Chicago Weather

Marine Data

Below you'll find the latest marine forecast for our area. This forecast updates daily.

Winthrop Harbor To Wilmette Harbor-

Wilmette Harbor To Northerly Island-

Northerly Island To Calumet Harbor-Calumet Harbor To Gary-

Forecast as of 3:03 PM CDT on March 27, 2015

Small Craft Advisory in effect through Saturday morning


Northeast winds 20 to 25 kt diminishing to 10 to 20 kt. Partly cloudy. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft late.


Northeast winds 5 to 10 kt becoming east in the afternoon. Sunny. Waves subsiding to 2 to 4 ft in the afternoon.

Saturday Night

Southeast winds 10 to 20 kt becoming south...and then increasing to 30 kt late. Mostly clear. Waves 1 to 3 ft building to 3 to 5 ft occasionally to 7 ft after midnight.


South winds to 30 kt becoming southwest in the afternoon. Occasional gale force gusts to 35 kt are possible. Rain or snow likely in the morning...then rain in the afternoon. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft in the afternoon.