Port Jefferson Harbor Entrance Weather Forecast

    • 68
    • 79

    Mostly Sunny

    • 69
    • 82

    Partly Sunny

    • 71
    • 82

    Partly Sunny

    • 70
    • 84

    Chance Thunderstorms

    • 69
    • 80

    Chance Rain Showers

    • 72
    • 79

    Chance Rain Showers

Today 18 Jun Northwest Suffolk

Mostly sunny. Highs in the mid 80s. Southwest Winds 10 to 15 Mph.

Tonight 18 Jun Northwest Suffolk

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. Southwest Winds 10 to 15 Mph.

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  • Temperature Real-Time

Port Jefferson Harbor Entrance Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 1 June, 2024

    56.6 °F
  • Average June

    70.2 °F
  • Highest 3 June, 2024

    84.7 °F

Climate (2019–Present)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2019–2024

    47.3 °F
  • Average 2019–2024

    54.9 °F
  • Average High 2019–2024

    62.6 °F
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