Granite Bay State Marine Park Weather Forecast

    • 53
    • 61

    Partly Sunny

    • 53
    • 58

    Increasing Clouds

    • 53
    • 63

    Mostly Cloudy

    • 52
    • 63

    Chance Rain Showers

    • 54
    • 67

    Mostly Cloudy

    • 54
    • 67

    Mostly Cloudy

    • 54
    • 64

    Chance Rain Showers

Today 9 Aug West Prince William Sound & Whittier

Partly sunny. Areas of fog in the morning. Haze. Highs around 60. Light Winds.

Tonight 9 Aug West Prince William Sound & Whittier

Mostly cloudy in the evening then becoming partly cloudy. Haze. Areas of fog after midnight. Lows in the lower 50s. West wind 15 Mph. Gusts to 25 Mph after midnight.

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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

    32.1 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    43.7 °F
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