Costa Mesa Weather Forecast

    • 62
    • 72

    Increasing Clouds

    • 61
    • 71

    Partly Sunny

    • 60
    • 72

    Mostly Cloudy

    • 59
    • 73

    Partly Sunny

    • 59
    • 71

    Partly Sunny

    • 61
    • 72

    Partly Sunny

    • 63
    • 74

    Mostly Sunny

Today 17 Jun Orange County Coastal

Cloudy this morning. Becoming mostly sunny. Highs 69 to 74. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 17 Jun Orange County Coastal

Partly cloudy this evening. Becoming cloudy. Lows 59 to 63. Areas of Winds west 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

June Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 2 June, 2026

    62.7 °F

  • Average June

    69.5 °F

  • Highest 12 June, 2026

    82.7 °F

Climate (2021–2026)

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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