Granite Bay State Marine Park Weather Forecast

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    • 60

    Mostly Cloudy

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    Mostly Cloudy

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    • 63

    Mostly Cloudy

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    • 60

    Cloudy

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    Chance Rain Showers

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    Chance Rain Showers

Today 18 Jun West Prince William Sound & Whittier

Mostly cloudy. Highs in the 50s. Variable wind 10 Mph.

Tonight 18 Jun West Prince William Sound & Whittier

Mostly cloudy with isolated Showers. Lows in the upper 40s. Variable wind 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

June Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 16 June, 2026

    34 °F

  • Average June

    51.6 °F

  • Highest 4 June, 2026

    75.9 °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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