Castaic Lagoon Weather Forecast

    • 59
    • 84

    Sunny

    • 58
    • 90

    Sunny

    • 61
    • 94

    Sunny

    • 67
    • 101

    Hot

    • 71
    • 104

    Hot

    • 69
    • 105

    Hot

Today 17 Aug Santa Clarita Valley

Sunny. Highs in the lower to mid 80s. Southwest Winds 10 to 20 Mph in the afternoon.

Tonight 17 Aug Santa Clarita Valley

Clear. Lows around 60.

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Castaic Lagoon Temperature Statistics

August Temperature

Van Nuys, Van Nuys Airport (21.1 miles)

  • Lowest 1 August, 2025

    61.6 °F

  • Average August

    78.8 °F

  • Highest 7 August, 2025

    103.6 °F

Climate (2020–Present)

Van Nuys, Van Nuys Airport (21.1 miles)

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  • Average Low 2020–2025

    56.6 °F

  • Average 2020–2025

    67.6 °F

  • Average High 2020–2025

    79.6 °F
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