Granite Bay State Marine Park Weather Forecast

    • 35
    • 37

    Mostly Cloudy

    • 36
    • 41

    Rain

    • 36
    • 42

    Rain

    • 37
    • 43

    Partly Sunny

    • 38
    • 46

    Partly Sunny

    • 37
    • 43

    Mostly Cloudy

    • 38
    • 42

    Chance Rain

Today 23 Oct West Prince William Sound & Whittier

Partly sunny. A slight chance of rain Showers in the afternoon. Highs in the upper 30s. Northeast wind 15 Mph.

Tonight 23 Oct West Prince William Sound & Whittier

Mostly cloudy with a slight chance of rain Showers. Lows in the mid 30s to lower 40s. Variable wind 10 Mph with Gusts to 20 Mph.

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  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

October Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 18 October, 2026

    28.9 °F

  • Average October

    40.4 °F

  • Highest 15 October, 2026

    50 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.3 °F

  • Average 2021–2026

    38.3 °F

  • Average High 2021–2026

    43.9 °F
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