Granite Bay State Marine Park Weather Forecast

    • 40
    • 43

    Rain Showers

    • 38
    • 47

    Chance Rain

    • 36
    • 45

    Rain

    • 37
    • 41

    Rain

    • 37
    • 43

    Rain

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    • 41

    Rain Likely

Today 16 Oct West Prince William Sound & Whittier

Scattered rain Showers in the Morning, then numerous rain Showers in the afternoon. Highs in the mid 40s. East wind 10 to 15 Mph with Gusts to 25 Mph.

Tonight 16 Oct West Prince William Sound & Whittier

Numerous rain Showers in the Evening, then a chance of rain Showers after midnight. Lows in the upper 30s. Northeast wind 10 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

October Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 2 October, 2026

    30.9 °F

  • Average October

    41.4 °F

  • Highest 9 October, 2026

    48.9 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.3 °F

  • Average 2021–2026

    38.3 °F

  • Average High 2021–2026

    43.9 °F
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