Island Weather Forecast

    • 71
    • 94

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 72
    • 96

    Mostly Sunny

    • 68
    • 94

    Partly Sunny

    • 65
    • 82

    Chance Rain Showers

    • 62
    • 74

    Chance Thunderstorms

Today 21 Aug Sebastian

Sunny. Highs in the mid 90s. Northeast Winds around 5 Mph.

Tonight 21 Aug Sebastian

Partly cloudy in the Evening, then becoming mostly clear. Lows around 70. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Temperature Statistics

August Temperature

Fort Smith Regional Airport (14.3 miles)

  • Lowest 3 August, 2025

    70.6 °F

  • Average August

    85 °F

  • Highest 17 August, 2025

    102.7 °F

Climate (2020–Present)

Fort Smith Regional Airport (14.3 miles)

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  • Average Low 2020–2025

    53.5 °F

  • Average 2020–2025

    63.8 °F

  • Average High 2020–2025

    75 °F
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