Great South Bay Weather Forecast

    • 38
    • 52

    Rain

    • 35
    • 42

    Rain

    • 36
    • 48

    Rain

    • 37
    • 42

    Partly Sunny

    • 28
    • 42

    Partly Sunny

    • 33
    • 39

    Mostly Cloudy

Today 30 Nov Southwest Suffolk

Cloudy. A chance of rain this Morning, then rain this afternoon. Highs in the lower 50s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

Tonight 30 Nov Southwest Suffolk

Mostly cloudy with a chance of rain in the Evening, then mostly clear after midnight. Lows in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

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Great South Bay Temperature Statistics

November Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 23 November, 2025

    30 °F

  • Average November

    48 °F

  • Highest 8 November, 2025

    66.9 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    63.1 °F
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