Granite Bay State Marine Park Weather Forecast

    • 46
    • 59

    Chance Rain Showers

    • 46
    • 57

    Rain Showers

    • 46
    • 60

    Slight Chance Rain

    • 49
    • 64

    Mostly Cloudy

    • 49
    • 63

    Mostly Cloudy

    • 48
    • 61

    Mostly Cloudy

Today 16 Jun West Prince William Sound & Whittier

Partly sunny. Highs in the 50s. Southwest wind 15 Mph.

Tonight 16 Jun West Prince William Sound & Whittier

Mostly cloudy. Lows in the mid 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 2 June, 2026

    37 °F

  • Average June

    51.8 °F

  • Highest 4 June, 2026

    75.9 °F

Climate (2021–Present)

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

    43.6 °F
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