Great South Bay Weather Forecast

    • 49
    • 57

    Mostly Sunny

    • 55
    • 60

    Partly Sunny

    • 58
    • 64

    Mostly Sunny

    • 54
    • 67

    Mostly Sunny

    • 56
    • 63

    Mostly Cloudy

Today 27 Oct Southwest Suffolk

Sunny. Highs in the upper 50s. North Winds 10 to 15 Mph.

Tonight 27 Oct Southwest Suffolk

Mostly clear. Lows in the lower 40s. Northeast 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

    59.1 °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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