Great South Bay Weather Forecast

    • 74
    • 79

    Mostly Cloudy

    • 70
    • 78

    Rain Showers

    • 71
    • 78

    Partly Sunny

    • 74
    • 79

    Slight Chance Thunderstorms

    • 74
    • 80

    Chance Rain Showers

    • 75
    • 81

    Chance Rain Showers

    • 74
    • 81

    Chance Rain Showers

Today 2 Aug Southwest Suffolk

Mostly cloudy with a 20 percent chance of Showers. Highs in the lower 80s. Southeast Winds 10 to 15 Mph.

Tonight 2 Aug Southwest Suffolk

Cloudy. Scattered Showers with a slight chance of Thunderstorms this Evening, then Showers likely with a chance of Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Breezy with Lows in the lower 70s. South Winds 10 to 15 Mph, increasing to 20 to 25 Mph with Gusts up to 35 Mph after midnight. Chance of rain 70 percent.

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Great South Bay Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

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Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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