Great South Bay Weather Forecast

    • 49
    • 53

    Rain Showers

    • 33
    • 55

    Windy

    • 39
    • 45

    Breezy

    • 42
    • 47

    Mostly Cloudy

    • 41
    • 48

    Partly Sunny

    • 45
    • 49

    Chance Rain

    • 52
    • 56

    Chance Rain

Today 15 Nov Southwest Suffolk

Partly sunny with a 20 percent chance of Showers. Highs in the mid 50s. Southwest Winds 5 to 10 Mph.

Tonight 15 Nov Southwest Suffolk

Showers with isolated Thunderstorms, mainly this evening. Lows in the mid 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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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

    50.7 °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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