Costa Mesa Weather Forecast

    • 55
    • 70

    Increasing Clouds

    • 56
    • 71

    Partly Sunny

    • 57
    • 72

    Partly Sunny

    • 57
    • 73

    Mostly Sunny

    • 58
    • 74

    Mostly Sunny

    • 59
    • 76

    Mostly Sunny

Today 6 May Orange County Coastal

Mostly sunny. Highs around 67 at the Beaches to 68 to 72 farther inland and near higher coastal Terrain. Areas of Winds south 10 to 15 Mph. Gusts to 25 Mph this afternoon.

Tonight 6 May Orange County Coastal

Partly cloudy. Patchy fog overnight. Lows 53 to 56. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

May Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 4 May, 2026

    57 °F

  • Average May

    64.9 °F

  • Highest 1 May, 2026

    72.6 °F

Climate (2021–Present)

John Wayne-Orange County Airport (3.7 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66 °F

  • Average High 2021–2026

    73.7 °F
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