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Port Jefferson Harbor Entrance, NY Marine Weather Forecast

Tonight - 32°F
Jan 30, 2025
8 to 13 mph SW
Mostly Cloudy then Slight Chance Light Rain
A slight chance of rain after 4am. Mostly cloudy. Low around 32, with temperatures rising to around 34 overnight. Wind chill values as low as 24. Southwest wind 8 to 13 mph. Chance of precipitation is 20%.
Friday - 43°F
Jan 31, 2025
2 to 13 mph SW
Light Rain
Rain. Cloudy. High near 43, with temperatures falling to around 39 in the afternoon. Southwest wind 2 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night - 35°F
Jan 31, 2025
2 to 12 mph W
Light Rain
Rain before 4am. Cloudy. Low around 35, with temperatures rising to around 37 overnight. West wind 2 to 12 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday - 38°F
Feb 01, 2025
14 to 17 mph N
Mostly Sunny
Mostly sunny. High near 38, with temperatures falling to around 33 in the afternoon. Wind chill values as low as 23. North wind 14 to 17 mph.
Saturday Night - 24°F
Feb 01, 2025
8 to 15 mph N
Mostly Clear
Mostly clear, with a low around 24. North wind 8 to 15 mph.
Sunday - 40°F
Feb 02, 2025
7 to 12 mph E
Mostly Cloudy
Mostly cloudy. High near 40, with temperatures falling to around 38 in the afternoon.
Sunday Night - 38°F
Feb 02, 2025
10 to 14 mph S
Chance Rain And Snow
A chance of rain and snow after 7pm. Cloudy, with a low around 38. Chance of precipitation is 40%.
Monday - 47°F
Feb 03, 2025
14 to 17 mph SW
Chance Light Rain then Mostly Cloudy
A chance of rain before 7am. Mostly cloudy, with a high near 47. Chance of precipitation is 30%.
Monday Night - 35°F
Feb 03, 2025
17 mph W
Mostly Cloudy
Mostly cloudy, with a low around 35.
Tuesday - 39°F
Feb 04, 2025
15 mph NW
Mostly Sunny
Mostly sunny, with a high near 39.
Tuesday Night - 31°F
Feb 04, 2025
7 to 13 mph NW
Partly Cloudy
Partly cloudy, with a low around 31.
Wednesday - 39°F
Feb 05, 2025
9 mph W
Slight Chance Light Snow
A slight chance of snow between 7am and 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
Wednesday Night - 35°F
Feb 05, 2025
10 mph S
Chance Rain And Snow
A chance of rain and snow. Mostly cloudy, with a low around 35. Chance of precipitation is 50%.
Thursday - 45°F
Feb 06, 2025
14 mph S
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 45. Chance of precipitation is 50%.

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