Monarch Beach Weather Forecast

    • 64
    • 74

    Becoming Sunny

    • 67
    • 78

    Mostly Sunny

    • 68
    • 78

    Mostly Sunny

    • 70
    • 81

    Mostly Sunny

    • 73
    • 84

    Mostly Sunny

    • 73
    • 86

    Mostly Sunny

Today 28 Sep Orange County Coastal

Partly cloudy this morning. Becoming sunny. Highs around 75 at the Beaches to 76 to 79 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 28 Sep Orange County Coastal

Mostly clear. Lows 60 to 65. Areas of Winds west 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monarch Beach Temperature Statistics

September Temperature

John Wayne-Orange County Airport (15.5 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    76.3 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (15.5 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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