San Antonio rolled into Thursday, July 9, 2026, under sticky, mid-70s morning air and is now staring down what should be the hottest day of the week, with afternoon highs near 98°F and heat-index values in the low 100s. Any cooldown after sunset will be limited, with overnight lows only slipping into the upper 70s across much of the city.
Afternoon Heat And Friday Shift
According to the National Weather Service, south winds of 5 to 10 mph, with gusts up to 20 mph, will help crank up the feel-like temperatures this afternoon, pushing heat-index readings to around 103°F. Skies stay mostly clear tonight, with a low near 77°F. Forecasters say the intense heat should begin to ease on Friday as Gulf moisture moves back in and daily rain chances start to climb.
Friday Storms And Local Flooding Risk
Scattered showers and thunderstorms become more likely Friday afternoon and evening, with about a 30-40% chance for most neighborhoods and higher odds farther inland. Any storms that do fire could be gusty and drop brief, heavy downpours. Forecasters note that a few stronger cells may quickly produce 1 to 2 inches of rain, enough to trigger localized street flooding in low-lying spots.
Where To Stay Cool
The City of San Antonio keeps a list of cooling sites, including libraries, community centers and pools, that may extend hours during heat events. Check the city page for the latest locations and schedules. Two examples that often expand service are Bode Community Center at 901 Rigsby Ave and Copernicus Community Center at 5003 Lord Rd. For more background on the ongoing hot stretch, see our 95-degree sweatbox all week.
Plan Ahead
Shift strenuous outdoor work to early morning or evening, drink plenty of water, and check in on older neighbors, infants and pets. If storms develop Friday evening, be ready for possible travel delays and secure lightweight outdoor furniture against gusty winds.
