Na'Pali Coast State Park Weather Forecast

    • 68
    • 81

    Rain Showers

    • 68
    • 80

    Rain Showers

    • 68
    • 81

    Rain Showers

    • 68
    • 81

    Rain Showers

    • 67
    • 80

    Rain Showers

    • 67
    • 81

    Partly Sunny

    • 67
    • 81

    Mostly Cloudy

Today 19 Sep Kauai Mountains

Mostly cloudy. Scattered Showers late in the Morning, then numerous Showers and slight chance of Thunderstorms in the afternoon. Locally heavy rainfall possible late in the afternoon. Highs 76 to 86 in the Valleys to around 68 above 4000 feet. Northeast Winds 10 to 15 Mph. Chance of rain 60 percent.

Tonight 19 Sep Kauai Mountains

Breezy. Frequent Showers and slight chance of Thunderstorms in the Evening, then frequent Showers after midnight. Locally heavy rainfall possible. Lows 65 to 72 in the Valleys to around 60 above 4000 feet. Northeast Winds 10 to 20 Mph. Chance of rain near 100 percent.

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Na'Pali Coast State Park Temperature Statistics

September Temperature

Kekaha, Pacific Missile Test Facility Barking Sands (13 miles)

  • Lowest 5 September, 2025

    70 °F

  • Average September

    79.8 °F

  • Highest 1 September, 2025

    88 °F

Climate (2020–Present)

Kekaha, Pacific Missile Test Facility Barking Sands (13 miles)

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  • Average Low 2020–2025

    69.9 °F

  • Average 2020–2025

    76.7 °F

  • Average High 2020–2025

    83.1 °F
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