Granite Bay State Marine Park Weather Forecast

    • 40
    • 46

    Rain Showers

    • 35
    • 46

    Slight Chance Rain Showers

    • 37
    • 45

    Rain

    • 36
    • 43

    Rain

    • 37
    • 44

    Rain

    • 36
    • 43

    Rain

Today 7 Oct West Prince William Sound & Whittier

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

Tonight 7 Oct West Prince William Sound & Whittier

Numerous Showers in the Evening, then scattered Showers after midnight. Lows in the lower 40s. Variable wind 10 Mph.

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  • 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

    39.7 °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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