National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Overcast with Haze

82°F

28°C

Humidity 74%
Wind Speed SE 17 G 26 mph
Barometer 29.80 in (1007.3 mb)
Dewpoint 73°F (23°C)
Visibility 6.00 mi
Heat Index87°F (31°C)
Last update 17 May 10:51 am CDT
Extended Forecast for

San Antonio International Airport TX

  • Today

    Today: Cloudy, with a high near 91. South southeast wind around 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Cloudy

  • Tonight

    Tonight: Increasing clouds, with a low around 78. Southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 78 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, with a high near 92. Heat index values as high as 100. South southeast wind around 15 mph, with gusts as high as 30 mph.

    High: 92 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 73. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 73 °F

    T-storms
    Likely then
    Showers
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. East southeast wind 5 to 10 mph.

    High: 87 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. East wind 5 to 10 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 83. East wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 83 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Today
Cloudy, with a high near 91. South southeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Increasing clouds, with a low around 78. Southeast wind around 15 mph, with gusts as high as 30 mph.
Monday
Mostly cloudy, with a high near 92. Heat index values as high as 100. South southeast wind around 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 73. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. East southeast wind 5 to 10 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. East wind 5 to 10 mph.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 83. East wind 5 to 10 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.55°N 98.46°W (Elev. 751 ft)
Last Update:
11:32 am CDT May 17, 2026
Forecast Valid:
11am CDT May 17, 2026-6pm CDT May 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation