Granite Bay State Marine Park Weather Forecast

    • 44
    • 47

    Rain Showers

    • 40
    • 46

    Rain Showers

    • 35
    • 46

    Slight Chance Rain Showers

    • 37
    • 45

    Rain

    • 37
    • 45

    Rain

    • 37
    • 45

    Rain

Today 6 Oct West Prince William Sound & Whittier

Numerous Showers in the Morning, then scattered Showers in the afternoon. Highs in the upper 40s. Variable wind 10 Mph.

Tonight 6 Oct West Prince William Sound & Whittier

Mostly cloudy with scattered Showers. Lows in the mid 40s. Variable wind 10 Mph.

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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

    37.7 °F

  • Highest 3 October, 2026

    44.1 °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

    43.8 °F
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