San Antonio weather today brings a high near 93°F under mostly sunny skies — but with the heat index climbing as high as 102°F this afternoon, the Alamo City feels considerably hotter, so time your outdoor plans carefully.
Today’s Setup
A dome of high pressure anchored over the desert Southwest is locking in dry, sunny conditions with virtually no rain chance (just 2% today). South-southeast winds of 5 to 10 mph with gusts up to 20 mph will keep Gulf moisture circulating, pushing that heat index up during peak afternoon heating. The National Weather Service notes the worst of it will land along and east of I-35 and across the Rio Grande plains — think East San Antonio, the Brooks City Base corridor, and areas stretching toward Seguin and Floresville. Isolated heat index values could briefly approach 108°F, though no Heat Advisory is currently in effect for San Antonio.
Best Window To Be Outside
Get your outdoor time in before 10 AM CT. Brackenridge Park, the River Walk, and McAllister Park trails are excellent at sunrise but punishing by noon. Golfers at Pecan Valley or Canyon Springs Golf Club: tee off at first light and wrap up by 9:30. Tonight’s low of around 76°F still carries a heat index near 101°F, so even evening River Walk strolls call for a Stanley tumbler 40oz packed with ice water.
Heat and Fire Risk
Dry soil, low afternoon humidity, and persistent south winds gusting to 20 mph are creating elevated fire danger across Hill Country rangelands and south Texas brush. If you’re grilling this week, keep a fire extinguisher home within reach and a fire blanket kitchen near the stove. This is a smart week to test your smoke detector combo pack with fresh batteries. With an extended dry stretch ahead, assembling a go bag emergency evacuation kit is sound south-Texas prep. If any brush-fire smoke drifts into the metro, an N95 respirator mask smoke protects your lungs outdoors. Stock up on safety and warm-weather essentials at our outdoor gear deals.
Ariana Grande Wednesday Night
Ariana Grande brings The Eternal Sunshine Tour to Moody Center ATX on Wednesday, June 24 — about 80 miles up I-35. Wednesday’s forecast mirrors today: near 93°F, mostly sunny, with south winds gusting to 25 mph. Dress light, hydrate before you go, and grab tickets on SeatGeek while you can. An Ariana Grande t-shirt or Ariana Grande hat is the perfect finishing touch for the night. Also on the horizon: Ali Siddiq: The Custom Fit Tour at Selena Auditorium on June 27, and Hilary Duff: the lucky me tour at Germania Insurance Amphitheater on June 28.
Next Few Days
Wednesday holds steady at 93°F with mostly sunny skies and slightly brisker south winds gusting to 25 mph. Thursday nudges up to near 94°F. The National Weather Service is clear: dry weather and above-normal temperatures continue through the weekend and into early next week — no rain in sight for the San Antonio weather forecast. With the oven off-limits in this heat, a cold Thai noodle salad, smoothie bowls, or a build-your-own wrap bar are your best moves tonight. A high-powered blender handles smoothie bowls in minutes. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
