Monarch Beach Weather Forecast

    • 66
    • 74

    Patchy Fog

    • 67
    • 79

    Patchy Fog

    • 68
    • 77

    Patchy Fog

    • 68
    • 78

    Partly Sunny

    • 67
    • 77

    Partly Sunny

Today 15 Sep Orange County Coastal

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 73 to 77 at the Beaches to 79 to 84 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 15 Sep Orange County Coastal

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 63 to 66. Areas of Winds southwest to 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 12 September, 2025

    64.9 °F

  • Average September

    72.8 °F

  • Highest 3 September, 2025

    86 °F

Climate (2020–Present)

John Wayne-Orange County Airport (15.5 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.7 °F

  • Average High 2020–2025

    73.6 °F
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