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: 11:36 pm CDT Mar 8, 2026		Print

  • Overnight

    Overnight: Patchy fog after 1am. Otherwise, cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Patchy Fog



  • Monday

    Monday: A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 82. Light south southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Monday
    Night

    Monday Night: A slight chance of thunderstorms before 7pm. Mostly cloudy, with a low around 68. South wind around 10 mph. Chance of precipitation is 10%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Cloudy, with a high near 82. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 82 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday
    Night

    Tuesday Night: A chance of showers, then showers and possibly a thunderstorm after 1am. Low around 63. South southeast wind 10 to 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 82. Southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers


  • Wednesday
    Night

    Wednesday Night: Clear, with a low around 48. North wind around 15 mph, with gusts as high as 30 mph.

    Low: 48 °F

    Clear



  • Thursday

    Thursday: Sunny, with a high near 71. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 71 °F

    Sunny



  • Thursday
    Night

    Thursday Night: Clear, with a low around 48. East southeast wind around 5 mph becoming south southwest after midnight.

    Low: 48 °F

    Clear



    • Overnight: Patchy fog after 1am. Otherwise, cloudy, with a low around 60. Calm wind.

    Monday: A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 82. Light south southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    Monday Night: A slight chance of thunderstorms before 7pm. Mostly cloudy, with a low around 68. South wind around 10 mph. Chance of precipitation is 10%.

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Cloudy, with a high near 82. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    Tuesday Night: A chance of showers, then showers and possibly a thunderstorm after 1am. Low around 63. South southeast wind 10 to 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    Wednesday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 82. Southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    Wednesday Night: Clear, with a low around 48. North wind around 15 mph, with gusts as high as 30 mph.

    Thursday: Sunny, with a high near 71. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Thursday Night: Clear, with a low around 48. East southeast wind around 5 mph becoming south southwest after midnight.

    Friday: Sunny, with a high near 81.

    Friday Night: Clear, with a low around 55.

    Saturday: Sunny, with a high near 87.

    Saturday Night: Mostly clear, with a low around 61.

    Sunday: Mostly sunny, with a high near 88.


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

    Visit your local NWS office at: https://www.weather.gov/ewx