San Antonio is baking under mostly sunny skies today with a high near 98°F and a heat index climbing as high as 105, so if you’ve got outdoor plans, the smart move is pushing them to early morning or evening.
Today’s Setup
Forecasters at the National Weather Service Austin/San Antonio office say the drier air from last weekend’s front is eroding as south-southeasterly winds bring back more humidity, pushing heat indices to 103-108 degrees both today and Wednesday. Expect a milky, hazy sky this afternoon — a mix of suspended smoke from Pacific Northwest wildfires and a light plume of Saharan dust drifting in from the south-southeast. Rain chances sit at just 7% today, with only a slim 5-10% shot at a stray shower well west or southwest of the city, away from downtown and the River Walk.
Best Window To Be Outside
With winds light out of the southeast at 5 to 10 mph, mornings before 10 AM CT are your best bet for a jog around Brackenridge Park or a stroll along the River Walk before the heat index climbs toward 105. By midafternoon, extended time outside gets risky, especially for kids, pets, and anyone working outdoors near Lackland or Fort Sam Houston. Tonight stays warm and muggy with a low around 78 and heat index still near 103, so evening plans should lean toward shaded patios or air-conditioned spots.
Heat And Fire Risk
With no rain in the forecast through Wednesday and highs holding near 100, grass and brush are drying out fast, keeping fire risk elevated even without an official red flag warning today. It’s a good time to check that your fire extinguisher home is charged and your smoke detector combo pack has fresh batteries, especially with hazy, smoke-tinged skies overhead. If the haze thickens, an N95 respirator mask smoke is worth keeping on hand for yard work.
What To Wear Or Bring
Lightweight, breathable clothing and steady hydration are non-negotiable — layer on SPF 50 sunscreen before heading out, and keep blackout curtains drawn during the day to keep bedrooms cooler for tonight’s muggy 78-degree low. A UPF 50+ Sun Hoodie is on sale for just $5 this week, a smart grab before more pool or Hill Country creek time this weekend.
Events This Week
Theater fans can catch Hamilton at the Majestic Theatre San Antonio on August 8 — tickets on SeatGeek — while Don Toliver brings his Octane World Tour to Moody Center ATX on August 9; check out our full concert coverage before grabbing tickets on StubHub.
Dinner Tonight
It’s too hot to fire up the stove — a cold Thai noodle salad, build-your-own wrap bar, or smoothie bowls are the move. A high-powered blender makes quick work of smoothies or a peanut-lime dressing for the noodles. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Wednesday looks nearly identical with a high near 99 and heat index up to 107, still mostly sunny and dry. Thursday backs off slightly to a high near 98. For more, check the San Antonio weather forecast and browse outdoor gear deals to stay ready for the heat.
