San Antonio is kicking off Saturday mostly sunny with a high near 92°F and south-southeast winds at 5 to 15 mph — a classic late-spring Alamo City day with virtually no rain risk, but one that sets the stage for dangerous heat heading into next week.
Today’s Setup
The National Weather Service gives today just a 1% rain chance, so the River Walk, Brackenridge Park, and outdoor patios across the city are in the clear. A dry air layer in the mid-levels is keeping a strong cap in place and suppressing storm development. That’s great news for Saturday plans, but it also means humidity is building at the surface. At 92°F with southeast winds, it’ll feel noticeably muggy by afternoon. Keep a Stanley quencher tumbler close and push fluids early. Tree pollen is still active this time of year in the Hill Country, so allergy sufferers should take their meds before heading outside.
Best Window To Be Outside
Morning through midday is your sweet spot. If you’re mowing at Alamo Ranch, walking the Mission Reach Hike-and-Bike Trail, or squeezing in 18 holes, aim to wrap up by noon CT. Afternoon gusts climb to 25 mph, which matters for golfers and anglers alike. Medina Lake and Canyon Lake will fish well in the morning calm — check out the UPF 50+ fishing shirt deal if you’re spending hours on the water in this sun.
Heat Risk: Sunday Gets Serious
Here’s the bigger story this weekend. The National Weather Service warns that deepening moisture Sunday afternoon will push heat indices to 100–105°F across the area, with isolated spots possibly exceeding 105°F. Sunday’s high also sits near 92°F, but the added humidity will make it feel brutal — especially in direct sun. Limit strenuous outdoor activity to before 10 AM CT Sunday and check the San Antonio weather forecast for any heat advisory upgrades.
Spurs Game 7 — Sunday at Frost Bank Center
If the San Antonio Spurs force a Game 7 against the Minnesota Timberwolves on Sunday, May 17, at Frost Bank Center, the game itself is indoors — but tailgating in that heat is no joke. Bring a portable propane grill and an instant-read meat thermometer to keep food safe when temps and heat indices are both flirting with triple digits. Still need seats? Get tickets on SeatGeek or Find tickets on StubHub. Rep the silver and black with Official team gear on Fanatics.
Tonight’s Dinner Plan
This is prime grilling weather. Fire up the backyard propane gas grill for burgers, steaks, or grilled chicken with corn on the cob. Use a grill brush and scraper set to start clean, and always pull proteins with an instant-read meat thermometer for food-safe results in the heat. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Sunday stays dry but muggy at 92°F with increasing clouds and an 11% rain chance by evening. The National Weather Service flags Monday and Tuesday for stormy conditions and potentially heavy rainfall — part of a wet pattern moving in for much of next week. Heat indices in the 100–105°F range are expected through at least Tuesday. Savor this sunny, lower-humidity Saturday while it lasts, and keep an eye on the San Antonio weather forecast as the week unfolds.
