Port Jefferson Harbor Weather Forecast

    • 52
    • 59

    Becoming Sunny

    • 54
    • 64

    Partly Sunny

    • 57
    • 65

    Partly Sunny

    • 58
    • 67

    Mostly Cloudy

    • 59
    • 68

    Rain Showers Likely

    • 56
    • 67

    Rain Showers Likely

Today 1 Nov Northwest Suffolk

Sunny. Highs in the upper 50s. North Winds around 5 Mph, becoming west this afternoon.

Tonight 1 Nov Northwest Suffolk

Mostly clear. Lows in the lower 40s. Southwest Winds around 5 Mph.

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Port Jefferson Harbor Temperature Statistics

November Temperature

Islip, Long Island Mac Arthur Airport (11.2 miles)

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  • Average November

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Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (11.2 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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