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.

Mostly Cloudy

88°F

31°C

Humidity 63%
Wind Speed S 15 mph
Barometer 30.01 in (1015.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 14 Oct 11:56 am CDT
Extended Forecast for

Martindale TX

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Heat index values as high as 102. South wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 68. Southeast wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 90. Southeast wind around 5 mph.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 77. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.

    High: 77 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.

    Low: 53 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. North northeast wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. North northeast wind 5 to 10 mph becoming light north.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 77. North wind around 5 mph becoming calm in the afternoon.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Heat index values as high as 102. South wind around 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 68. Southeast wind 5 to 15 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 90. Southeast wind around 5 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 77. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.
Friday Night
Partly cloudy, with a low around 53. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.
Saturday
Mostly sunny, with a high near 72. North northeast wind 15 to 20 mph, with gusts as high as 35 mph.
Saturday Night
Mostly clear, with a low around 51. North northeast wind 5 to 10 mph becoming light north.
Sunday
Mostly sunny, with a high near 77. North wind around 5 mph becoming calm in the afternoon.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Martindale TX
 29.84°N 97.83°W (Elev. 502 ft)
Last Update:
11:32 am CDT Oct 14, 2026
Forecast Valid:
12pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

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Chance of Precipitation