Granite Bay State Marine Park Weather Forecast

    • 53
    • 59

    Rain

    • 52
    • 57

    Chance Rain

    • 52
    • 55

    Rain

    • 50
    • 55

    Rain

    • 48
    • 55

    Rain Showers Likely

    • 48
    • 57

    Rain Showers Likely

    • 49
    • 59

    Chance Rain Showers

Today 4 Sep West Prince William Sound & Whittier

Partly cloudy. A chance of rain in the afternoon. Patchy fog in the afternoon. Highs in the upper 50s. Light Winds.

Tonight 4 Sep West Prince William Sound & Whittier

A chance of rain in the Evening, then rain after midnight. Patchy fog. Lows in the lower 50s. Variable wind 10 Mph shifting to the variable 10 Mph with Gusts to 20 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

    49.2 °F

  • Highest 2 September, 2026

    64.9 °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

    38.1 °F

  • Average High 2021–2026

    43.7 °F
Get WillyWeather+ to remove ads