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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 33.71°N 117.95°W (Text-Only)
NWS Forecast for: Fountain Valley CA
Issued by: National Weather Service San Diego, CA
Last Update: 1:40 am PST Dec 5, 2025		Print

  • Overnight

    Overnight: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear


  • Friday

    Friday: Sunny, with a high near 69. East wind around 5 mph becoming southwest in the afternoon.

    High: 69 °F

    Sunny


  • Friday
    Night

    Friday Night: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear


  • Saturday

    Saturday: Sunny, with a high near 69. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 69 °F

    Sunny


  • Saturday
    Night

    Saturday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 49. Calm wind becoming east around 5 mph.

    Low: 49 °F

    Patchy Fog


  • Sunday

    Sunday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 71.

    High: 71 °F

    Patchy Fog
    then Sunny

  • Sunday
    Night

    Sunday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 10am. Otherwise, sunny, with a high near 74.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear


    • 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.


    Fountain Valley CA
     33.71°N 117.95°W (Elev. 7 ft)

    Visit your local NWS office at: https://www.weather.gov/sgx