Harbor Island Weather Forecast

    • 54
    • 57

    Increasing Clouds

    • 55
    • 57

    Partly Sunny

    • 53
    • 57

    Mostly Cloudy

    • 52
    • 56

    Cloudy

    • 52
    • 54

    Rain Showers

    • 51
    • 55

    Mostly Cloudy

Today 11 Sep Southern Kenai Mtns

Sunny. Highs in the mid 60s. Light Winds.

Tonight 11 Sep Southern Kenai Mtns

Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

September Temperature

Seward (31.7 miles)

  • Lowest 4 September, 2026

    39 °F

  • Average September

    53.8 °F

  • Highest 1 September, 2026

    66 °F

Climate (2021–2026)

Seward (31.7 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    40.2 °F

  • Average High 2021–2026

    45.6 °F
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