Port Jefferson Weather Forecast
- 42
- 57
Mostly Sunny
- 47
- 57
Slight Chance Rain
- 53
- 65
Mostly Cloudy
- 52
- 70
Mostly Cloudy
- 52
- 66
Chance Rain Showers
- 54
- 67
Partly Sunny
- 53
- 66
Partly Sunny
Today 26 Apr Northwest Suffolk
Sunny. Highs in the upper 50s. Southeast Winds 5 to 10 Mph.
Tonight 26 Apr Northwest Suffolk
Clear. Lows around 40. South Winds 5 to 10 Mph.
Port Jefferson Temperature Statistics
April Temperature
Islip, Long Island Mac Arthur Airport (10.6 miles)
Lowest 5 April, 2024
35.7 °FAverage April
50.5 °FHighest 15 April, 2024
78.7 °F
Climate (2019–Present)
Islip, Long Island Mac Arthur Airport (10.6 miles)
Take a look at our website widgetsAvailable free! Find Out MoreAverage Low 2019–2024
47.3 °FAverage 2019–2024
54.9 °FAverage High 2019–2024
62.5 °F