Alder Island Weather Forecast

    • 74
    • 79

    Breezy

    • 69
    • 82

    Chance Rain Showers

    • 67
    • 77

    Mostly Sunny

    • 70
    • 75

    Chance Rain Showers

    • 70
    • 77

    Slight Chance Rain Showers

    • 69
    • 78

    Partly Sunny

Today 9 Sep Southern Nassau

Partly cloudy. Highs in the lower 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to south 15 to 20 Mph with Gusts up to 35 Mph this afternoon.

Tonight 9 Sep Southern Nassau

Partly cloudy. A slight chance of Showers after midnight. Breezy with Lows in the lower 70s. Southwest Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alder Island Temperature Statistics

September Temperature

New York, Kennedy International Airport (9.9 miles)

  • Lowest 7 September, 2026

    61 °F

  • Average September

    74.4 °F

  • Highest 3 September, 2026

    86.6 °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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