South Esther Island State Marine Park Weather Forecast

    • 40
    • 51

    Increasing Clouds

    • 38
    • 53

    Mostly Sunny

    • 39
    • 52

    Partly Sunny

    • 38
    • 44

    Rain

    • 39
    • 47

    Rain

    • 39
    • 46

    Rain Likely

Today 9 May West Prince William Sound & Whittier

Mostly sunny. Highs in the lower 50s. Variable wind 10 Mph in the morning becoming light.

Tonight 9 May West Prince William Sound & Whittier

Partly cloudy in the evening then becoming mostly cloudy. Isolated rain Showers. Lows in the mid 30s to lower 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Esther Island State Marine Park Temperature Statistics

May Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 7 May, 2025

    30 °F

  • Average May

    40.4 °F

  • Highest 7 May, 2025

    48.9 °F

Climate (2020–Present)

Portage, Portage Glacier (25.5 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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