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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast and Breezy

79°F

26°C

Humidity 69%
Wind Speed SE 22 G 25 mph
Barometer 30.03 in (1016.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 4 Mar 10:56 am CST
Extended Forecast for

5 Miles WSW Martindale TX

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Partly sunny, with a high near 85. South wind around 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 9pm. Increasing clouds, with a low around 68. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Slight Chance
    Showers then
    Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and 3pm. Cloudy through mid morning, then gradual clearing, with a high near 85. South southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 67. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 84. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers and possibly a thunderstorm after noon. High near 84. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 84 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 60. East wind around 10 mph becoming north northeast in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 60 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. High near 73. Northeast wind around 10 mph. Chance of precipitation is 80%.

    High: 73 °F

    Showers

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Partly sunny, with a high near 85. South wind around 15 mph, with gusts as high as 25 mph.
Tonight
A 20 percent chance of showers before 9pm. Increasing clouds, with a low around 68. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
A chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and 3pm. Cloudy through mid morning, then gradual clearing, with a high near 85. South southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 67. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 84. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
A chance of showers, then showers and possibly a thunderstorm after noon. High near 84. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 60. East wind around 10 mph becoming north northeast in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Sunday
Showers, with thunderstorms also possible after noon. High near 73. Northeast wind around 10 mph. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 63.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 83.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Tuesday
Showers likely. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
Last Update:
11:30 am CST Mar 4, 2026
Forecast Valid:
11am CST Mar 4, 2026-6pm CDT Mar 10, 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