Setauket Harbor Weather Forecast

    • 60
    • 68

    Chance Rain Showers

    • 59
    • 73

    Rain

    • 55
    • 71

    Rain

    • 55
    • 68

    Partly Sunny

    • 57
    • 72

    Mostly Sunny

    • 59
    • 75

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

Today 29 May Northwest Suffolk

Mostly cloudy. Areas of drizzle early. Patchy fog early. Highs in the upper 60s. North Winds 5 to 10 Mph.

Tonight 29 May Northwest Suffolk

Mostly cloudy. Patchy fog after midnight. Lows around 60. Southwest Winds around 5 Mph.

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Setauket Harbor Temperature Statistics

May Temperature

Islip, Long Island Mac Arthur Airport (10.6 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 (10.6 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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