Alder Island Weather Forecast

    • 69
    • 78

    Rain Showers Likely

    • 70
    • 77

    Rain Showers Likely

    • 71
    • 79

    Chance Thunderstorms

    • 70
    • 78

    Chance Rain Showers

    • 69
    • 79

    Chance Rain Showers

    • 67
    • 77

    Chance Rain Showers

Today 30 Aug Southern Nassau

Partly sunny. A chance of Showers this afternoon. Highs in the lower 80s. Southwest Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 30 Aug Southern Nassau

Showers likely with a chance of Thunderstorms in the Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Humid with Lows in the upper 60s. Southwest Winds 10 to 15 Mph, becoming west around 5 Mph after midnight. Chance of rain 70 percent.

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Alder Island Temperature Statistics

August Temperature

New York, Kennedy International Airport (9.9 miles)

  • Lowest 21 August, 2026

    64.7 °F

  • Average August

    77.4 °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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