Castaic Lake State Recreation Area Weather Forecast

    • 61
    • 78

    Sunny

    • 61
    • 84

    Sunny

    • 63
    • 88

    Sunny

    • 72
    • 94

    Mostly Sunny

    • 77
    • 97

    Mostly Sunny

    • 77
    • 98

    Mostly Sunny

Today 17 Aug Western San Gabriel Mountains and Highway 14 Corridor

Sunny. Highs from the mid 80s to around 90 at low Elevations to the mid 70s to around 80 at high Elevations. Southwest Winds 15 to 25 Mph in the afternoon.

Tonight 17 Aug Western San Gabriel Mountains and Highway 14 Corridor

Clear. Lows in the mid 50s to mid 60s. Southwest Winds around 15 Mph shifting to the north after midnight.

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Castaic Lake State Recreation Area Temperature Statistics

August Temperature

Sandberg (14.9 miles)

  • Lowest 5 August, 2025

    59.6 °F

  • Average August

    76.8 °F

  • Highest 10 August, 2025

    94.6 °F

Climate (2020–Present)

Sandberg (14.9 miles)

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  • Average Low 2020–2025

    51.3 °F

  • Average 2020–2025

    59.1 °F

  • Average High 2020–2025

    67.9 °F
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