Great South Bay Weather Forecast

    • 54
    • 69

    Partly Sunny

    • 53
    • 67

    Mostly Sunny

    • 61
    • 64

    Partly Sunny

    • 63
    • 66

    Rain Showers Likely

    • 61
    • 67

    Chance Rain Showers

    • 54
    • 67

    Mostly Cloudy

Today 8 Oct Southwest Suffolk

Sunny. Highs in the lower 70s. West Winds 15 to 20 Mph.

Tonight 8 Oct Southwest Suffolk

Mostly clear. Lows in the lower 50s. Northwest Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Great South Bay Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Lowest 6 October, 2026

    46 °F

  • Average October

    63.1 °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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