Granite Bay State Marine Park Weather Forecast

    • 48
    • 54

    Rain

    • 48
    • 55

    Rain

    • 49
    • 57

    Rain Likely

    • 51
    • 63

    Partly Sunny

    • 52
    • 64

    Partly Sunny

    • 51
    • 63

    Slight Chance Rain Showers

Today 21 Jul West Prince William Sound & Whittier

A chance of rain in the Morning, then rain in the afternoon. Highs in the lower 50s. Southeast wind 10 to 15 Mph. Gusts to 25 Mph in the afternoon.

Tonight 21 Jul West Prince William Sound & Whittier

Rain. Rain may be heavy at Times. Lows in the upper 40s. East wind 10 to 20 Mph with Gusts to 30 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

    52.1 °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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