Costa Mesa Weather Forecast

    • 55
    • 70

    Increasing Clouds

    • 54
    • 70

    Mostly Cloudy

    • 56
    • 76

    Mostly Sunny

    • 56
    • 77

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 54
    • 71

    Partly Sunny

Today 15 Apr Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Highs around 70 at the Beaches to 70 to 74 farther inland and near higher coastal Terrain. Areas of Winds south 10 to 15 Mph.

Tonight 15 Apr Orange County Coastal

Partly cloudy in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 52 to 55. Areas of Winds west to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

April Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 4 April, 2026

    55.7 °F

  • Average April

    67.3 °F

  • Highest 4 April, 2026

    86.6 °F

Climate (2021–Present)

John Wayne-Orange County Airport (3.7 miles)

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

  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66 °F

  • Average High 2021–2026

    73.7 °F
Get WillyWeather+ to remove ads