Castaic Lake State Recreation Area Weather Forecast

    • 78
    • 91

    Slight Chance Thunderstorms

    • 73
    • 90

    Partly Sunny

    • 66
    • 87

    Sunny

    • 59
    • 82

    Sunny

    • 58
    • 79

    Mostly Sunny

    • 60
    • 78

    Partly Sunny

Today 27 Aug Western San Gabriel Mountains and Highway 14 Corridor

Mostly cloudy with a slight chance of Showers and Thunderstorms. Highs from 94 to 104 at low Elevations to the 80s at high Elevations. West Winds around 15 Mph in the afternoon.

Tonight 27 Aug Western San Gabriel Mountains and Highway 14 Corridor

Mostly cloudy. A slight chance of Showers in the evening. Lows in the upper 60s and 70s. Northwest Winds around 15 Mph.

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Castaic Lake State Recreation Area Temperature Statistics

August Temperature

Sandberg (14.9 miles)

  • Lowest 14 August, 2026

    55.7 °F

  • Average August

    78.7 °F

  • Highest 1 August, 2026

    95.6 °F

Climate (2021–2026)

Sandberg (14.9 miles)

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  • Average Low 2021–2026

    51.2 °F

  • Average 2021–2026

    59.3 °F

  • Average High 2021–2026

    67.9 °F
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