Granite Bay State Marine Park Weather Forecast
- 48
- 58
Mostly Sunny
- 47
- 59
Partly Sunny
- 50
- 60
Partly Sunny
- 50
- 56
Rain Showers Likely
- 51
- 56
Rain Showers Likely
- 50
- 54
Rain Showers Likely
- 50
- 54
Rain Showers Likely
Today 1 Sep West Prince William Sound & Whittier
Sunny. Highs in the upper 50s. Northwest wind 10 to 20 Mph with Gusts to 30 Mph.
Tonight 1 Sep West Prince William Sound & Whittier
Clear. Lows in the mid 40s to lower 50s. Northwest wind 15 to 30 Mph with Gusts to 40 Mph.
Granite Bay State Marine Park Temperature Statistics
September Temperature
Portage, Portage Glacier (25.5 miles)
Lowest
–Average September
–Highest
–
Climate (2021–2026)
Portage, Portage Glacier (25.5 miles)
Average Low 2021–2026
32.2 °FAverage 2021–2026
38.1 °FAverage High 2021–2026
43.7 °F