Great South Bay Weather Forecast

    • 38
    • 60

    Mostly Sunny

    • 40
    • 60

    Mostly Sunny

    • 51
    • 60

    Mostly Sunny

    • 54
    • 63

    Mostly Sunny

    • 49
    • 59

    Partly Sunny

    • 52
    • 57

    Partly Sunny

Today 23 Oct Southwest Suffolk

Sunny. Highs in the upper 50s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Oct Southwest Suffolk

Mostly clear. Patchy frost after midnight. Lows in the upper 30s. Northeast Winds 5 to 10 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 19 October, 2026

    39 °F

  • Average October

    60.2 °F

  • Highest 14 October, 2026

    82.7 °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

    47.2 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads