Granite Bay State Marine Park Weather Forecast

    • 50
    • 59

    Partly Sunny

    • 50
    • 61

    Partly Sunny

    • 50
    • 60

    Rain

    • 51
    • 57

    Rain Likely

    • 50
    • 56

    Rain Showers Likely

    • 50
    • 55

    Rain Showers Likely

    • 50
    • 55

    Rain Showers Likely

Today 2 Sep West Prince William Sound & Whittier

Sunny. Highs in the upper 50s. Northwest wind 15 to 30 Mph with Gusts to 40 Mph.

Tonight 2 Sep West Prince William Sound & Whittier

Mostly clear. Lows in the mid 40s to lower 50s. Northwest wind 10 to 25 Mph.

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Granite Bay State Marine Park Temperature Statistics

September Temperature

Portage, Portage Glacier (25.5 miles)

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  • Average September

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Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    43.7 °F
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