Granite Bay State Marine Park Weather Forecast

    • 53
    • 56

    Rain

    • 53
    • 56

    Rain

    • 48
    • 55

    Rain

    • 50
    • 55

    Mostly Cloudy

    • 50
    • 55

    Rain Likely

    • 50
    • 57

    Rain Likely

    • 51
    • 60

    Chance Rain

Today 27 Aug West Prince William Sound & Whittier

A chance of rain in the Morning, then rain in the afternoon. Highs in the 50s. Southeast wind 15 Mph.

Tonight 27 Aug West Prince William Sound & Whittier

Rain. Rain may be heavy at Times after midnight. Lows in the lower 50s. East wind 10 to 20 Mph. Gusts to 30 Mph.

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  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

August Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 4 August, 2025

    39.7 °F

  • Average August

    54.4 °F

  • Highest 22 August, 2025

    69.7 °F

Climate (2020–Present)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    39.2 °F

  • Average High 2020–2025

    44.8 °F
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