Nearby Harbors
40.9500’ N, 73.0767’ W

Port Jefferson, NY

56°
H -°
L 55°
ENE
16mph
High tide
12:47 am
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Port Jefferson, NY Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Oct 11 		Rain Early
Close Hourly 		-º / 55º 96% NE 18 mph 97%
10pm Cloudy 56º 23% ENE 16 mph 98%
11pm Cloudy 56º 22% NE 16 mph 99%
Mon
Oct 12 		AM Clouds/PM Sun
View Hourly 		71º / 56º 24% NNW 14 mph 78%
12am Cloudy 57º 18% NE 16 mph 99%
1am Cloudy 58º 16% NE 15 mph 100%
2am Cloudy 57º 15% NNE 14 mph 99%
3am Cloudy 56º 15% NNE 15 mph 98%
4am Cloudy 56º 24% NNE 16 mph 96%
5am Cloudy 57º 24% NNE 16 mph 94%
6am Cloudy 56º 24% NNE 16 mph 94%
7am Few Showers 57º 34% NNE 14 mph 92%
8am Cloudy 57º 24% NNE 14 mph 90%
9am Cloudy 58º 20% NNE 14 mph 87%
10am Mostly Cloudy 59º 6% NNE 13 mph 84%
11am Partly Cloudy 61º 5% N 11 mph 81%
12pm Partly Cloudy 63º 4% N 10 mph 76%
1pm Sunny 66º 3% NNW 9 mph 73%
2pm Sunny 68º 2% NNW 9 mph 70%
3pm Partly Cloudy 69º 2% NW 10 mph 68%
4pm Sunny 69º 2% NW 10 mph 68%
5pm Sunny 69º 2% NW 10 mph 69%
6pm Sunny 67º 3% NW 9 mph 73%
7pm Clear 66º 4% NW 7 mph 77%
8pm Clear 64º 5% NW 5 mph 81%
9pm Partly Cloudy 64º 6% NW 6 mph 85%
10pm Mostly Clear 63º 6% NNW 5 mph 87%
11pm Clear 62º 6% NNW 5 mph 87%
Tue
Oct 13 		Partly Cloudy
View Hourly 		70º / 64º 17% SE 11 mph 81%
12am Clear 61º 7% NNW 4 mph 89%
1am Mostly Clear 60º 7% NNW 4 mph 92%
2am Partly Cloudy 59º 7% NNW 3 mph 92%
3am Clear 58º 7% NNW 3 mph 94%
4am Clear 58º 7% N 3 mph 96%
5am Clear 58º 8% NNE 4 mph 97%
6am Mostly Clear 57º 8% NE 6 mph 97%
7am Partly Cloudy 57º 8% E 7 mph 98%
8am Partly Cloudy 59º 16% E 6 mph 94%
9am Partly Cloudy 61º 12% ESE 7 mph 91%
10am Partly Cloudy 64º 6% ESE 7 mph 84%
11am Partly Cloudy 65º 7% SE 7 mph 79%
12pm Partly Cloudy 67º 13% SE 8 mph 77%
1pm Partly Cloudy 68º 4% SSE 8 mph 74%
2pm Partly Cloudy 68º 6% SSE 10 mph 74%
3pm Partly Cloudy 69º 6% S 10 mph 72%
4pm Partly Cloudy 69º 14% S 10 mph 73%
5pm Partly Cloudy 68º 8% S 11 mph 76%
6pm Partly Cloudy 66º 18% S 10 mph 81%
7pm Showers 65º 37% S 11 mph 85%
8pm Mostly Cloudy 65º 9% SSW 10 mph 87%
9pm Showers 66º 38% SSW 11 mph 87%
Wed
Oct 14 		Partly Cloudy 77º / 56º 13% W 11 mph 72%
Thu
Oct 15 		Partly Cloudy 65º / 54º 4% NNE 11 mph 61%
Fri
Oct 16 		Rain 65º / 44º 78% SSW 16 mph 82%
Sat
Oct 17 		Partly Cloudy/Wind 52º / 41º 8% NW 22 mph 44%
Sun
Oct 18 		Mostly Sunny 55º / 45º 8% NW 14 mph 52%

Weather Radar for Port Jefferson, NY See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Port Jefferson, NY

Tonight
Low : 55ºF
ENE wind 19 to 22 kt becoming NNE after midnight. Rain and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms, mainly between midnight and 5am. Seas around 2 ft.
Columbus Day
High : 70ºF
NNE wind 11 to 16 kt becoming NNW 5 to 8 kt in the afternoon. A slight chance of rain before 8am. Seas 1 to 2 ft.
Monday Night
Low : 56ºF
NNW wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.
Tuesday
High : 69ºF
Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. Mostly sunny. Seas 1 ft or less.
Tuesday Night
Low : 61ºF
SW wind 11 to 13 kt. A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Seas 1 to 2 ft.
Wednesday
High : 73ºF
W wind around 11 kt. Sunny. Seas around 1 ft.
Wednesday Night
Low : 57ºF
WNW wind 6 to 9 kt becoming NNW after midnight. Mostly cloudy. Seas 1 ft or less.
Thursday
High : 64ºF
N wind 8 to 11 kt. Mostly sunny. Seas 1 ft or less.
Thursday Night
Low : 53ºF
N wind around 7 kt becoming E after midnight. A chance of showers. Seas 1 ft or less.

NOAA Buoy Data Near Port Jefferson, NY See Map

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    Wind Speed Forecast for Port Jefferson, NY

    MondayTuesday
    Wind Speed (MPH) 161416139953671010
    2am6am10am2pm6pm10pm2am6am10am2pm6pm10pm
    MPH 161416139953671010
    DIR ENENNENNENNENNWNWNNWNNWNEESESSES

    Current Weather Conditions In Port Jefferson, NY

    As Of: 8 minutes ago

    • 56ºF
    • 53ºF
    • 16mph
    • 0º (ENE)
    • 28mph
    • Cloudy
    • 3mi
    • 29.88"
    • 98%
    • 0ºF

    The weather right now in Port Jefferson, NY is Cloudy. The current temperature is 56°F, and the expected high and low for today, Sunday, October 11, 2026, are -° high temperature and 55°F low temperature. The wind is currently blowing at 16 miles per hour, and coming from the East Northeast. The wind is gusting to 28 mph. With the wind and the atmosphere the temperature feels like 53° Fahrenheit. Expected precipitation is 23 percent, with current humidity at 98 percent, and air pressure at 29.88 in. Visibility is 3 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 2:57pm Sun Oct 11 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT MONDAY...

    WHAT: NE winds 20 to 25 kt with gusts up to 30 kt and seas 3
    to 5 ft expected.

    WHERE: Long Island Sound west of Orient Point and the
    Connecticut River.

    WHEN: Until 6 AM EDT Monday.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&

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