Port Jefferson Weather Forecast

    • 64
    • 82

    Mostly Sunny

    • 64
    • 81

    Partly Sunny

    • 65
    • 75

    Rain Showers

    • 65
    • 78

    Mostly Sunny

    • 66
    • 76

    Mostly Sunny

    • 66
    • 77

    Chance Rain Showers

Today 20 Jun Northwest Suffolk

Sunny. Near steady temperature in the lower 80s. Northwest Winds around 15 Mph with Gusts up to 30 Mph.

Tonight 20 Jun Northwest Suffolk

Mostly clear. Lows in the mid 60s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming west around 5 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Jefferson Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Lowest 2 June, 2026

    46.7 °F

  • Average June

    70.8 °F

  • Highest 12 June, 2026

    94.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
Get WillyWeather+ to remove ads