Weather in Port Jefferson, New York, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Port Jefferson
This Afternoon |
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Temperature: 18°F Wind Speed: 15 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 18. Wind chill values as low as -1. Northwest wind around 15 mph. |
Tonight |
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Temperature: 15°F Wind Speed: 9 to 13 mph Wind Direction: N Forecast: A chance of snow after 4am. Mostly cloudy. Low around 15, with temperatures rising to around 17 overnight. Wind chill values as low as 3. North wind 9 to 13 mph. Chance of precipitation is 30%. |
Sunday |
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Temperature: 31°F Wind Speed: 9 to 25 mph Wind Direction: NE Forecast: Snow. Cloudy. High near 31, with temperatures falling to around 26 in the afternoon. Wind chill values as low as 1. Northeast wind 9 to 25 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible. |
Sunday Night |
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Temperature: 25°F Wind Speed: 20 to 29 mph Wind Direction: NE Forecast: Snow before 7pm, then snow and sleet. Cloudy. Low around 25, with temperatures rising to around 30 overnight. Wind chill values as low as 12. Northeast wind 20 to 29 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible. |
Monday |
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Temperature: 30°F Wind Speed: 15 to 21 mph Wind Direction: N Forecast: Snow. Mostly cloudy. High near 30, with temperatures falling to around 27 in the afternoon. North wind 15 to 21 mph. Chance of precipitation is 80%. New snow accumulation of around one inch possible. |
Monday Night |
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Temperature: 16°F Wind Speed: 23 to 26 mph Wind Direction: NW Forecast: A chance of snow before 1am. Partly cloudy, with a low around 16. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible. |
Tuesday |
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Temperature: 21°F Wind Speed: 18 to 23 mph Wind Direction: W Forecast: Mostly sunny, with a high near 21. |
Tuesday Night |
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Temperature: 15°F Wind Speed: 17 to 21 mph Wind Direction: W Forecast: Partly cloudy, with a low around 15. |
Wednesday |
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Temperature: 23°F Wind Speed: 16 mph Wind Direction: W Forecast: Mostly sunny, with a high near 23. |
Wednesday Night |
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Temperature: 15°F Wind Speed: 10 to 15 mph Wind Direction: NW Forecast: Mostly cloudy, with a low around 15. |
Thursday |
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Temperature: 22°F Wind Speed: 10 to 17 mph Wind Direction: NW Forecast: A slight chance of snow after 7am. Partly sunny, with a high near 22. |
Thursday Night |
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Temperature: 12°F Wind Speed: 21 mph Wind Direction: NW Forecast: A slight chance of snow before 1am. Partly cloudy, with a low around 12. |
Friday |
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Temperature: 23°F Wind Speed: 17 to 21 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 23. |
Friday Night |
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Temperature: 16°F Wind Speed: 17 to 21 mph Wind Direction: NW Forecast: Mostly clear, with a low around 16. |