Granite Bay State Marine Park Weather Forecast

    • 44
    • 47

    Rain Showers

    • 42
    • 46

    Rain Showers

    • 40
    • 45

    Rain

    • 36
    • 47

    Slight Chance Rain

    • 37
    • 46

    Chance Rain

    • 40
    • 45

    Rain

Today 5 Oct West Prince William Sound & Whittier

Showers likely in the Morning, then widespread Showers in the afternoon. Highs in the upper 40s. Variable wind 10 Mph with Gusts to 20 Mph.

Tonight 5 Oct West Prince William Sound & Whittier

Widespread Showers. Lows in the mid 40s. Variable wind 10 Mph. Gusts to 20 Mph in the evening.

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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

    36.5 °F

  • Highest 2 October, 2026

    43 °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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