Great South Bay Weather Forecast

    • 72
    • 79

    Rain Showers

    • 73
    • 81

    Slight Chance Rain Showers

    • 73
    • 81

    Mostly Sunny

    • 73
    • 81

    Partly Sunny

    • 70
    • 80

    Chance Rain Showers

    • 69
    • 77

    Slight Chance Rain Showers

Today 16 Aug Southwest Suffolk

Sunny in the Morning, then becoming partly sunny. Highs around 80. East Winds 5 to 10 Mph, becoming south 10 to 15 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 16 Aug Southwest Suffolk

A chance of Showers in the Evening, then Showers after midnight. Breezy with Lows in the upper 60s. South Winds 15 to 25 Mph. Chance of rain 90 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 4 August, 2026

    63.6 °F

  • Average August

    78.4 °F

  • Highest 7 August, 2026

    91.7 °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