Port Jefferson Harbor Entrance Weather Forecast

    • 69
    • 78

    Chance Rain Showers

    • 68
    • 83

    Chance Rain Showers

    • 66
    • 80

    Mostly Sunny

    • 69
    • 80

    Mostly Cloudy

    • 72
    • 82

    Partly Sunny

    • 73
    • 84

    Slight Chance Thunderstorms

Today 2 Jul Northwest Suffolk

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds and heavy rainfall. Humid with Highs in the lower 80s. Southwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 2 Jul Northwest Suffolk

Mostly cloudy with a 50 percent chance of Showers. Near steady temperature in the lower 70s. Southwest Winds around 5 Mph.

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Port Jefferson Harbor Entrance Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

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Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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