Poipu Beach Weather Forecast

    • 77
    • 87

    Rain Showers

    • 77
    • 87

    Rain Showers

    • 77
    • 87

    Rain Showers

    • 77
    • 87

    Rain Showers

    • 77
    • 86

    Rain Showers

    • 75
    • 86

    Rain Showers

    • 76
    • 87

    Rain Showers

Today 17 Sep Kauai South

Partly sunny. Numerous Showers in the Morning, then scattered Showers in the afternoon. Highs 83 to 91. Northeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 17 Sep Kauai South

Mostly cloudy with scattered Showers. Lows around 75. Northeast Winds 10 to 15 Mph. Chance of rain 50 percent.

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Poipu Beach Temperature Statistics

September Temperature

Lihue, Lihue Airport (10.6 miles)

  • Lowest 7 September, 2025

    71.1 °F

  • Average September

    79.7 °F

  • Highest 12 September, 2025

    86 °F

Climate (2020–Present)

Lihue, Lihue Airport (10.6 miles)

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  • Average Low 2020–2025

    71.8 °F

  • Average 2020–2025

    76.5 °F

  • Average High 2020–2025

    82.1 °F
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