San Antonio just went through its hottest weather of the year so far. On Wednesday, high temperatures across the Alamo City topped out at 100 degrees for the first time in 2026. Then on Thursday, temperatures climbed once again into the upper 90s, with humidity driving heat index values above 105 degrees.
A slight dip in temperatures is expected Friday as the remnants of Tropical Storm Bertha continue pushing west and high air pressure weakens slightly across South-Central Texas. Don’t expect cool weather, though — it’ll simply be less hot. Here’s what to expect.
A mild and muggy start is expected on Friday, as temperatures in San Antonio will hover in the upper 70s to near 80 degrees through the early morning. A few isolated showers and weak storms will also be possible early, as the remnants of Tropical Storm Bertha progress through the region.
San Antonio’s rain chances will be at 20% to 30% through 6 a.m., falling to 10% or lower after 7 a.m. Partly to mostly cloudy skies are also expected early, before turning mostly sunny by the late morning.
Temperatures will rise a bit more slowly Friday, likely still in the mid- to upper 80s at noon. Then by the late afternoon, San Antonio temps are likely to top out at 94 to 95 degrees — about four to six degrees cooler than afternoon temps earlier this week.
While slightly cooler than in the past couple of days, this level of heat can still be dangerous. High humidity values will stay in place, leading to heat index values near 100 degrees. If you have outdoor plans, drink plenty of water and take frequent breaks in air-conditioned spaces.
Relatively quiet weather will continue into this weekend throughout South-Central Texas. On Saturday, morning temperatures will be a bit lower, falling into the mid-70s. By the afternoon, bright sunshine is expected as temperatures rise to 96 to 97 degrees.
Similar weather is expected on Sunday, as highs will once again rise to around 97 degrees in San Antonio. Winds will also be rather light, moving in from the south at 5-10 mph.
Weather models are showing that a typical summer weather pattern will continue to dominate the forecast next week. High temperatures will likely rise another degree or two, topping out at 98 to 99 degrees from Monday through Wednesday. Rain chances will also stay slim to none, and high pressure overhead will keep skies mostly sunny.
By the end of next week and into the first week of August, long-range weather models show that high air pressure may become more centered over Texas. If this happens, it could likely result in consistent triple-digit temperatures.
The extreme heat may also continue through much of August, as well. According to the Climate Prediction Center’s outlook, San Antonio has nearly an 80% chance of near-average to above-average temperatures during the month, with just a 20% chance of below-average temps.