Port Jefferson Weather Forecast

    • 37
    • 48

    Decreasing Clouds

    • 43
    • 51

    Mostly Sunny

    • 43
    • 52

    Mostly Sunny

    • 45
    • 56

    Mostly Sunny

    • 46
    • 59

    Mostly Sunny

    • 48
    • 60

    Partly Sunny

    • 48
    • 61

    Mostly Sunny

Today 14 Nov Northwest Suffolk

Sunny. Highs around 60.

Tonight 14 Nov Northwest Suffolk

Mostly cloudy this Evening, then becoming partly cloudy. Isolated rain Showers this evening. Lows in the mid 30s. Northwest Winds 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Jefferson Temperature Statistics

November Temperature

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Lowest 1 November, 2026

    36.6 °F

  • Average November

    55.6 °F

  • Highest 5 November, 2026

    70.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (10.6 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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