Alder Island Weather Forecast

    • 74
    • 85

    Mostly Sunny

    • 75
    • 84

    Slight Chance Thunderstorms

    • 72
    • 83

    Chance Thunderstorms

    • 72
    • 81

    Chance Rain Showers

    • 71
    • 81

    Chance Rain Showers

    • 68
    • 80

    Partly Sunny

Today 9 Aug Southern Nassau

Partly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 101.

Tonight 9 Aug Southern Nassau

Mostly clear. Humid with Lows in the lower 70s. West Winds 5 to 10 Mph, becoming northeast 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

    77.9 °F

  • Highest 6 August, 2026

    86 °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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