Granite Bay State Marine Park Weather Forecast

    • 50
    • 54

    Rain

    • 48
    • 58

    Rain Likely

    • 50
    • 65

    Mostly Cloudy

    • 49
    • 62

    Chance Rain Showers

    • 48
    • 57

    Rain Showers Likely

    • 48
    • 58

    Chance Rain Showers

Today 4 Jul West Prince William Sound & Whittier

Cloudy with a chance of rain. Highs in the lower 50s. Southeast wind 10 to 15 Mph.

Tonight 4 Jul West Prince William Sound & Whittier

Rain. Lows around 50. East wind 10 to 15 Mph with Gusts to 25 Mph.

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  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

July Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 1 July, 2026

    34 °F

  • Average July

    52.4 °F

  • Highest 1 July, 2026

    64 °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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