San Antonio, TX Weather Forecast
Bexar County, Texas
Seven-day outlook
54–85°F across the weekThe week runs between 58° and 84°, with Monday the warmest day of it. There is no real trend across it: one day looks much like the next. Tomorrow is the wettest day, peaking near 56%. 3 of the 7 days stay dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the San Antonio forecast
San Antonio sits at 29.4628°N, 98.5246°W in Bexar County, Texas. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Bexar County
- Coordinates
- 29.4628°N, 98.5246°W
- Population
- 1,495,295 · 2023 estimate
- Land area
- 498.922 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for San Antonio, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see San Antonio?
The nearest Doppler radar is KEWX (Austin/San Antonio, TX), 34 miles to the ENE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches San Antonio its center is about 2,200 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over San Antonio to show rotation in the part of a storm where tornadoes actually form. San Antonio is closer to its radar than 64% of US cities.
The closest instrument actually measuring the air is KSKF · Lackland AFB/Kelly Fld on the ASOS/AWOS network, 6.0 miles away. Near enough to be representative on most days, though a summer thunderstorm can soak one and miss the other entirely.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Texas observing network as of this build.
Forecasts near San Antonio
- Balcones Heights, TX2 mi
- Alamo Heights, TX4 mi
- Castle Hills, TX4 mi
- Terrell Hills, TX5 mi
- Leon Valley, TX6 mi
- Kirby, TX8 mi
- Shavano Park, TX9 mi
- Windcrest, TX9 mi
Elsewhere in Texas
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