Smith Island Weather Forecast

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    Rain Showers

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    Rain Showers

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    Chance Rain

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    Chance Rain

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    Chance Rain

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    Chance Rain

Today 18 Sep West Prince William Sound & Whittier

Widespread Showers. Highs in the lower 50s. East wind 10 to 20 Mph.

Tonight 18 Sep West Prince William Sound & Whittier

Widespread Showers. Lows in the mid 40s. Northeast wind 15 Mph with Gusts to 25 Mph.

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Smith Island Temperature Statistics

September Temperature

Portage, Portage Glacier (54.1 miles)

  • Lowest 15 September, 2025

    41 °F

  • Average September

    51.9 °F

  • Highest 4 September, 2025

    64 °F

Climate (2020–Present)

Portage, Portage Glacier (54.1 miles)

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  • Average Low 2020–2025

    33.5 °F

  • Average 2020–2025

    39.4 °F

  • Average High 2020–2025

    45 °F
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