Great South Bay Weather Forecast

    • 56
    • 61

    Chance Rain Showers

    • 51
    • 69

    Rain Showers

    • 45
    • 53

    Breezy

    • 51
    • 56

    Mostly Sunny

    • 54
    • 60

    Partly Sunny

    • 54
    • 62

    Partly Sunny

Today 15 Oct Southwest Suffolk

Sunny, cooler with Highs in the lower 60s. Northeast Winds 10 to 15 Mph.

Tonight 15 Oct Southwest Suffolk

Mostly cloudy. A slight chance of Showers after midnight. Lows in the lower 50s. Southeast Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Real-Time

Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 7 October, 2026

    39.7 °F

  • Average October

    61.3 °F

  • Highest 2 October, 2026

    79.6 °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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