Costa Mesa Weather Forecast

    • 65
    • 91

    Sunny

    • 65
    • 88

    Sunny

    • 64
    • 85

    Sunny

    • 63
    • 83

    Mostly Sunny

    • 63
    • 79

    Patchy Fog

    • 63
    • 78

    Patchy Fog

Today 30 Sep Orange County Coastal

Sunny, warmer. Highs 85 to 90 at the Beaches to 93 to 98 farther inland and near higher coastal Terrain. Light Winds.

Tonight 30 Sep Orange County Coastal

Clear. Lows 63 to 68. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

September Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 11 September, 2020

    61 °F

  • Average September

    72.8 °F

  • Highest 5 September, 2020

    102.9 °F

Climate (2010–Present)

John Wayne-Orange County Airport (3.7 miles)

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  • Average Low 2010–Present

    59.2 °F

  • Average 2010–Present

    65.5 °F

  • Average High 2010–Present

    73.7 °F
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