Great South Bay Weather Forecast

    • 41
    • 47

    Rain Likely

    • 45
    • 48

    Mostly Cloudy

    • 45
    • 54

    Chance Rain

    • 41
    • 50

    Slight Chance Rain

    • 44
    • 50

    Partly Sunny

    • 46
    • 52

    Partly Sunny

Today 19 Nov Southwest Suffolk

Cloudy with rain likely this Morning, then partly sunny this afternoon. Highs in the upper 40s. Northeast Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 19 Nov Southwest Suffolk

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 30s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great South Bay Temperature Statistics

November Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 7 November, 2025

    33.1 °F

  • Average November

    50.1 °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

    63.2 °F
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