FZUS53 KLOT 201939

NSHLOT



Nearshore Marine Forecast

National Weather Service Chicago/Romeoville IL

239 PM CDT Fri Mar 20 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>742-210315-

Winthrop Harbor to Wilmette Harbor IL-

Wilmette Harbor to Northerly Island IL-

Northerly Island to Calumet Harbor IL-

239 PM CDT Fri Mar 20 2026



.TONIGHT...North winds 10 to 20 kt becoming east and diminishing

to around 10 kt late. Mostly cloudy. Waves 1 to 3 ft. 

.SATURDAY...Southeast winds around 10 kt becoming south and

increasing to 15 to 20 kt. Mostly cloudy in the morning then

clearing. Waves 1 to 2 ft. 

.SATURDAY NIGHT...Southwest winds around 15 kt becoming west

overnight. Partly cloudy in the evening, then becoming mostly

cloudy. Waves 1 to 2 ft. 

.SUNDAY...North winds 15 to 20 kt increasing to 30 kt. Slight

chance of rain. Waves 3 to 5 ft building to 5 to 8 ft

occasionally to 10 ft. A small craft advisory will likely be

needed.  



$$



LMZ743>745-210315-

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

Burns Harbor to Michigan City IN-

239 PM CDT Fri Mar 20 2026



.TONIGHT...North winds 15 to 20 kt becoming northeast and

diminishing to around 10 kt. Mostly cloudy. Waves 2 to 4 ft.

.SATURDAY...Southeast winds around 10 kt becoming south. Mostly

cloudy in the morning then clearing. Waves 1 to 3 ft. 

.SATURDAY NIGHT...South winds 10 to 15 kt becoming southwest.

Partly cloudy. Waves 1 to 2 ft. 

.SUNDAY...Northwest winds 15 to 20 kt becoming north and

increasing to 30 kt in the afternoon. Slight chance of rain.

Waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft. A

small craft advisory will likely be needed.  



$$



KJB