San Antonio is welcoming the summer solstice with a high near 90°F and a heat index that could feel like 101°F this afternoon — make hydration your first priority before you head outside today.
Today’s Setup
The National Weather Service gives a 20% chance of showers and thunderstorms before 1 PM CT, mainly along the Coastal Plains. Once that morning window clears, skies turn partly sunny and temperatures climb fast. NWS forecasters note heat index values along the I-35 corridor could touch 100–106°F today — and isolated spots may briefly hit 108°F for an hour or two. Tonight stays warm near 78°F under partly cloudy skies, with SSE winds near 10 mph gusting to 25 mph. The River Walk won’t offer much natural cool-down tonight.
Best Window To Be Outside
Get your outdoor plans done early. Friedrich Wilderness Park, a morning walk along the Museum Reach, or weekend errands are all manageable before 10 AM CT. After noon, the combination of south winds and high humidity turns the heat index brutal. A Yeti rambler water bottle or insulated tumbler 30oz packed with ice water isn’t optional this week — it’s survival gear. moisture wicking undershirts men are worth pulling out of the drawer if you’re doing any yard work or spending time on the patio.
Heat Risk This Week
Monday steps it up even further: mostly sunny skies with a high near 93°F and a heat index climbing to 105°F as an upper-level ridge builds over northern Mexico. The National Weather Service is watching for a possible Heat Advisory for the Coastal Plains Monday afternoon. Personnel at Lackland AFB and Fort Sam Houston should monitor conditions closely and build in extra hydration breaks. This is the kind of heat that sneaks up fast — especially when you’ve got maximum daylight on the solstice.
Events This Weekend
Tonight, 5 Seconds of Summer: EVERYONE’S A STAR! World Tour plays Moody Center ATX in Austin. Making the drive? Evening temps should sit near 78°F with partly cloudy skies — warm but manageable. Grab a 5 Seconds of Summer t-shirt and check tickets on SeatGeek. Also tonight, Nate Bargatze brings the Big Dumb Eyes World Tour to Hilliard Center Arena — a solid indoor option to escape the heat.
Looking ahead, Ariana Grande brings The Eternal Sunshine Tour to Moody Center ATX on Wednesday, June 24. Tickets are still available on StubHub, and an Ariana Grande t-shirt is a great way to show up ready.
Too Hot To Cook? Tonight’s Dinner Plan
Skip the oven entirely. Cold Thai noodle salad, smoothie bowls, or a build-your-own wrap bar are all perfect for this kind of heat. A high-powered blender handles smoothie bases and cold sauces in seconds. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
The Week Ahead
The San Antonio weather forecast stays dry and hot through at least midweek — no significant rain in the pipeline. Mow early, grill before 9 AM, and save outdoor gear deals browsing for the couch. Afternoons belong to the air conditioning through Friday.
