Great South Bay Weather Forecast

    • 47
    • 71

    Becoming Sunny

    • 44
    • 64

    Sunny

    • 60
    • 64

    Mostly Sunny

    • 59
    • 68

    Mostly Sunny

    • 59
    • 66

    Mostly Sunny

    • 56
    • 64

    Partly Sunny

Today 5 Oct Southwest Suffolk

Mostly sunny. Highs in the lower 70s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 5 Oct Southwest Suffolk

Mostly clear. Lows in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

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Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 1 October, 2026

    60.1 °F

  • Average October

    69 °F

  • Highest 2 October, 2026

    78.1 °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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