Granite Bay State Marine Park Weather Forecast

    • 49
    • 56

    Rain

    • 48
    • 54

    Rain

    • 48
    • 55

    Rain Showers

    • 49
    • 59

    Rain Showers Likely

    • 51
    • 63

    Partly Sunny

    • 51
    • 63

    Partly Sunny

Today 20 Jul West Prince William Sound & Whittier

Rain. Rain may be heavy at Times in the morning. Highs in the mid 50s. Southeast wind 10 to 15 Mph with Gusts to 25 Mph.

Tonight 20 Jul West Prince William Sound & Whittier

Mostly cloudy with a chance of rain. Lows in the upper 40s. Southwest wind 15 Mph.

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Granite Bay State Marine Park Temperature Statistics

July Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 1 July, 2026

    34 °F

  • Average July

    52.2 °F

  • Highest 6 July, 2026

    68 °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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