Alder Island Weather Forecast

    • 73
    • 82

    Partly Sunny

    • 67
    • 79

    Rain Showers Likely

    • 69
    • 79

    Rain Showers Likely

    • 69
    • 77

    Rain Showers Likely

    • 69
    • 79

    Chance Rain Showers

    • 68
    • 80

    Mostly Sunny

Today 19 Aug Southern Nassau

Mostly sunny. Highs in the mid 80s. Northwest Winds around 5 Mph, becoming southwest this afternoon.

Tonight 19 Aug Southern Nassau

Partly cloudy. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph, becoming west after midnight.

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Alder Island Temperature Statistics

August Temperature

New York, Kennedy International Airport (9.9 miles)

  • Lowest 4 August, 2026

    66.7 °F

  • Average August

    78.7 °F

  • Highest 9 August, 2026

    92.6 °F

Climate (2021–2026)

New York, Kennedy International Airport (9.9 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    63.6 °F
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