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

78°F

26°C

Humidity 85%
Wind Speed SE 14 G 20 mph
Barometer 29.89 in (1011.3 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 May 8:56 am CDT
Extended Forecast for

5 Miles SSE Wimberley TX

  • Today

    Today: Mostly cloudy, with a high near 89. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 89 °F

    Mostly Cloudy

  • Tonight

    Tonight: Increasing clouds, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 89 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. East wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 84 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 81. East wind around 5 mph becoming south southeast in the afternoon. Chance of precipitation is 90%.

    High: 81 °F

    Chance
    T-storms then
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 68. South southeast wind around 5 mph. Chance of precipitation is 80%.

    Low: 68 °F

    Showers

  • Friday

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

    High: 81 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, with a high near 89. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Increasing clouds, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. East wind 5 to 10 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 81. East wind around 5 mph becoming south southeast in the afternoon. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 68. South southeast wind around 5 mph. Chance of precipitation is 80%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. South southeast wind around 5 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

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 18, 2026
Forecast Valid:
9am CDT May 18, 2026-6pm CDT May 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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