Decision Point State Marine Park Weather Forecast

    • 49
    • 63

    Partly Sunny

    • 51
    • 60

    Chance Rain

    • 50
    • 57

    Rain Likely

    • 51
    • 60

    Rain Likely

    • 50
    • 59

    Chance Rain

    • 49
    • 60

    Chance Rain

Today 17 Aug West Prince William Sound & Whittier

Mostly sunny. Highs in the lower 60s. Northwest wind 15 Mph with Gusts to 25 Mph.

Tonight 17 Aug West Prince William Sound & Whittier

Partly cloudy. Lows around 50. Light Winds becoming variable 10 Mph after midnight.

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Decision Point State Marine Park Temperature Statistics

August Temperature

Portage, Portage Glacier (12.4 miles)

  • Lowest 4 August, 2025

    39.7 °F

  • Average August

    53.7 °F

  • Highest 4 August, 2025

    68.6 °F

Climate (2020–Present)

Portage, Portage Glacier (12.4 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    39.1 °F

  • Average High 2020–2025

    44.7 °F
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