Surprise Cove State Marine Park Weather Forecast

    • 48
    • 56

    Chance Rain

    • 47
    • 52

    Rain

    • 47
    • 50

    Rain

    • 46
    • 53

    Rain Showers Likely

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    • 56

    Rain Showers Likely

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    Chance Rain Showers

Today 5 Sep West Prince William Sound & Whittier

Mostly cloudy. A slight chance of rain in the morning. Highs in the upper 50s. Variable wind 10 Mph. Gusts to 20 Mph in the morning.

Tonight 5 Sep West Prince William Sound & Whittier

Mostly cloudy with a chance of rain. Lows in the lower 50s. Light Winds.

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Surprise Cove State Marine Park Temperature Statistics

September Temperature

Portage, Portage Glacier (14.9 miles)

  • Lowest 2 September, 2026

    30.9 °F

  • Average September

    49.4 °F

  • Highest 3 September, 2026

    66 °F

Climate (2021–2026)

Portage, Portage Glacier (14.9 miles)

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  • Average Low 2021–2026

    32.1 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    43.7 °F
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