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

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Partly Cloudy

87°F

31°C

Humidity 61%
Wind Speed SE 13 mph
Barometer 30.01 in (1014.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 20 Aug 10:51 pm CDT
Extended Forecast for

3 Miles E San Antonio International Airport TX

Heat Advisory August 20, 11:42pm until August 23, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 20, 11:42pm until August 23, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Tonight

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 103. Heat index values as high as 110. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 104. Heat index values as high as 109. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 104 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph becoming south southwest after midnight.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 104. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 104 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. South southwest wind 5 to 10 mph.

    High: 102 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Friday
Mostly sunny and hot, with a high near 103. Heat index values as high as 110. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 104. Heat index values as high as 109. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph becoming south southwest after midnight.
Sunday
Sunny and hot, with a high near 104. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 102. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 77. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 102.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 102.
Wednesday Night
Clear, with a low around 79.
Thursday
Sunny and hot, with a high near 102.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E San Antonio International Airport TX
 29.53°N 98.43°W (Elev. 741 ft)
Last Update:
11:32 pm CDT Aug 20, 2026
Forecast Valid:
11pm CDT Aug 20, 2026-6pm CDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

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