Granite Bay State Marine Park Weather Forecast

    • 51
    • 53

    Rain

    • 50
    • 60

    Mostly Sunny

    • 53
    • 63

    Mostly Cloudy

    • 50
    • 57

    Rain Showers Likely

    • 51
    • 63

    Chance Rain Showers

    • 51
    • 62

    Chance Rain Showers

Today 22 Aug West Prince William Sound & Whittier

Rain. Highs in the lower 50s. Southeast wind 15 Mph with Gusts to 25 Mph.

Tonight 22 Aug West Prince William Sound & Whittier

Rain in the Evening, then scattered Showers after midnight. Lows in the lower 50s. Northeast wind 15 Mph with Gusts to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

August Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 8 August, 2026

    42.1 °F

  • Average August

    56.4 °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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