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

74°F

23°C

Humidity 97%
Wind Speed SE 5 mph
Barometer 29.80 in (1008.2 mb)
Dewpoint 73°F (23°C)
Visibility 6.00 mi
Last update 17 May 6:56 am CDT
Extended Forecast for

5 Miles SSE Wimberley TX

  • Today

    Today: Mostly cloudy, with a high near 89. South wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 89 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 76. South southeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 76 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 90. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 90 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 72 °F

    T-storms
    Likely then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 85 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. East southeast wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, with a high near 89. South wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 76. South southeast wind around 15 mph, with gusts as high as 30 mph.
Monday
Mostly cloudy, with a high near 90. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 77. Southeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 90. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. East southeast wind 5 to 10 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Wimberley TX
 29.92°N 98.07°W (Elev. 1047 ft)
Last Update:
6:44 am CDT May 17, 2026
Forecast Valid:
7am CDT May 17, 2026-6pm CDT May 23, 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