Great South Bay Weather Forecast

    • 43
    • 63

    Sunny

    • 61
    • 65

    Sunny

    • 59
    • 69

    Mostly Sunny

    • 56
    • 66

    Mostly Sunny

    • 59
    • 65

    Partly Sunny

    • 61
    • 65

    Chance Rain Showers

Today 6 Oct Southwest Suffolk

Sunny. Highs in the lower 60s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 6 Oct Southwest Suffolk

Mostly clear. Lows in the lower 40s. Northwest Winds 5 to 10 Mph.

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Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 4 October, 2026

    55 °F

  • Average October

    65.7 °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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