Port Jefferson Weather Forecast

    • 43
    • 58

    Sunny

    • 53
    • 69

    Sunny

    • 54
    • 71

    Sunny

    • 52
    • 70

    Sunny

    • 56
    • 71

    Mostly Sunny

    • 59
    • 71

    Partly Sunny

    • 59
    • 71

    Mostly Cloudy

Today 17 Oct Northwest Suffolk

Sunny. Highs in the upper 50s. North Winds around 10 Mph with Gusts up to 20 Mph, becoming northwest this afternoon.

Tonight 17 Oct Northwest Suffolk

Clear. Lows in the lower 40s. Southwest Winds 5 to 10 Mph.

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Port Jefferson Temperature Statistics

October Temperature

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Lowest 2 October, 2017

    46.9 °F

  • Average October

    65 °F

  • Highest 6 October, 2017

    80.1 °F

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (10.6 miles)

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  • Average Low 2010–Present

    45.9 °F

  • Average 2010–Present

    54.2 °F

  • Average High 2010–Present

    61.7 °F
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