Granite Bay State Marine Park Weather Forecast

    • 50
    • 63

    Increasing Clouds

    • 49
    • 58

    Rain

    • 49
    • 56

    Rain

    • 48
    • 56

    Rain Showers

    • 48
    • 56

    Rain Showers

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    • 55

    Rain Showers

Today 10 Jul West Prince William Sound & Whittier

Sunny. Highs in the upper 50s to mid 60s. West wind 10 to 25 Mph.

Tonight 10 Jul West Prince William Sound & Whittier

Clear in the evening then becoming partly cloudy. Lows around 50. Southwest wind 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite Bay State Marine Park Temperature Statistics

July Temperature

Portage, Portage Glacier (25.5 miles)

  • Lowest 1 July, 2026

    34 °F

  • Average July

    51.9 °F

  • Highest 6 July, 2026

    68 °F

Climate (2021–2026)

Portage, Portage Glacier (25.5 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    43.7 °F
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