Great South Bay Weather Forecast

    • 69
    • 78

    Chance Rain Showers

    • 67
    • 77

    Chance Rain Showers

    • 64
    • 78

    Mostly Sunny

    • 66
    • 77

    Partly Sunny

    • 65
    • 76

    Chance Rain Showers

Today 18 Jun Southwest Suffolk

Mostly cloudy with a chance of Showers this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Breezy with Highs in the lower 80s. South Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of rain 50 percent.

Tonight 18 Jun Southwest Suffolk

Partly cloudy with a slight chance of Showers in the Evening, then mostly cloudy after midnight. Lows in the upper 60s. West Winds 15 to 20 Mph. Gusts up to 35 Mph, decreasing to 25 Mph after midnight. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 2 June, 2026

    46.7 °F

  • Average June

    71.2 °F

  • Highest 12 June, 2026

    94.6 °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

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads