Great South Bay Weather Forecast

    • 41
    • 55

    Rain Showers

    • 43
    • 56

    Mostly Sunny

    • 52
    • 62

    Breezy

    • 52
    • 63

    Windy

    • 50
    • 59

    Windy

    • 53
    • 61

    Chance Rain Showers

    • 52
    • 61

    Partly Sunny

Today 17 Oct Southwest Suffolk

Mostly sunny and windy. Highs around 60.

Tonight 17 Oct Southwest Suffolk

Partly cloudy in the Evening, then becoming clear. Lows in the upper 30s. North Winds 15 to 20 Mph with Gusts up to 35 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 7 October, 2026

    39.7 °F

  • Average October

    61.8 °F

  • Highest 2 October, 2026

    79.6 °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

    47.2 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads