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: 1:50 pm CDT Jul 13, 2025




This Afternoon: Showers and thunderstorms likely. Mostly cloudy, with a high near 88. West wind around 5 mph becoming east southeast. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 74. Southeast wind around 5 mph.

Monday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Heat index values as high as 101. Calm wind becoming south southwest around 5 mph in the morning.

Monday Night: Mostly cloudy, with a low around 74. South wind around 5 mph.

Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 92. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Tuesday Night: Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

Wednesday: Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night: Mostly clear, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday: Mostly sunny, with a high near 94. South wind 5 to 10 mph.

Thursday Night: Partly cloudy, with a low around 72.

Friday: Mostly sunny, with a high near 93.

Friday Night: Partly cloudy, with a low around 74.

Saturday: Mostly sunny, with a high near 94.



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

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