Granite Bay State Marine Park Weather Forecast

    • 46
    • 53

    Rain

    • 44
    • 52

    Rain

    • 45
    • 51

    Rain

    • 45
    • 52

    Rain Showers

    • 43
    • 50

    Rain Showers

    • 42
    • 51

    Chance Rain Showers

    • 43
    • 51

    Chance Rain Showers

Today 17 Sep West Prince William Sound & Whittier

Partly sunny with a slight chance of Showers. Highs in the lower 50s. Variable wind 10 Mph.

Tonight 17 Sep West Prince William Sound & Whittier

A chance of Showers in the Evening, then Showers after midnight. Lows in the mid 40s. East wind 15 Mph. Gusts to 25 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

September Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 2 September, 2026

    30.9 °F

  • Average September

    52.7 °F

  • Highest 11 September, 2026

    68 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.2 °F

  • Average High 2021–2026

    43.8 °F
Get WillyWeather+ to remove ads