| National Weather Service Forecast for:
Fountain Valley CA Issued by: National Weather Service San Diego, CA |
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| Updated: 1:40 am PST Dec 5, 2025 | ||||||||||||||||||
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| Overnight |
Mostly clear, with a low around 47. Calm wind. |
| Friday |
Sunny, with a high near 69. East wind around 5 mph becoming southwest in the afternoon. |
| Friday Night |
Mostly clear, with a low around 49. Calm wind. |
| Saturday |
Sunny, with a high near 69. Calm wind becoming southwest around 5 mph in the afternoon. |
| Saturday Night |
Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 49. Calm wind becoming east around 5 mph. |
| Sunday |
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 71. |
| Sunday Night |
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 52. |
| Monday |
Patchy fog before 10am. Otherwise, sunny, with a high near 74. |
| Monday Night |
Mostly clear, with a low around 55. |
| Tuesday |
Sunny, with a high near 76. |
| Tuesday Night |
Mostly clear, with a low around 55. |
| Wednesday |
Sunny, with a high near 74. |
| Wednesday Night |
Mostly clear, with a low around 54. |
| Thursday |
Sunny, with a high near 74. |
Forecast from NOAA-NWS for Fountain Valley CA.
