San Antonio started Saturday, May 23, 2026, on a calm note with clear skies and a mild 68°F, but the quiet will be short-lived. A weather pattern is lining up multiple rounds of showers and thunderstorms through the Memorial Day holiday, raising the risk for localized flooding across the area.
Flood Watch In Effect
The National Weather Service Austin/San Antonio has a Flood Watch posted through 7:00 p.m. CDT on Monday, May 25, 2026, for Bexar County and much of south-central Texas. Forecasters report that many spots have already seen 1–3 inches of rain recently, and additional rounds could bring another 1–3 inches, with isolated totals up to 6 inches. That is enough to trigger rapid rises on creeks and low-water crossings, according to the National Weather Service Austin/San Antonio.
Weekend Forecast
For today, Saturday, May 23, expect mostly cloudy skies with about a 50% chance of showers and thunderstorms and a high near 84°F. Stronger storm cores may briefly dump a quarter to a half inch of rain in a hurry. Showers and thunderstorms are likely tonight with a low around 69°F, and Sunday brings yet another chance for storms with a high near 85°F, so plan on hit-or-miss wet spells that could cut into outdoor activities.
Memorial Day And Early Week Outlook
Memorial Day, Monday, May 25, trends mostly sunny and warmer with a high near 87°F and lower overall rain chances, although a few scattered showers cannot be completely ruled out. The pattern turns active again Tuesday into Wednesday, with afternoon storms expected on Tuesday and the heaviest, most widespread rainfall possible from Tuesday night into Wednesday as rain chances, or PoPs, increase and repeated downpours push the flood threat back up.
Plan Ahead And Stay Safe
Drivers are urged not to enter flooded roadways, and to remember the slogan Turn Around, Don't Drown. Steer clear of low-water crossings, since even shallow but fast moving water can sweep vehicles off the road. For local maps, preparedness tips and shelter information, check the City of San Antonio flood page, and keep phones charged or on a battery backup along with a reliable way to receive local warnings.
This unsettled stretch was first flagged in coverage from May 22. For background, see our earlier post Storm's Crosshairs. This page will be updated if watches or warnings change.
