Great South Bay Weather Forecast

    • 55
    • 60

    Partly Sunny

    • 59
    • 64

    Mostly Sunny

    • 51
    • 67

    Mostly Sunny

    • 51
    • 59

    Mostly Cloudy

    • 55
    • 62

    Mostly Cloudy

    • 55
    • 63

    Mostly Cloudy

Today 28 Oct Southwest Suffolk

Partly cloudy. Highs in the lower 60s. Northeast Winds 5 to 10 Mph, becoming southeast this afternoon.

Tonight 28 Oct Southwest Suffolk

Mostly cloudy in the Evening, then clearing. Lows in the upper 40s. South Winds around 5 Mph.

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Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 24 October, 2026

    37.9 °F

  • Average October

    58.7 °F

  • Highest 14 October, 2026

    82.7 °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

    55.1 °F

  • Average High 2021–2026

    63 °F
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