Granite Bay State Marine Park Weather Forecast

    • 35
    • 46

    Mostly Sunny

    • 38
    • 45

    Rain

    • 39
    • 42

    Rain

    • 37
    • 45

    Rain

    • 35
    • 44

    Rain

    • 35
    • 43

    Rain/Snow Likely

Today 8 Oct West Prince William Sound & Whittier

Partly cloudy. Isolated rain Showers in the morning. Highs in the mid 40s. Light Winds becoming variable 10 Mph in the afternoon.

Tonight 8 Oct West Prince William Sound & Whittier

Mostly clear. Lows around 40. Variable wind 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

October Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 2 October, 2026

    30.9 °F

  • Average October

    40.7 °F

  • Highest 4 October, 2026

    48 °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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