| National Weather Service Forecast for:
San Marcos CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:37 am PDT May 4, 2026 | ||||||||||||||||||
|
| Today |
Partly sunny, with a high near 66. West wind 10 to 15 mph, with gusts as high as 20 mph. |
| Tonight |
A chance of showers after 11pm. Increasing clouds, with a low around 53. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible. |
| Tuesday |
A chance of showers, mainly before 11am. Partly sunny, with a high near 64. West wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible. |
| Tuesday Night |
Partly cloudy, with a low around 50. West wind 5 to 10 mph becoming north after midnight. |
| Wednesday |
Sunny, with a high near 70. Light northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph. |
| Wednesday Night |
Mostly clear, with a low around 53. |
| Thursday |
Sunny, with a high near 76. |
| Thursday Night |
Mostly clear, with a low around 56. |
| Friday |
Sunny, with a high near 79. |
| Friday Night |
Mostly clear, with a low around 57. |
| Saturday |
Sunny, with a high near 82. |
| Saturday Night |
Mostly clear, with a low around 58. |
| Sunday |
Sunny, with a high near 83. |
Forecast from NOAA-NWS for San Marcos CA.
