Granite Bay State Marine Park Weather Forecast

    • 48
    • 54

    Rain Likely

    • 47
    • 57

    Chance Rain

    • 48
    • 61

    Mostly Cloudy

    • 47
    • 58

    Mostly Cloudy

    • 47
    • 57

    Mostly Cloudy

    • 47
    • 58

    Chance Rain Showers

Today 29 Jun West Prince William Sound & Whittier

Mostly cloudy with a slight chance of rain. Highs in the lower 50s. Light Winds becoming variable 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 29 Jun West Prince William Sound & Whittier

Mostly cloudy with a slight chance of rain. Lows in the upper 40s. Light Winds. Gusts to 25 Mph.

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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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