Great South Bay Weather Forecast

    • 37
    • 49

    Rain

    • 42
    • 47

    Breezy

    • 42
    • 49

    Partly Sunny

    • 42
    • 50

    Mostly Sunny

    • 45
    • 54

    Partly Sunny

Today 13 Nov Southwest Suffolk

Mostly sunny. Highs around 60.

Tonight 13 Nov Southwest Suffolk

Cloudy. Lows in the upper 30s. North Winds 10 to 15 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 1 November, 2026

    36.6 °F

  • Average November

    56 °F

  • Highest 5 November, 2026

    70.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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