Costa Mesa Weather Forecast

    • 63
    • 72

    Increasing Clouds

    • 62
    • 72

    Increasing Clouds

    • 63
    • 72

    Partly Sunny

    • 62
    • 73

    Partly Sunny

    • 62
    • 73

    Partly Sunny

    • 62
    • 73

    Partly Sunny

    • 63
    • 74

    Partly Sunny

Today 1 Jul Orange County Coastal

Mostly cloudy this morning. Becoming mostly sunny. Highs 68 to 73. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 1 Jul Orange County Coastal

Partly cloudy this evening. Becoming cloudy. Lows 61 to 64. Areas of Winds west 10 Mph this evening becoming light.

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Costa Mesa Temperature Statistics

July Temperature

John Wayne-Orange County Airport (3.7 miles)

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  • Average July

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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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