Chicago woke up to a sticky, partly cloudy start on Tuesday, July 21, 2026, and the city will stay on the warm side, with afternoon highs expected to land in the mid 80s. Scattered showers and thunderstorms are on the table as the day wears on, and gusty winds will give the air a blustery edge. Out on Lake Michigan, conditions are expected to turn hazardous by this afternoon, with beach restrictions likely lingering through midweek.
Afternoon Gusts And Scattered Storms
Forecasters are calling for scattered showers and thunderstorms this afternoon, with a high near 86°F and temperatures only slipping a couple of degrees later in the day. West northwest winds are expected to run around 10 to 15 mph, with gusts up to about 25 mph. Any stronger storm that develops could bring brief heavy downpours and lightning. There was a modest pre dawn threat for stronger storms with hail, but that risk should fade for most neighborhoods by mid morning.
Lake Michigan Hazards
The National Weather Service has issued a Beach Hazards Statement for Lake Michigan beaches from this afternoon through Wednesday evening, warning that high waves and dangerous currents could make swimming life threatening. The advisory urges people to stay out of the water and keep clear of piers, jetties and breakwalls, according to the National Weather Service. Beachgoers are urged to watch the flags and any local postings before heading in, since shoreline conditions can shift quickly and it is safer to err on the side of caution.
Boating And Lifeguards
Nearshore waters are expected to be choppy, and small craft may have a rough go of it, so recreational boaters are advised to use extra caution and delay trips if they can. The Chicago Park District is reminding swimmers to enter the water only when lifeguards are on duty, generally from 11 a.m. to 7 p.m., and to follow posted flags and closures, per the Chicago Park District. Anyone planning to hit a specific beach should check the Park District dashboard before heading out.
Tonight And Cooler Wednesday
Scattered rain showers remain possible before about 4 a.m. Wednesday, with overnight lows near 60°F and north winds of 15 to 20 mph, gusting as high as 30 mph. Wednesday will feel noticeably cooler, with highs near 70°F and steady northerly winds that will keep Lake Michigan choppy through the day. Residents are encouraged to keep an eye on official updates from the National Weather Service as conditions develop.
