| National Weather Service Forecast for:
San Marcos CA Issued by: National Weather Service San Diego, CA |
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| Updated: 5:33 am PDT Oct 6, 2026 | ||||||||||||||||||
|
| This Afternoon |
Sunny, with a high near 98. West wind 5 to 10 mph, with gusts as high as 20 mph. |
| Tonight |
Clear, with a low around 71. Calm wind. |
| Wednesday |
Sunny, with a high near 95. Light and variable wind becoming west 5 to 10 mph in the afternoon. |
| Wednesday Night |
Mostly clear, with a low around 70. Calm wind. |
| Thursday |
Sunny, with a high near 94. Light and variable wind becoming west 5 to 10 mph in the afternoon. |
| Thursday Night |
Mostly clear, with a low around 68. |
| Friday |
Patchy fog before 11am. Otherwise, sunny, with a high near 90. |
| Friday Night |
Mostly clear, with a low around 67. |
| Saturday |
Mostly sunny, with a high near 84. |
| Saturday Night |
Partly cloudy, with a low around 65. |
| Sunday |
A slight chance of showers. Mostly sunny, with a high near 78. |
| Sunday Night |
A chance of showers. Mostly cloudy, with a low around 61. |
| Columbus Day |
A chance of showers. Mostly sunny, with a high near 75. |
Forecast from NOAA-NWS for San Marcos CA.
