Granite Bay State Marine Park Weather Forecast

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    • 54

    Chance Rain

    • 48
    • 58

    Partly Sunny

    • 47
    • 58

    Mostly Cloudy

    • 47
    • 56

    Chance Rain Showers

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    • 56

    Chance Rain Showers

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    Rain Showers Likely

Today 30 Jun West Prince William Sound & Whittier

Rain likely in the Morning, then numerous Showers in the afternoon. Highs in the lower 50s. Variable wind 10 Mph with Gusts to 25 Mph.

Tonight 30 Jun West Prince William Sound & Whittier

Mostly clear. Lows in the upper 40s. West wind 15 Mph. Gusts to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • 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

    52.3 °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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