Anyone visiting the Lake Michigan shoreline today should stay out of the water, forecasters said.
Three- to 6-foot waves and currents could be life-threatening, according to the National Weather Service. A beach hazards statement remains in effect until this afternoon.
Rip currents and structural currents, which form along piers, can sweep swimmers into deeper water.
A high around 70 degrees was expected today, but the weather could warm during the long, holiday weekend. Highs in the mid-70s and low 80s were expected Saturday and Sunday, and temperatures Monday could rise into the high 80s.
There is a chance of thunderstorms Monday afternoon, the weather service said.