Granite Bay State Marine Park Weather Forecast

    • 50
    • 61

    Mostly Sunny

    • 54
    • 62

    Rain Likely

    • 50
    • 56

    Rain

    • 50
    • 62

    Chance Rain Showers

    • 51
    • 63

    Chance Rain Showers

    • 50
    • 58

    Rain Showers Likely

Today 23 Aug West Prince William Sound & Whittier

Partly cloudy with scattered Showers in the Morning, then sunny in the afternoon. Highs in the upper 50s. Northwest wind 15 Mph with Gusts to 25 Mph.

Tonight 23 Aug West Prince William Sound & Whittier

Clear. Lows in the upper 40s to mid 50s. West wind 15 Mph with Gusts to 25 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

    56.3 °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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