Bay of Isles - South Arm Weather Forecast

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    Chance Rain

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    Rain Showers

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    Rain Showers

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    Rain Showers

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    Rain Showers

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    Rain Showers

Today 23 Sep West Prince William Sound & Whittier

Sunny. Highs in the lower 50s. North wind 10 to 20 Mph. Gusts to 30 Mph.

Tonight 23 Sep West Prince William Sound & Whittier

Mostly clear. Lows in the mid 40s to lower 50s. Variable wind 10 Mph with Gusts to 20 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bay of Isles - South Arm Temperature Statistics

September Temperature

Portage, Portage Glacier (47.8 miles)

  • Lowest 2 September, 2026

    30.9 °F

  • Average September

    51 °F

  • Highest 11 September, 2026

    68 °F

Climate (2021–2026)

Portage, Portage Glacier (47.8 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    38.2 °F

  • Average High 2021–2026

    43.8 °F
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