Great South Bay Weather Forecast

    • 55
    • 63

    Chance Rain

    • 46
    • 65

    Breezy

    • 46
    • 59

    Breezy

    • 48
    • 61

    Mostly Sunny

    • 57
    • 65

    Partly Sunny

    • 56
    • 69

    Chance Rain Showers

Today 14 Oct Southwest Suffolk

Mostly cloudy. A chance of Rain, mainly in the morning. Breezy with Highs in the lower 60s. Northeast Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 50 percent.

Tonight 14 Oct Southwest Suffolk

Mostly cloudy with a chance of rain in the Evening, then partly cloudy with a slight chance of rain after midnight. Lows in the lower 50s. North Winds 15 to 20 Mph. Gusts up to 30 Mph in the evening. Chance of rain 40 percent.

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Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 10 October, 2025

    42.1 °F

  • Average October

    63.4 °F

  • Highest 4 October, 2025

    82 °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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