Newport Bay - Harbor Island Weather Forecast

    • 65
    • 73

    Increasing Clouds

    • 65
    • 74

    Mostly Cloudy

    • 65
    • 75

    Patchy Fog

    • 66
    • 77

    Patchy Fog

    • 67
    • 79

    Patchy Fog

    • 67
    • 79

    Patchy Fog

Today 13 Sep Orange County Coastal

Cloudy in the morning. Becoming mostly sunny. Highs 71 to 74 at the Beaches to 75 to 78 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 13 Sep Orange County Coastal

Mostly clear in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 61 to 65. Areas of Winds southwest 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Newport Bay - Harbor Island Temperature Statistics

September Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 5 September, 2025

    66.9 °F

  • Average September

    73.8 °F

  • Highest 3 September, 2025

    86 °F

Climate (2020–Present)

John Wayne-Orange County Airport (5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.7 °F

  • Average High 2020–2025

    73.6 °F
Get WillyWeather+ to remove ads