Great South Bay Weather Forecast

    • 46
    • 55

    Partly Sunny

    • 52
    • 59

    Partly Sunny

    • 55
    • 62

    Mostly Cloudy

    • 57
    • 63

    Mostly Cloudy

    • 59
    • 65

    Mostly Cloudy

Today 31 Oct Southwest Suffolk

Sunny. Highs in the upper 50s. North Winds 10 to 15 Mph. Gusts up to 25 Mph early.

Tonight 31 Oct Southwest Suffolk

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 30s. North 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 25 October, 2026

    36.6 °F

  • Average October

    58.2 °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

    47.1 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
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