Costa Mesa Weather Forecast

    • 67
    • 83

    Mostly Sunny

    • 67
    • 84

    Mostly Sunny

    • 65
    • 82

    Mostly Sunny

    • 63
    • 77

    Patchy Fog

    • 62
    • 75

    Patchy Fog

    • 62
    • 76

    Patchy Fog

Today 27 Sep Orange County Coastal

Mostly sunny. Highs in the lower 80s at the Beaches to this upper 80s farther inland and near higher coastal Terrain. Light Winds.

Tonight 27 Sep Orange County Coastal

Mostly clear. Lows in the upper 60s. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

September Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 22 September, 2022

    64.9 °F

  • Average September

    78.5 °F

  • Highest 4 September, 2022

    104 °F

Climate (2010–Present)

John Wayne-Orange County Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2010–Present

    59.4 °F

  • Average 2010–Present

    65.8 °F

  • Average High 2010–Present

    74.2 °F
Get an account to remove ads