Granite Bay State Marine Park Weather Forecast

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    • 43

    Rain

    • 39
    • 45

    Rain

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    • 49

    Rain

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    • 44

    Rain

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    • 43

    Rain Likely

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    Slight Chance Rain/Snow

Today 13 Oct West Prince William Sound & Whittier

Rain Showers. Highs in the mid 40s. North wind 15 Mph.

Tonight 13 Oct West Prince William Sound & Whittier

Mostly cloudy. A slight chance of rain in the evening. Lows in the mid 30s to lower 40s. North wind 15 Mph.

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Granite Bay State Marine Park Temperature Statistics

October Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 2 October, 2026

    30.9 °F

  • Average October

    41.6 °F

  • Highest 9 October, 2026

    48.9 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.2 °F

  • Average High 2021–2026

    43.9 °F
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