Barnum Island Weather Forecast

    • 75
    • 87

    Chance Thunderstorms

    • 72
    • 88

    Partly Sunny

    • 72
    • 84

    Chance Thunderstorms

    • 72
    • 86

    Slight Chance Thunderstorms

    • 67
    • 82

    Mostly Sunny

    • 69
    • 79

    Partly Sunny

Today 10 Aug Southern Nassau

Mostly sunny. Highs around 90. East Winds 5 to 10 Mph, becoming south with Gusts up to 20 Mph this afternoon. Heat index Values in the upper 90s.

Tonight 10 Aug Southern Nassau

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Humid with Lows in the mid 70s. West Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 50 percent.

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Barnum Island Temperature Statistics

August Temperature

New York, Kennedy International Airport (6.2 miles)

  • Lowest 4 August, 2026

    66.7 °F

  • Average August

    78.5 °F

  • Highest 7 August, 2026

    90 °F

Climate (2021–2026)

New York, Kennedy International Airport (6.2 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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