Costa Mesa Weather Forecast

    • 68
    • 91

    Mostly Sunny

    • 67
    • 85

    Increasing Clouds

    • 66
    • 82

    Partly Sunny

    • 65
    • 77

    Chance Rain Showers

    • 60
    • 74

    Rain Showers Likely

    • 58
    • 71

    Chance Rain Showers

    • 58
    • 72

    Slight Chance Rain Showers

Today 7 Oct Orange County Coastal

Partly cloudy in the morning. Becoming mostly sunny. Highs 72 to 77.

Tonight 7 Oct Orange County Coastal

Mostly clear this evening. Becoming partly cloudy. Lows around 68. Areas of Winds west to 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

October Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 1 October, 2026

    67.6 °F

  • Average October

    84.1 °F

  • Highest 3 October, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (3.7 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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