South Setauket Weather Forecast

    • 55
    • 75

    Mostly Cloudy

    • 56
    • 67

    Rain Likely

    • 57
    • 68

    Chance Rain

    • 58
    • 70

    Chance Rain Showers

    • 54
    • 72

    Chance Rain Showers

    • 55
    • 71

    Slight Chance Rain Showers

    • 56
    • 73

    Partly Sunny

Today 27 May Northwest Suffolk

Partly sunny. Highs in the mid 70s. South Winds 5 to 10 Mph.

Tonight 27 May Northwest Suffolk

Cloudy. Lows in the mid 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Setauket Temperature Statistics

May Temperature

Islip, Long Island Mac Arthur Airport (6.2 miles)

  • Lowest 23 May, 2025

    46.7 °F

  • Average May

    61.6 °F

  • Highest 11 May, 2025

    78.7 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (6.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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