Monarch Beach Weather Forecast

    • 55
    • 71

    Mostly Sunny

    • 54
    • 67

    Partly Sunny

    • 54
    • 64

    Mostly Cloudy

    • 54
    • 64

    Mostly Cloudy

    • 54
    • 65

    Mostly Cloudy

    • 56
    • 63

    Rain Likely

Today 18 Dec Orange County Coastal

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Local visibility one quarter mile or less at Times this morning. Warmer. Highs 70 to 74 at the Beaches to 74 to 78 farther inland and near higher coastal Terrain. Light Winds.

Tonight 18 Dec Orange County Coastal

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 52 to 55. Light Winds.

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Monarch Beach Temperature Statistics

December Temperature

John Wayne-Orange County Airport (15.5 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    59.8 °F

  • Highest 9 December, 2025

    82 °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

    65.6 °F

  • Average High 2020–2025

    73.4 °F
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