Santa Ana River Mouth Weather Forecast

    • 54
    • 66

    Partly Sunny

    • 55
    • 71

    Partly Sunny

    • 55
    • 68

    Patchy Fog

    • 55
    • 66

    Patchy Fog

    • 55
    • 67

    Mostly Cloudy

    • 55
    • 67

    Mostly Cloudy

Today 17 Dec Orange County Coastal

Mostly cloudy with patchy fog in the morning. Becoming partly cloudy. Highs 67 to 71. Light Winds.

Tonight 17 Dec Orange County Coastal

Partly cloudy. Patchy fog. Lows 51 to 54. Areas of Winds southeast 10 Mph in the evening becoming light.

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Santa Ana River Mouth Temperature Statistics

December Temperature

John Wayne-Orange County Airport (6.2 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    60.2 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (6.2 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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