Weather in Port Jefferson, New York, United States

7-Day Detailed Weather Forecast for Port Jefferson

Tonight

Temperature: 29°F

Wind Speed: 10 to 14 mph

Wind Direction: SW

Forecast: A chance of snow after 1am. Cloudy, with a low around 29. Wind chill values as low as 20. Southwest wind 10 to 14 mph. Chance of precipitation is 50%. New snow accumulation of less than half an inch possible.

Tuesday

Temperature: 40°F

Wind Speed: 9 to 13 mph

Wind Direction: SW

Forecast: Snow before 10am, then rain and snow between 10am and 11am, then rain and snow between 11am and 4pm. Cloudy, with a high near 40. Wind chill values as low as 20. Southwest wind 9 to 13 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

Tuesday Night

Temperature: 36°F

Wind Speed: 12 to 22 mph

Wind Direction: W

Forecast: Mostly cloudy. Low around 36, with temperatures rising to around 40 overnight. West wind 12 to 22 mph. New rainfall amounts less than a tenth of an inch possible.

Wednesday

Temperature: 42°F

Wind Speed: 13 to 22 mph

Wind Direction: NW

Forecast: Mostly sunny. High near 42, with temperatures falling to around 40 in the afternoon. Northwest wind 13 to 22 mph.

Wednesday Night

Temperature: 27°F

Wind Speed: 6 to 12 mph

Wind Direction: NW

Forecast: Partly cloudy. Low around 27, with temperatures rising to around 30 overnight. Northwest wind 6 to 12 mph.

Christmas Day

Temperature: 42°F

Wind Speed: 10 to 16 mph

Wind Direction: W

Forecast: Mostly cloudy. High near 42, with temperatures falling to around 40 in the afternoon.

Thursday Night

Temperature: 29°F

Wind Speed: 13 to 17 mph

Wind Direction: N

Forecast: Mostly cloudy, with a low around 29.

Friday

Temperature: 35°F

Wind Speed: 14 mph

Wind Direction: NE

Forecast: A slight chance of snow between 7am and 1pm, then rain and snow likely. Cloudy, with a high near 35. Chance of precipitation is 60%.

Friday Night

Temperature: 31°F

Wind Speed: 13 to 18 mph

Wind Direction: E

Forecast: Rain and snow. Cloudy, with a low around 31. Chance of precipitation is 80%.

Saturday

Temperature: 36°F

Wind Speed: 13 to 17 mph

Wind Direction: NE

Forecast: Rain and snow likely. Cloudy, with a high near 36. Chance of precipitation is 60%.

Saturday Night

Temperature: 34°F

Wind Speed: 12 mph

Wind Direction: E

Forecast: A chance of rain and snow. Cloudy, with a low around 34. Chance of precipitation is 30%.

Sunday

Temperature: 44°F

Wind Speed: 10 to 17 mph

Wind Direction: S

Forecast: Rain and snow likely. Cloudy, with a high near 44. Chance of precipitation is 70%.

Sunday Night

Temperature: 29°F

Wind Speed: 18 to 25 mph

Wind Direction: W

Forecast: Rain likely before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 70%.

Monday

Temperature: 34°F

Wind Speed: 25 mph

Wind Direction: W

Forecast: A chance of rain and snow before 1pm. Mostly sunny, with a high near 34.