Santa Ana River Mouth (Inside) Weather Forecast

    • 53
    • 66

    Patchy Fog

    • 55
    • 68

    Partly Sunny

    • 56
    • 71

    Partly Sunny

    • 56
    • 69

    Patchy Fog

    • 55
    • 66

    Patchy Fog

    • 55
    • 66

    Mostly Cloudy

Today 16 Dec Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Areas of fog this morning. Local visibility one quarter mile or less at Times this morning. Warmer. Highs 66 to 69 at the Beaches to 70 to 74 farther inland and near higher coastal Terrain. Light Winds.

Tonight 16 Dec Orange County Coastal

Partly cloudy. Patchy fog overnight. Local visibility one quarter mile or less at Times overnight. Lows 50 to 53. Light Winds.

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Santa Ana River Mouth (Inside) Temperature Statistics

December Temperature

John Wayne-Orange County Airport (5.6 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    60.4 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (5.6 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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