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

68°F

20°C

Humidity 96%
Wind Speed SE 5 mph
Barometer 30.14 in (1019.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 29 Oct 12:56 am CDT
Extended Forecast for

Martindale TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 66. East southeast wind around 5 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 79. East wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62. East wind around 5 mph.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 76. East wind 5 to 10 mph. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East northeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers. Mostly cloudy, with a high near 81. East northeast wind around 5 mph becoming calm.

    High: 81 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph.

    High: 84 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 65. Calm wind becoming south around 5 mph.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 66. East southeast wind around 5 mph.
Thursday
A chance of showers and thunderstorms. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 79. East wind 5 to 10 mph. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 62. East wind around 5 mph.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 76. East wind 5 to 10 mph. Chance of precipitation is 50%.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East northeast wind around 5 mph. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers. Mostly cloudy, with a high near 81. East northeast wind around 5 mph becoming calm.
Saturday Night
Partly cloudy, with a low around 63. Calm wind.
Sunday
Partly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph.
Sunday Night
Mostly cloudy, with a low around 65. Calm wind becoming south around 5 mph.
Monday
Partly sunny, with a high near 85.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Martindale TX
 29.84°N 97.83°W (Elev. 502 ft)
Last Update:
1:24 am CDT Oct 29, 2026
Forecast Valid:
1am CDT Oct 29, 2026-6pm CST Nov 4, 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