Granite Bay State Marine Park Weather Forecast

    • 30
    • 35

    Chance Snow

    • 18
    • 31

    Mostly Cloudy

    • 14
    • 20

    Mostly Sunny

    • 15
    • 15

    Partly Sunny

    • 9
    • 21

    Chance Snow

    • 11
    • 17

    Chance Snow

    • 25
    • 30

    Rain/Snow

Today 30 Dec West Prince William Sound & Whittier

Widespread snow Showers in the Morning, then partly cloudy in the afternoon. Blowing snow in the afternoon. Visibility one quarter mile or less at Times in the afternoon. Snow accumulation up to 1 inch. Highs in the 30s. West wind 10 to 25 Mph with Gusts to 35 Mph.

Tonight 30 Dec West Prince William Sound & Whittier

Mostly cloudy with a chance of snow. Blowing snow. Visibility one quarter mile or less at Times. Lows in the 20s to lower 30s. Northwest wind 10 to 25 Mph with Gusts to 40 Mph.

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  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

December Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 22 December, 2025

    -11.9 °F

  • Average December

    11.4 °F

  • Highest 2 December, 2025

    41 °F

Climate (2021–Present)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2025

    33 °F

  • Average 2021–2025

    38.9 °F

  • Average High 2021–2025

    44.4 °F
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