Great South Bay Weather Forecast

    • 70
    • 78

    Rain Showers

    • 71
    • 77

    Mostly Cloudy

    • 74
    • 78

    Chance Rain Showers

    • 75
    • 82

    Slight Chance Thunderstorms

    • 75
    • 82

    Chance Rain Showers

    • 75
    • 82

    Chance Rain Showers

    • 74
    • 81

    Partly Sunny

Today 3 Aug Southwest Suffolk

Showers with a chance of Thunderstorms. Breezy with Highs around 80. Southwest Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.

Tonight 3 Aug Southwest Suffolk

Mostly cloudy with a chance of Showers this Evening, then partly cloudy after midnight. Patchy fog after midnight. Lows in the mid 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming north 5 to 10 Mph after midnight. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 1 August, 2026

    73 °F

  • Average August

    76.9 °F

  • Highest 1 August, 2026

    82 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
Get WillyWeather+ to remove ads