Ko Olina Beach Weather Forecast

    • 78
    • 84

    Rain Showers

    • 77
    • 84

    Mostly Sunny

    • 77
    • 85

    Mostly Sunny

    • 76
    • 85

    Mostly Sunny

    • 76
    • 84

    Mostly Sunny

    • 77
    • 84

    Mostly Sunny

Today 11 Sep Waianae Coast

Mostly sunny with isolated Showers. Highs 87 to 92. East Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 11 Sep Waianae Coast

Partly cloudy. Isolated Showers in the evening. Lows around 76. East Winds 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ko Olina Beach Temperature Statistics

September Temperature

Oahu, Kalaeloa Airport (3.7 miles)

  • Lowest 4 September, 2025

    69.1 °F

  • Average September

    79.4 °F

  • Highest 9 September, 2025

    89.1 °F

Climate (2020–Present)

Oahu, Kalaeloa Airport (3.7 miles)

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  • Average Low 2020–2025

    70.3 °F

  • Average 2020–2025

    77.8 °F

  • Average High 2020–2025

    85.6 °F
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