Granite Bay State Marine Park Weather Forecast

    • 41
    • 45

    Rain

    • 40
    • 42

    Rain

    • 35
    • 47

    Chance Rain

    • 36
    • 42

    Rain

    • 36
    • 42

    Rain

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    • 44

    Rain

Today 15 Oct West Prince William Sound & Whittier

Rain. Rain may be heavy at Times in the afternoon. Highs in the upper 40s. East wind 20 to 35 Mph. Gusts to 50 Mph decreasing to 40 Mph in the afternoon.

Tonight 15 Oct West Prince William Sound & Whittier

Widespread rain Showers. Lows in the lower 40s. South wind 10 to 20 Mph with Gusts to 30 Mph.

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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

    41.4 °F

  • Highest 9 October, 2026

    48.9 °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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