Granite Bay State Marine Park Weather Forecast

    • 48
    • 58

    Chance Rain Showers

    • 46
    • 52

    Chance Rain

    • 48
    • 58

    Partly Sunny

    • 48
    • 59

    Rain Showers Likely

    • 50
    • 59

    Rain Showers Likely

    • 51
    • 58

    Rain Showers Likely

Today 30 Aug West Prince William Sound & Whittier

Sunny in the morning then becoming partly cloudy. Highs in the mid 50s. North wind 10 to 25 Mph with Gusts to 40 Mph shifting to the southwest with Gusts to 30 Mph in the afternoon.

Tonight 30 Aug West Prince William Sound & Whittier

Mostly cloudy. Lows in the upper 40s. Light Winds becoming north 10 to 15 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

August Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 27 August, 2026

    37 °F

  • Average August

    55.3 °F

  • Highest 14 August, 2026

    73.9 °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