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Port Jefferson, NY Marine Weather Forecast

This Afternoon - 57°F
Mar 11, 2025
10 mph S
Sunny
Sunny. High near 57, with temperatures falling to around 55 in the afternoon. South wind around 10 mph.
Tonight - 39°F
Mar 11, 2025
3 to 9 mph W
Mostly Clear
Mostly clear, with a low around 39. West wind 3 to 9 mph.
Wednesday - 48°F
Mar 12, 2025
5 to 9 mph NE
Partly Sunny
Partly sunny, with a high near 48. Northeast wind 5 to 9 mph.
Wednesday Night - 38°F
Mar 12, 2025
5 to 8 mph E
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 38. East wind 5 to 8 mph. Chance of precipitation is 20%.
Thursday - 43°F
Mar 13, 2025
8 to 12 mph E
Slight Chance Rain Showers then Chance Drizzle
A slight chance of rain showers before 8am, then a chance of drizzle. Mostly cloudy, with a high near 43. East wind 8 to 12 mph. Chance of precipitation is 20%.
Thursday Night - 38°F
Mar 13, 2025
7 to 10 mph NE
Chance Drizzle
A chance of drizzle before 2am, then a chance of drizzle and patchy fog. Mostly cloudy, with a low around 38.
Friday - 48°F
Mar 14, 2025
8 mph E
Chance Drizzle then Mostly Cloudy
A chance of drizzle and patchy fog before 8am. Mostly cloudy, with a high near 48.
Friday Night - 42°F
Mar 14, 2025
7 mph E
Mostly Cloudy
Mostly cloudy, with a low around 42.
Saturday - 53°F
Mar 15, 2025
5 to 14 mph SE
Slight Chance Rain Showers
A slight chance of rain showers after 8am. Cloudy, with a high near 53.
Saturday Night - 50°F
Mar 15, 2025
14 to 23 mph S
Chance Rain Showers
A chance of rain showers. Cloudy, with a low around 50. Chance of precipitation is 30%.
Sunday - 57°F
Mar 16, 2025
23 to 30 mph S
Rain Showers Likely
Rain showers likely. Cloudy, with a high near 57. Chance of precipitation is 60%.
Sunday Night - 47°F
Mar 16, 2025
16 to 30 mph SW
Rain Showers
Rain showers. Mostly cloudy, with a low around 47. Chance of precipitation is 80%.
Monday - 52°F
Mar 17, 2025
16 mph W
Rain Showers Likely
Rain showers likely. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Monday Night - 39°F
Mar 17, 2025
17 mph NW
Chance Rain Showers
A chance of rain showers before 2am. Partly cloudy, with a low around 39. Chance of precipitation is 30%.

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