National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 29.88°N 97.94°W (Text-Only)
NWS Forecast for: San Marcos TX
Issued by: National Weather Service Austin/San Antonio, TX
Last Update: 12:44 am CDT Apr 15, 2026		Print

  • Overnight

    Overnight: Cloudy, with a low around 21. South southeast wind 15 to 20 km/h.

    Low: 21 °C

    Cloudy



  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 28. South wind 15 to 20 km/h, with gusts as high as 35 km/h.

    High: 28 °C

    Cloudy then
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly between 10pm and 1am. Increasing clouds, with a low around 20. South southeast wind 10 to 15 km/h.

    Low: 20 °C

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 31. South wind 10 to 15 km/h, with gusts as high as 30 km/h.

    High: 31 °C

    Decreasing
    Clouds


  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 21. South southeast wind around 15 km/h, with gusts as high as 30 km/h.

    Low: 21 °C

    Partly Cloudy



  • Friday

    Friday: Partly sunny, with a high near 32. South wind 15 to 25 km/h, with gusts as high as 45 km/h.

    High: 32 °C

    Partly Sunny



  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 19. South southeast wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 40 km/h.

    Low: 19 °C

    Mostly Cloudy



  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 25. South wind 10 to 15 km/h becoming north 20 to 25 km/h in the afternoon. Winds could gust as high as 40 km/h. Chance of precipitation is 60%.

    High: 25 °C

    Chance
    T-storms then
    Showers
    Likely

  • Saturday
    Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 12. North northeast wind 20 to 25 km/h, with gusts as high as 40 km/h. Chance of precipitation is 40%.

    Low: 12 °C

    Chance
    T-storms


    • Overnight: Cloudy, with a low around 21. South southeast wind 15 to 20 km/h.

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 28. South wind 15 to 20 km/h, with gusts as high as 35 km/h.

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly between 10pm and 1am. Increasing clouds, with a low around 20. South southeast wind 10 to 15 km/h.

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 31. South wind 10 to 15 km/h, with gusts as high as 30 km/h.

    Thursday Night: Partly cloudy, with a low around 21. South southeast wind around 15 km/h, with gusts as high as 30 km/h.

    Friday: Partly sunny, with a high near 32. South wind 15 to 25 km/h, with gusts as high as 45 km/h.

    Friday Night: Mostly cloudy, with a low around 19. South southeast wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 40 km/h.

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 25. South wind 10 to 15 km/h becoming north 20 to 25 km/h in the afternoon. Winds could gust as high as 40 km/h. Chance of precipitation is 60%.

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 12. North northeast wind 20 to 25 km/h, with gusts as high as 40 km/h. Chance of precipitation is 40%.

    Sunday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 21.

    Sunday Night: A 20 percent chance of showers. Cloudy, with a low around 12.

    Monday: A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 19.

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 13.

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 23.


    San Marcos TX
     29.88°N 97.94°W (Elev. 577 m)

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