Weather in Port Jefferson, New York, United States

7-Day Detailed Weather Forecast for Port Jefferson

Overnight

Temperature: 32°F

Wind Speed: 5 to 8 mph

Wind Direction: SW

Forecast: Mostly cloudy. Low around 32, with temperatures rising to around 34 overnight. Southwest wind 5 to 8 mph.

Christmas Day

Temperature: 43°F

Wind Speed: 10 to 21 mph

Wind Direction: W

Forecast: Partly sunny. High near 43, with temperatures falling to around 41 in the afternoon. West wind 10 to 21 mph.

Thursday Night

Temperature: 22°F

Wind Speed: 18 to 24 mph

Wind Direction: NW

Forecast: Mostly clear, with a low around 22. Wind chill values as low as 9. Northwest wind 18 to 24 mph.

Friday

Temperature: 29°F

Wind Speed: 6 to 18 mph

Wind Direction: NE

Forecast: A chance of snow after 1pm. Partly sunny, with a high near 29. Wind chill values as low as 8. Northeast wind 6 to 18 mph. Chance of precipitation is 30%.

Friday Night

Temperature: 26°F

Wind Speed: 6 to 17 mph

Wind Direction: E

Forecast: Snow. Cloudy. Low around 26, with temperatures rising to around 30 overnight. East wind 6 to 17 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

Saturday

Temperature: 33°F

Wind Speed: 9 to 17 mph

Wind Direction: NE

Forecast: Snow. Mostly cloudy. High near 33, with temperatures falling to around 31 in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Saturday Night

Temperature: 27°F

Wind Speed: 7 to 10 mph

Wind Direction: N

Forecast: A slight chance of snow before 7pm. Mostly cloudy, with a low around 27. New snow accumulation of less than half an inch possible.

Sunday

Temperature: 38°F

Wind Speed: 8 mph

Wind Direction: W

Forecast: A chance of rain after 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

Sunday Night

Temperature: 35°F

Wind Speed: 8 to 14 mph

Wind Direction: SW

Forecast: Rain. Cloudy, with a low around 35. Chance of precipitation is 90%.

Monday

Temperature: 46°F

Wind Speed: 15 to 24 mph

Wind Direction: SW

Forecast: Rain. Cloudy, with a high near 46. Chance of precipitation is 90%.

Monday Night

Temperature: 28°F

Wind Speed: 25 to 31 mph

Wind Direction: W

Forecast: A chance of rain before 7pm. Partly cloudy, with a low around 28. Chance of precipitation is 50%.

Tuesday

Temperature: 32°F

Wind Speed: 24 to 29 mph

Wind Direction: W

Forecast: Mostly sunny, with a high near 32.

Tuesday Night

Temperature: 27°F

Wind Speed: 18 to 24 mph

Wind Direction: W

Forecast: Partly cloudy, with a low around 27.

Wednesday

Temperature: 35°F

Wind Speed: 18 mph

Wind Direction: W

Forecast: Mostly sunny, with a high near 35.