Granite Bay State Marine Park Weather Forecast

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    Rain

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    Rain Likely

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    Rain

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    Rain Showers

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    Rain Showers

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    Rain Showers

Today 17 Aug West Prince William Sound & Whittier

Rain likely in the Morning, then a chance of rain in the afternoon. Highs in the upper 50s. South wind 10 to 15 Mph with Gusts to 25 Mph.

Tonight 17 Aug West Prince William Sound & Whittier

Mostly cloudy with a chance of rain. Lows around 50. South wind 15 Mph.

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Granite Bay State Marine Park Temperature Statistics

August Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 8 August, 2026

    42.1 °F

  • Average August

    56.9 °F

  • Highest 14 August, 2026

    73.9 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    43.7 °F
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