Granite Bay State Marine Park Weather Forecast

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    Rain

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    Chance Rain

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    Mostly Cloudy

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    Mostly Cloudy

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    Rain Likely

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    Rain Likely

Today 21 May West Prince William Sound & Whittier

Rain. Highs in the mid 40s. East wind 15 Mph with Gusts to 25 Mph.

Tonight 21 May West Prince William Sound & Whittier

Rain. Lows in the lower 40s. East wind 15 Mph with Gusts to 25 Mph.

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Granite Bay State Marine Park Temperature Statistics

May Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 9 May, 2025

    28.9 °F

  • Average May

    43.6 °F

  • Highest 10 May, 2025

    62.7 °F

Climate (2020–Present)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    39.1 °F

  • Average High 2020–2025

    44.6 °F
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