Upper Newport Bay Weather Forecast

    • 67
    • 85

    Patchy Fog

    • 68
    • 85

    Decreasing Clouds

    • 69
    • 88

    Partly Sunny

    • 70
    • 88

    Mostly Cloudy

    • 67
    • 82

    Partly Sunny

    • 66
    • 79

    Mostly Sunny

    • 69
    • 85

    Mostly Sunny

Today 23 Sep Orange County Coastal

Partly cloudy in the morning. Becoming mostly sunny. Highs 80 to 84 at the Beaches to 85 to 89 farther inland and near higher coastal Terrain.

Tonight 23 Sep Orange County Coastal

Partly cloudy. Patchy fog overnight. Lows 64 to 68. Areas of Winds south to 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Newport Bay Temperature Statistics

September Temperature

John Wayne-Orange County Airport (2.5 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    76.6 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (2.5 miles)

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  • Average Low 2021–2026

    59.1 °F

  • Average 2021–2026

    66.2 °F

  • Average High 2021–2026

    73.8 °F
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