Port Jefferson Weather Forecast

    • 67
    • 78

    Chance Rain Showers

    • 71
    • 81

    Partly Sunny

    • 73
    • 84

    Partly Sunny

    • 70
    • 81

    Partly Sunny

    • 71
    • 80

    Slight Chance Rain Showers

    • 71
    • 80

    Chance Rain Showers

    • 71
    • 79

    Chance Rain Showers

Today 17 Aug Northwest Suffolk

Mostly cloudy with a 30 percent chance of Showers. Near steady temperature in the mid 70s. North Winds 5 to 10 Mph.

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Port Jefferson Temperature Statistics

August Temperature

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Lowest 14 August, 2022

    59 °F
  • Average August

    77.5 °F
  • Highest 9 August, 2022

    93.9 °F

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (10.6 miles)

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  • Average Low 2010–Present

    47.2 °F
  • Average 2010–Present

    54.7 °F
  • Average High 2010–Present

    62.1 °F
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