Granite Bay State Marine Park Weather Forecast

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    Rain

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    Rain

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    Rain

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    Rain Showers

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    Rain Showers

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    Rain Showers

Today 11 Jul West Prince William Sound & Whittier

Partly sunny with a slight chance of rain. Highs in the mid 50s. Light Winds becoming variable 10 Mph in the afternoon.

Tonight 11 Jul West Prince William Sound & Whittier

Rain. Lows in the upper 40s. Variable wind 10 Mph. Gusts to 20 Mph after midnight.

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Granite Bay State Marine Park Temperature Statistics

July Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 1 July, 2026

    34 °F

  • Average July

    51.7 °F

  • Highest 6 July, 2026

    68 °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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