San Antonio, TX weather today (Sunday) is mostly sunny with a high near 97°F and heat index values climbing to 105°F, plus just a 20% chance of afternoon and evening storms — get outside early, hydrate often, and save the yard work for tomorrow’s cooler hours.
Best Window To Be Outside
The National Weather Service’s Austin/San Antonio office says today plays out almost like the past few days: dry and sunny for most of the daylight hours, with only a slight chance of an isolated shower or rumble of thunder developing between the Hill Country and the Coastal Plains after 4 PM CT. That makes the morning your best bet — cast a line at Medina Lake or Woodlawn Lake before the heat builds, or grab an early tee time at Brackenridge Park Golf Course while the wind stays light out of the south-southeast at 0 to 10 mph. Pack a tackle storage kit if you’re headed to the water, since bites tend to slow once the sun gets high.
Heat & Storm Risk
With the overnight low only dropping to around 77°F, there’s little relief before the next warm-up. Heat index values could reach 105°F this afternoon, so treat any outdoor stretch after midday like peak Fiesta-season heat — water breaks, shade, and sunscreen aren’t optional. Any storms that do fire up will be sparse and limited mainly to the afternoon and early evening, with coverage staying around 15 to 20 percent through Monday, so don’t cancel plans — just keep an eye on the sky along the I-35 corridor.
Tonight In San Antonio
If you’re downtown for Hamilton (Touring) at the Majestic Theatre San Antonio tonight, expect a warm walk in from the River Walk with temps still near 90°F at showtime — Get tickets on SeatGeek if you’re still looking for seats. Looking ahead, Freestyle Explosion with Stevie B hits Frost Bank Center on August 15; Find tickets on StubHub for that one.
Dinner Tonight
This is prime grilling weather — burgers, steaks, or grilled chicken with corn on the cob all work great on a propane gas grill once the sun eases toward evening in the upper 80s. An instant-read meat thermometer takes the guesswork out of hitting a safe finish on chicken, and a grill brush and scraper set keeps the grates ready to go. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Monday looks like a repeat — sunny, a high near 97°F, heat index up to 106°F, and the same slight storm chance. NWS forecasters expect rain chances to fade out by Tuesday as the upper ridge shifts back to the southeast, with temperatures climbing toward the 100-102°F range by late week. Check the San Antonio weather forecast for daily updates, and browse outdoor gear deals — including a UPF 50+ sun hoodie for $5 — before your next day on the water.
