Granite Bay State Marine Park Weather Forecast

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    Rain Showers

    • 35
    • 45

    Rain Showers

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    Rain

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    Rain

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    • 43

    Rain

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    Chance Rain

Today 12 Oct West Prince William Sound & Whittier

Mostly cloudy with a chance of rain Showers. Highs in the upper 40s. Light Winds becoming variable 10 Mph in the afternoon.

Tonight 12 Oct West Prince William Sound & Whittier

A chance of rain Showers in the Evening, then rain Showers likely after midnight. Lows in the upper 30s. Light Winds.

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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

    41.7 °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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