Great South Bay Weather Forecast

    • 69
    • 76

    Increasing Clouds

    • 72
    • 79

    Mostly Cloudy

    • 72
    • 82

    Chance Rain Showers

    • 70
    • 79

    Partly Sunny

    • 71
    • 79

    Partly Sunny

    • 73
    • 79

    Partly Sunny

Today 8 Jul Southwest Suffolk

Mostly sunny. Highs in the upper 70s. North Winds 5 to 10 Mph, becoming west in the afternoon.

Tonight 8 Jul Southwest Suffolk

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 5 July, 2026

    69.1 °F

  • Average July

    81.7 °F

  • Highest 3 July, 2026

    98.7 °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