Sullivan Island State Marine Park Weather Forecast

    • 57
    • 68

    Chance Rain

    • 57
    • 73

    Partly Sunny

    • 55
    • 70

    Mostly Sunny

    • 54
    • 67

    Partly Sunny

    • 54
    • 66

    Mostly Cloudy

    • 55
    • 68

    Partly Sunny

Today 22 Aug Haines Borough and Klukwan

Mostly cloudy. Slight chance of rain in the afternoon. Highs in the upper 60s. Light Winds.

Tonight 22 Aug Haines Borough and Klukwan

Mostly cloudy. Chance of rain. Lows in the mid 50s. Light Winds.

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Sullivan Island State Marine Park Temperature Statistics

August Temperature

Haines - Haines Airport (20.5 miles)

  • Lowest 14 August, 2025

    47.6 °F

  • Average August

    58.9 °F

  • Highest 12 August, 2025

    74.6 °F

Climate (2020–Present)

Haines - Haines Airport (20.5 miles)

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  • Average Low 2020–2025

    38.1 °F

  • Average 2020–2025

    43.4 °F

  • Average High 2020–2025

    48.7 °F
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