Weather in Port Jefferson, New York, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Port Jefferson
Tonight |
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Temperature: 37°F Wind Speed: 18 mph Wind Direction: SW Forecast: Mostly cloudy. Low around 37, with temperatures rising to around 41 overnight. Southwest wind around 18 mph. |
Sunday |
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Temperature: 44°F Wind Speed: 18 to 22 mph Wind Direction: W Forecast: Partly sunny. High near 44, with temperatures falling to around 37 in the afternoon. West wind 18 to 22 mph. |
Sunday Night |
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Temperature: 30°F Wind Speed: 18 to 23 mph Wind Direction: NW Forecast: Mostly clear, with a low around 30. Wind chill values as low as 18. Northwest wind 18 to 23 mph. |
Monday |
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Temperature: 37°F Wind Speed: 13 to 17 mph Wind Direction: W Forecast: Mostly sunny, with a high near 37. Wind chill values as low as 18. West wind 13 to 17 mph. |
Monday Night |
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Temperature: 33°F Wind Speed: 13 mph Wind Direction: SW Forecast: A chance of snow after 1am. Mostly cloudy. Low around 33, with temperatures rising to around 35 overnight. Southwest wind around 13 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible. |
Tuesday |
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Temperature: 43°F Wind Speed: 12 to 16 mph Wind Direction: SW Forecast: A chance of snow before 7am, then rain and snow. Cloudy, with a high near 43. Chance of precipitation is 80%. New snow accumulation of less than half an inch possible. |
Tuesday Night |
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Temperature: 36°F Wind Speed: 16 to 22 mph Wind Direction: W Forecast: A chance of rain before 7pm. Mostly cloudy, with a low around 36. Chance of precipitation is 40%. |
Wednesday |
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Temperature: 41°F Wind Speed: 12 to 22 mph Wind Direction: NW Forecast: Sunny, with a high near 41. |
Wednesday Night |
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Temperature: 34°F Wind Speed: 6 to 9 mph Wind Direction: NW Forecast: A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 34. |
Christmas Day |
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Temperature: 43°F Wind Speed: 8 to 12 mph Wind Direction: SW Forecast: A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 40%. |
Thursday Night |
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Temperature: 39°F Wind Speed: 10 mph Wind Direction: SW Forecast: A chance of rain. Mostly cloudy, with a low around 39. Chance of precipitation is 30%. |
Friday |
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Temperature: 47°F Wind Speed: 12 to 15 mph Wind Direction: W Forecast: A chance of rain. Partly sunny, with a high near 47. Chance of precipitation is 30%. |
Friday Night |
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Temperature: 37°F Wind Speed: 14 mph Wind Direction: NW Forecast: A slight chance of rain. Mostly cloudy, with a low around 37. |
Saturday |
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Temperature: 42°F Wind Speed: 13 mph Wind Direction: NW Forecast: A slight chance of rain. Mostly cloudy, with a high near 42. |