 ft. 

$$

LMZ744-745-230445-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
331 PM CDT Sat Aug 22 2026

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

.LATE THIS AFTERNOON...North winds 5 to 10 kt becoming northwest
10 to 20 kt towards sunset. Slight chance of showers and 
thunderstorms. Waves 3 to 5 ft. 
.TONIGHT...Northwest winds 10 to 20 kt becoming north. Slight 
chance of showers and thunderstorms. Slight chance of 
waterspouts. Waves 3 to 6 ft occasionally to 8 ft. 
.SUNDAY...Northwest winds 15 to 20 kt becoming north. Slight 
chance of waterspouts in the morning. Waves 4 to 6 ft 
occasionally to 8 ft. 
.SUNDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 
kt and becoming west late. Partly cloudy in the evening, then 
becoming mostly clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. 
.MONDAY...Southwest winds 5 to 10 kt becoming north in the 
afternoon and then northeast late. Partly cloudy in the morning 
then clearing. Waves 1 to 3 ft. 

$$

Doom/Castro