Bonita Reservoir Weather Forecast

    • 73
    • 89

    Becoming Sunny

    • 72
    • 89

    Mostly Sunny

    • 69
    • 84

    Mostly Sunny

    • 67
    • 81

    Mostly Sunny

    • 65
    • 78

    Mostly Sunny

    • 65
    • 78

    Mostly Sunny

Today 8 Sep Orange County Coastal

Partly cloudy in the morning. Becoming mostly sunny. Highs 83 to 88 at the Beaches to 90 to 95 farther inland and near higher coastal Terrain. Areas of Winds northwest to 10 Mph becoming west with Gusts to 25 Mph in the afternoon.

Tonight 8 Sep Orange County Coastal

Mostly clear. Lows around 72. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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Bonita Reservoir Temperature Statistics

September Temperature

John Wayne-Orange County Airport (3.1 miles)

  • Lowest 5 September, 2026

    64.9 °F

  • Average September

    73.4 °F

  • Highest 5 September, 2026

    84 °F

Climate (2021–2026)

John Wayne-Orange County Airport (3.1 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    73.8 °F
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