Sister Island Weather Forecast

    • 66
    • 83

    Increasing Clouds

    • 55
    • 82

    Mostly Cloudy

    • 55
    • 74

    Sunny

    • 59
    • 72

    Partly Sunny

    • 59
    • 76

    Mostly Sunny

    • 62
    • 80

    Mostly Sunny

    • 64
    • 80

    Mostly Sunny

Today 18 Apr Coastal Chatham

Mostly sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.

Tonight 18 Apr Coastal Chatham

Mostly cloudy. Lows in the upper 60s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sister Island Temperature Statistics

April Temperature

Hunter U. S. Army Airfield (10.6 miles)

  • Lowest 9 April, 2026

    51.3 °F

  • Average April

    68.8 °F

  • Highest 16 April, 2026

    89.2 °F

Climate (2021–Present)

Hunter U. S. Army Airfield (10.6 miles)

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  • Average Low 2021–2026

    59.3 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    78 °F
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