FZUS53 KLOT 210825

NSHLOT



Nearshore Marine Forecast

National Weather Service Chicago/Romeoville IL

325 AM CDT Sat Mar 21 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>742-211515-

Winthrop Harbor to Wilmette Harbor IL-

Wilmette Harbor to Northerly Island IL-

Northerly Island to Calumet Harbor IL-

325 AM CDT Sat Mar 21 2026



.TODAY...East winds around 10 kt gradually veering southwest and 

increasing to 15 to 25 kt through the day. Mostly cloudy in the 

morning then clearing. Waves 1 to 2 ft building to 2 to 4 ft. 

.TONIGHT...Southwest winds 10 to 20 kt becoming north after

midnight then becoming northeast 20 to 25 kt toward sunrise.  

Partly cloudy. Waves 2 to 4 ft. A small craft advisory will be

needed.

.SUNDAY...North winds to 30 kt. A few gale force gusts to 35 kt 

in the afternoon. Patchy fog. Chance of rain. Waves 5 to 8 ft 

occasionally to 10 ft building to 7 to 10 ft occasionally to 13 

ft.

.SUNDAY NIGHT...North winds to 30 kt with a few gale force gusts 

to 35 kt in the evening diminishing to 20 to 25 kt after 

midnight. Mostly cloudy. Waves 8 to 11 ft occasionally to 14 ft 

subsiding to 6 to 9 ft occasionally to 12 ft.



$$



LMZ743>745-211515-

Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-

Burns Harbor to Michigan City IN-

325 AM CDT Sat Mar 21 2026



.TODAY...East winds around 10 kt gradually veering southwest and 

increasing to 15 to 25 kt through the day. Mostly cloudy in the 

morning then clearing. Waves 1 to 3 ft. 

.TONIGHT...Southwest winds 15 to 20 kt becoming west 10 to 15 kt

overnight. Mostly clear in the evening, then becoming partly

cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. 

.SUNDAY...North winds 20 to 25 kt increasing to 30 kt with a few

gale force gusts to 35 kt. Patchy fog. Chance of rain. Waves 4 to

6 ft occasionally to 8 ft building to 8 to 11 ft occasionally to 

14 ft. A small craft advisory will be needed.

.SUNDAY NIGHT...North winds to 30 kt with a few gale force gusts 

to 35 kt in the evening diminishing to 20 to 25 kt after 

midnight. Slight chance of rain in the evening. Waves 8 to 12 ft 

occasionally to 16 ft subsiding to 7 to 10 ft occasionally to 13 

ft.



$$



Kluber