Granite Bay State Marine Park Weather Forecast

    • 55
    • 60

    Rain

    • 53
    • 57

    Rain

    • 51
    • 56

    Rain

    • 51
    • 57

    Rain Showers

    • 51
    • 58

    Rain Showers Likely

    • 50
    • 59

    Rain Showers

Today 16 Aug West Prince William Sound & Whittier

Rain. Rain may be heavy at Times in the afternoon. Highs in the upper 50s. East wind 10 to 25 Mph with Gusts to 35 Mph.

Tonight 16 Aug West Prince William Sound & Whittier

Rain in the Evening, then widespread Showers after midnight. Precipitation may be heavy at Times. Lows in the lower 50s. Southeast wind 15 to 30 Mph with Gusts to 40 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

    56.8 °F

  • Highest 1 August, 2026

    73 °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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