It took rescue officials about 15 minutes to reach the college students in the still-frigid water.
Two people were rescued from a sailboat that overturned in Lake Michigan during the 3 p.m. hour.
The small craft overturned off the shore of Jackson Park, at 65th Street. Officials rescued two college students -- one male and one female -- who were clinging to the boat and towed the craft back to Yacht Harbor.
The pair were wearing life vests, officials said.
There were no life-threatening injuries and the rescued boaters refused transportation to a hospital.
Lake Michigan's water temperature was 56 degrees at the shore and 52 degrees at the intake crib.