Granite Bay State Marine Park Weather Forecast

    • 36
    • 40

    Rain

    • 33
    • 37

    Rain

    • 34
    • 39

    Rain

    • 36
    • 39

    Rain Likely

    • 35
    • 39

    Rain

    • 36
    • 41

    Rain

Today 29 Jan West Prince William Sound & Whittier

Rain. Highs around 40. East wind 30 to 45 Mph with Gusts to 55 Mph.

Tonight 29 Jan West Prince William Sound & Whittier

Rain. Lows in the upper 30s. East wind 15 to 30 Mph. Gusts to 50 Mph decreasing to 35 Mph after midnight.

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Granite Bay State Marine Park Temperature Statistics

January Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 8 January, 2026

    -4 °F

  • Average January

    20 °F

  • Highest 18 January, 2026

    45 °F

Climate (2021–Present)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.7 °F

  • Average 2021–2026

    38.6 °F

  • Average High 2021–2026

    44.1 °F
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