Granite Bay State Marine Park Weather Forecast

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    Rain Showers

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    Rain

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    Rain

Today 30 Oct West Prince William Sound & Whittier

Rain and a slight chance of snow. Highs in the mid 40s.

Tonight 30 Oct West Prince William Sound & Whittier

Scattered rain Showers in the Evening, then widespread rain Showers after midnight. Lows around 40. South wind 15 to 30 Mph decreasing to 10 to 15 Mph after midnight.

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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 23 October, 2026

    19.9 °F

  • Average October

    39 °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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