Granite Bay State Marine Park Weather Forecast

    • 39
    • 47

    Mostly Cloudy

    • 37
    • 50

    Rain

    • 37
    • 44

    Rain

    • 37
    • 43

    Rain

    • 38
    • 47

    Slight Chance Rain Showers

    • 39
    • 48

    Chance Rain Showers

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    • 47

    Rain Showers Likely

Today 24 May West Prince William Sound & Whittier

Partly cloudy. Highs in the upper 40s. North wind 10 to 15 Mph shifting to the west with Gusts to 30 Mph in the afternoon.

Tonight 24 May West Prince William Sound & Whittier

Mostly clear. Lows around 40. West wind 10 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

May Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 9 May, 2026

    32 °F

  • Average May

    40.8 °F

  • Highest 14 May, 2026

    52 °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

    43.7 °F
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