Port Jefferson Harbor Entrance Weather Forecast
- 58
- 67
Mostly Sunny
- 59
- 65
Mostly Sunny
- 57
- 61
Mostly Cloudy
- 53
- 61
Chance Rain
- 53
- 61
Mostly Cloudy
- 56
- 62
Chance Rain
Today 29 Sep Northwest Suffolk
Mostly sunny. Highs in the upper 60s. North Winds 10 to 15 Mph.
Port Jefferson Harbor Entrance Temperature Statistics
September Temperature
Islip, Long Island Mac Arthur Airport (11.8 miles)
Lowest 24 September, 2022
48 °FAverage September
69.2 °FHighest 1 September, 2022
87.1 °F
Climate (2010–Present)
Islip, Long Island Mac Arthur Airport (11.8 miles)
Average Low 2010–Present
47.8 °FAverage 2010–Present
55.2 °FAverage High 2010–Present
62.6 °F