LMZ740>742-300600-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
244 PM CDT Mon Sep 29 2025
TONIGHT
East winds 5 to 10 kt becoming northeast late. Mostly
clear. Waves around 1 ft.
TUESDAY
Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Mostly sunny. Waves 1 to 2 ft.
TUESDAY NIGHT
Northeast winds around 20 kt becoming east
overnight. Partly cloudy in the evening, then becoming mostly
cloudy. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. A small craft advisory will likely be needed.
WEDNESDAY
East winds 10 to 15 kt. Mostly cloudy. Waves 3 to
5 ft subsiding to 2 to 4 ft.
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