Port Jefferson Weather Forecast

    • 65
    • 83

    Chance Thunderstorms

    • 62
    • 80

    Mostly Sunny

    • 65
    • 83

    Sunny

    • 66
    • 82

    Mostly Sunny

    • 70
    • 83

    Partly Sunny

    • 72
    • 91

    Slight Chance Thunderstorms

Today 22 Aug Northwest Suffolk

Cloudy with a chance of Showers. A chance of Thunderstorms in the afternoon. Humid with Highs in the lower 80s. Southwest Winds 10 to 15 Mph, becoming west in the afternoon. Chance of rain 50 percent.

Tonight 22 Aug Northwest Suffolk

Showers with isolated Thunderstorms. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the lower 70s. Southeast Winds 5 to 10 Mph. Chance of rain near 100 percent.

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Port Jefferson Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Lowest 20 August, 2018

    64.9 °F
  • Average August

    77.1 °F
  • Highest 5 August, 2018

    90 °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

    53.9 °F
  • Average High 2010–Present

    61.4 °F
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