San Antonio

San Antonio Braces for Sweltering Heat Wave with Triple-Digit Temperatures Ahead

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Published on May 12, 2025
San Antonio Braces for Sweltering Heat Wave with Triple-Digit Temperatures AheadSource: Google Street View

San Antonio residents are bracing for a heat wave this week, with temperatures projected to soar into the triple digits. According to the National Weather Service, today's forecast predicts a high near 93 degrees under sunny skies, with calm winds turning west in the afternoon. Tonight, the city can expect mostly clear skies and a low around 66.

Moving into tomorrow, the heat intensifies as temperatures are expected to reach a scorching 104 degrees. A light south-southwest wind will bring little relief, as it blows at 5 to 10 mph, gusting up to 20 mph. As the sun sets, the temperature will modestly dip to a low of around 73 degrees under partly cloudy night skies.

The extended forecast offers no respite, with Wednesday and Thursday's highs expected to hover around the 105-degree mark. The nights will be slightly cooler, lingering in the low to mid-70s, and while the wind is anticipated to remain steady from the south at about 5 to 10 mph, its warmth offers small comfort. Clouds will make a timid presence in the evening, before giving way to mostly sunny skies the following days.

San Antonio's blistering trend continues into the weekend with Friday's daytime high near 103 degrees and a nighttime low around 77. The pattern of partly sunny days, and mostly cloudy nights persists through Saturday and Sunday, as both days are forecasted to reach highs around 101 degrees.