Bonita Reservoir Weather Forecast

    • 69
    • 85

    Increasing Clouds

    • 66
    • 82

    Patchy Fog

    • 65
    • 79

    Mostly Sunny

    • 64
    • 79

    Mostly Sunny

    • 62
    • 77

    Mostly Sunny

    • 63
    • 78

    Mostly Sunny

Today 11 Sep Orange County Coastal

Mostly sunny. Highs 80 to 84 at the Beaches to 85 to 90 farther inland and near higher coastal Terrain. Areas of Winds south 10 Mph.

Tonight 11 Sep Orange County Coastal

Mostly clear in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 66 to 70. Light Winds becoming southeast 10 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bonita Reservoir Temperature Statistics

September Temperature

John Wayne-Orange County Airport (3.1 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    76.3 °F

  • Highest 8 September, 2026

    98.1 °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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