Portola State Park Weather Forecast

    • 51
    • 74

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 54
    • 79

    Mostly Sunny

    • 55
    • 91

    Mostly Sunny

    • 55
    • 86

    Partly Sunny

    • 54
    • 82

    Partly Sunny

Today 18 Aug Santa Cruz Mountains

Sunny. Highs in the 70s to lower 80s. Northwest Winds around 5 Mph.

Tonight 18 Aug Santa Cruz Mountains

Mostly clear. Lows in the 50s. Northwest Winds around 5 Mph.

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Portola State Park Temperature Statistics

August Temperature

Palo Alto Airport (14.9 miles)

  • Lowest 3 August, 2025

    53.6 °F

  • Average August

    68.5 °F

  • Highest 6 August, 2025

    80.6 °F

Climate (2020–Present)

Palo Alto Airport (14.9 miles)

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  • Average Low 2020–2025

    50.9 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    67.2 °F
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