Great South Bay Weather Forecast

    • 33
    • 41

    Chance Snow

    • 31
    • 36

    Blizzard

    • 26
    • 32

    Blizzard

    • 23
    • 31

    Partly Sunny

    • 34
    • 39

    Chance Rain

    • 33
    • 41

    Chance Rain

Today 21 Feb Southwest Suffolk

Mostly sunny. Highs in the mid 40s. Northwest Winds 5 to 10 Mph.

Tonight 21 Feb Southwest Suffolk

Mostly cloudy. A slight chance of snow in the Evening, then a chance of snow after midnight. Lows in the lower 30s. Northeast Winds around 5 Mph, increasing to east 10 to 15 Mph after midnight. Chance of snow 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

February Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 8 February, 2026

    4.6 °F

  • Average February

    26.6 °F

  • Highest 14 February, 2026

    43.6 °F

Climate (2021–Present)

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 °F
Get WillyWeather+ to remove ads