Granite Bay State Marine Park Weather Forecast

    • 39
    • 40

    Rain

    • 35
    • 41

    Rain

    • 31
    • 39

    Chance Rain

    • 30
    • 38

    Partly Sunny

    • 34
    • 39

    Rain Likely

    • 36
    • 41

    Rain Likely

Today 19 Oct West Prince William Sound & Whittier

Rain. Rain may be heavy at Times in the morning. Highs in the lower 40s. Southeast wind 10 to 25 Mph with Gusts to 40 Mph shifting to the north 10 to 20 Mph with Gusts to 30 Mph in the afternoon.

Tonight 19 Oct West Prince William Sound & Whittier

Rain. Rain may be heavy at Times after midnight. Lows in the lower 40s. North wind 15 Mph. Gusts to 40 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

    41.4 °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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