Nearby Harbors
40.9500’ N, 73.0767’ W

Port Jefferson, NY

72°
H -°
L 66°
SW
6mph
High tide
1:55 am
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Port Jefferson, NY Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Sep 13 		Partly Cloudy
Close Hourly 		-º / 66º 15% W 10 mph 92%
10pm Clear 72º 3% SW 6 mph 95%
11pm Mostly Clear 72º 5% SW 6 mph 95%
Mon
Sep 14 		Partly Cloudy
View Hourly 		73º / 56º 7% NNW 16 mph 53%
12am Mostly Clear 72º 6% SW 6 mph 94%
1am Partly Cloudy 72º 6% SW 5 mph 97%
2am Mostly Cloudy 72º 15% WSW 5 mph 96%
3am Mostly Cloudy 72º 15% W 6 mph 92%
4am Mostly Cloudy 71º 15% NW 8 mph 90%
5am Mostly Cloudy 70º 15% NNW 10 mph 86%
6am Mostly Cloudy 69º 12% NNW 10 mph 76%
7am Partly Cloudy 67º 7% NNW 11 mph 77%
8am Partly Cloudy 68º 2% NNW 12 mph 72%
9am Mostly Sunny 68º 1% NNW 14 mph 65%
10am Sunny 68º 1% NNW 15 mph 62%
11am Sunny 70º 0% NNW 15 mph 57%
12pm Sunny 70º 0% NNW 16 mph 51%
1pm Sunny 71º 0% NNW 16 mph 47%
2pm Sunny 72º 0% NNW 16 mph 43%
3pm Sunny 72º 0% NNW 16 mph 40%
4pm Sunny 72º 0% NNW 15 mph 40%
5pm Sunny 72º 0% NNW 15 mph 41%
6pm Sunny 70º 0% NNW 15 mph 43%
7pm Sunny 68º 0% NNW 13 mph 47%
8pm Clear 67º 0% N 13 mph 51%
9pm Clear 65º 0% N 12 mph 54%
10pm Clear 64º 0% N 11 mph 58%
11pm Clear 63º 0% N 9 mph 61%
Tue
Sep 15 		Mostly Sunny
View Hourly 		70º / 58º 3% ENE 9 mph 61%
12am Clear 62º 0% N 9 mph 63%
1am Clear 61º 1% NNE 8 mph 64%
2am Clear 61º 1% NNE 9 mph 65%
3am Clear 60º 1% NE 9 mph 66%
4am Clear 59º 1% NNE 9 mph 68%
5am Clear 58º 2% NNE 8 mph 70%
6am Clear 58º 2% NE 8 mph 72%
7am Sunny 57º 3% NE 8 mph 74%
8am Sunny 60º 2% NE 8 mph 70%
9am Sunny 62º 1% NE 9 mph 65%
10am Sunny 64º 1% ENE 9 mph 63%
11am Sunny 65º 1% ENE 8 mph 61%
12pm Mostly Sunny 66º 0% ENE 7 mph 59%
1pm Partly Cloudy 67º 2% ENE 7 mph 58%
2pm Partly Cloudy 68º 0% ENE 7 mph 58%
3pm Partly Cloudy 69º 0% E 7 mph 56%
4pm Mostly Sunny 69º 0% E 6 mph 56%
5pm Mostly Sunny 69º 0% ESE 6 mph 55%
6pm Partly Cloudy 68º 1% SSE 7 mph 59%
7pm Sunny 66º 2% SSE 7 mph 64%
8pm Clear 64º 3% SSE 7 mph 71%
9pm Clear 62º 4% SSE 6 mph 76%
Wed
Sep 16 		Partly Cloudy 77º / 66º 5% SW 8 mph 68%
Thu
Sep 17 		Partly Cloudy 78º / 67º 10% SSW 11 mph 74%
Fri
Sep 18 		Partly Cloudy 78º / 61º 22% NNW 10 mph 66%
Sat
Sep 19 		Partly Cloudy 73º / 63º 17% E 9 mph 63%
Sun
Sep 20 		AM Showers 74º / 60º 37% NE 10 mph 71%

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 : 68ºF
Variable winds less than 5 kt becoming W 5 to 8 kt after midnight. A slight chance of showers after 5am. Seas 1 ft or less.
Monday
High : 70ºF
NNW wind 11 to 14 kt, with gusts as high as 20 kt. A slight chance of showers before 8am. Seas 1 ft or less.
Monday Night
Low : 57ºF
N wind 11 to 13 kt becoming NE after midnight. Clear. Seas 1 ft or less.
Tuesday
High : 70ºF
NE wind 5 to 10 kt becoming variable and less than 5 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
Low : 62ºF
SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly clear. Seas 1 ft or less.
Wednesday
High : 75ºF
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Wednesday Night
Low : 65ºF
S wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 1 ft or less.
Thursday
High : 78ºF
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Thursday Night
Low : 67ºF
SSW wind around 7 kt becoming WSW after midnight. Mostly cloudy. 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) 65101516151198977
    2am6am10am2pm6pm10pm2am6am10am2pm6pm10pm
    MPH 65101516151198977
    DIR SWWSWNNWNNWNNWNNWNNNENEENEENESSE

    Current Weather Conditions In Port Jefferson, NY

    As Of: 36 minutes ago

    • 72ºF
    • 72ºF
    • 6mph
    • 0º (SW)
    • 6mph
    • Clear
    • 10mi
    • 29.87"
    • 95%
    • 0ºF

    The weather right now in Port Jefferson, NY is Clear. The current temperature is 72°F, and the expected high and low for today, Sunday, September 13, 2026, are -° high temperature and 66°F low temperature. The wind is currently blowing at 6 miles per hour, and coming from the Southwest. The wind is gusting to 6 mph. With the wind and the atmosphere the temperature feels like 72° Fahrenheit. Expected precipitation is 3 percent, with current humidity at 95 percent, and air pressure at 29.87 in. Visibility is 10 nautical miles. There are no current weather alert(s).

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