Granite Bay State Marine Park Weather Forecast

    • 52
    • 67

    Partly Sunny

    • 52
    • 66

    Partly Sunny

    • 52
    • 64

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

    • 53
    • 64

    Chance Rain Showers

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    • 62

    Chance Rain Showers

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    Rain Showers

Today 7 Aug West Prince William Sound & Whittier

Partly cloudy. Highs in the upper 50s to mid 60s. Southwest wind 15 Mph. Gusts to 35 Mph increasing to 25 Mph in the afternoon.

Tonight 7 Aug West Prince William Sound & Whittier

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 50s. Variable wind 10 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 1 August, 2026

    46 °F

  • Average August

    56.4 °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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