SXUS83 KLOT 211351 OMRLOT ILZ104-221500- Southern Lake Michigan Water Temperatures National Weather Service Chicago/Romeoville IL 851 AM CDT Sat Mar 21 2026 Lake Michigan Water Temperatures... Chicago Shore...........40. Chicago Crib............42. Michigan City...........39. South Mid Lake Buoy.....38. && M is for missing data that is normally available. Chicago Shore, Chicago Crib, and Michigan City are read every day of the year. Measured at a depth of 60 ft for Chicago Crib and 30 ft for Michigan City. May not represent surface temperature. For Lake Michigan water levels, please see: water.usace.army.mil/office/lre/forecast/weekly $$