San Marcos, TX Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for San Marcos, TX in one place.
A chance of showers and thunderstorms before 7am, then patchy fog and a chance of showers and thunderstorms between 7am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 80. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for San Marcos, TX is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 2:44 PM CDT.
The active forecast window currently covers Apr 10 to Apr 15, 2026 for San Marcos, TX.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:44 PM CDT
- Forecast office
- EWX
- Source
- NOAA / NWS
Daily Outlook
This Week in San Marcos
Monday looks like the warmest upcoming period in San Marcos at 83 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph SE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:44 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- EWX
- Radar station
- KEWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 66. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
A chance of showers and thunderstorms after 7am. Mostly cloudy, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Mostly cloudy, with a high near 83. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly cloudy, with a low around 69.
A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 7am. Cloudy, with a high near 81. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Chance Showers And Thunderstorms
|
80°F |
5 to 10 mph
SE
|
|
Friday Night
Apr 10
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
66°F |
5 to 10 mph
ESE
|
|
Saturday
Apr 11
|
Chance Showers And Thunderstorms
|
82°F |
5 to 15 mph
SE
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms
|
69°F |
10 to 15 mph
SSE
|
|
Sunday
Apr 12
|
Chance Showers And Thunderstorms
|
81°F |
10 to 15 mph
SSE
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
68°F |
10 to 15 mph
SSE
|
|
Monday
Apr 13
|
Mostly Cloudy
|
83°F |
10 to 15 mph
S
|
|
Monday Night
Apr 13
|
Mostly Cloudy
|
69°F |
10 to 15 mph
SSE
|
|
Tuesday
Apr 14
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
83°F |
10 to 15 mph
S
|
|
Tuesday Night
Apr 14
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
67°F |
10 to 15 mph
SSE
|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms
|
81°F |
10 mph
S
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
64°F |
5 to 10 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around San Marcos.
