Santa Ana River Mouth Weather Forecast

    • 69
    • 74

    Rain Showers Likely

    • 69
    • 76

    Rain Showers Likely

    • 67
    • 75

    Chance Rain Showers

    • 68
    • 75

    Partly Sunny

    • 69
    • 77

    Partly Sunny

    • 69
    • 77

    Partly Sunny

Today 17 Sep Orange County Coastal

Partly cloudy. A slight chance of Showers and Thunderstorms in the afternoon. Highs 75 to 79 at the Beaches to 81 to 84 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph in the afternoon. Chance of measurable precipitation 20 percent.

Tonight 17 Sep Orange County Coastal

Partly cloudy in the evening. Becoming mostly cloudy. A slight chance of Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers overnight. Lows 66 to 69. Light Winds. Chance of measurable precipitation 40 percent.

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  • Temperature Real-Time

Santa Ana River Mouth Temperature Statistics

September Temperature

John Wayne-Orange County Airport (6.2 miles)

  • Lowest 12 September, 2025

    64.9 °F

  • Average September

    72.7 °F

  • Highest 3 September, 2025

    86 °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

    65.7 °F

  • Average High 2020–2025

    73.6 °F
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