Port Jefferson, NY Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sat
Jun 13 		Partly Cloudy
Close Hourly 		-º / 66º 4% WSW 6 mph 70%
10pm Partly Cloudy 74º 1% W 5 mph 63%
11pm Partly Cloudy 72º 1% W 4 mph 68%
Sun
Jun 14 		Partly Cloudy
View Hourly 		87º / 65º 1% SSW 18 mph 49%
12am Mostly Cloudy 70º 1% W 3 mph 73%
1am Partly Cloudy 70º 1% W 3 mph 73%
2am Mostly Cloudy 68º 2% WNW 3 mph 76%
3am Mostly Cloudy 67º 2% W 2 mph 77%
4am Mostly Cloudy 67º 2% W 2 mph 77%
5am Partly Cloudy 68º 4% SW 3 mph 74%
6am Partly Cloudy 68º 3% SSW 3 mph 72%
7am Partly Cloudy 72º 2% SSW 4 mph 66%
8am Partly Cloudy 75º 0% SW 6 mph 61%
9am Partly Cloudy 79º 0% SW 8 mph 52%
10am Partly Cloudy 83º 0% SW 9 mph 44%
11am Partly Cloudy 85º 0% SW 10 mph 40%
12pm Partly Cloudy 86º 0% SSW 12 mph 38%
1pm Partly Cloudy 86º 0% SSW 15 mph 41%
2pm Mostly Cloudy 85º 0% SSW 17 mph 44%
3pm Mostly Cloudy 85º 1% SSW 17 mph 47%
4pm Mostly Cloudy 83º 0% SSW 18 mph 48%
5pm Mostly Cloudy 81º 0% S 18 mph 49%
6pm Mostly Cloudy 78º 0% S 17 mph 53%
7pm Cloudy 76º 1% S 16 mph 59%
8pm Mostly Cloudy 74º 7% S 15 mph 66%
9pm Cloudy 72º 9% S 14 mph 74%
10pm Cloudy 71º 24% S 14 mph 83%
11pm Scattered Thunderstorms 70º 48% S 12 mph 88%
Mon
Jun 15 		Mostly Sunny
View Hourly 		77º / 57º 6% NW 14 mph 50%
12am Thunderstorms 69º 61% SSW 12 mph 94%
1am Thunderstorms 69º 77% SSW 10 mph 97%
2am Scattered Thunderstorms 69º 55% SSW 10 mph 98%
3am Few Showers 68º 32% SSW 9 mph 98%
4am Cloudy 68º 24% SW 10 mph 97%
5am Mostly Cloudy 68º 24% W 10 mph 96%
6am Partly Cloudy 66º 9% NW 12 mph 91%
7am Partly Cloudy 67º 7% NW 12 mph 80%
8am Mostly Sunny 69º 2% NW 13 mph 68%
9am Mostly Sunny 70º 1% NW 14 mph 60%
10am Sunny 71º 0% NW 14 mph 53%
11am Sunny 72º 0% NW 14 mph 49%
12pm Sunny 73º 0% NW 13 mph 45%
1pm Sunny 74º 0% WNW 12 mph 44%
2pm Sunny 75º 0% WNW 13 mph 41%
3pm Mostly Sunny 76º 0% WNW 14 mph 38%
4pm Sunny 76º 0% WNW 14 mph 38%
5pm Partly Cloudy 76º 0% WNW 13 mph 38%
6pm Partly Cloudy 75º 0% WNW 13 mph 40%
7pm Partly Cloudy 73º 0% NW 13 mph 43%
8pm Partly Cloudy 71º 0% NW 11 mph 46%
9pm Clear 69º 0% NW 10 mph 51%
Tue
Jun 16 		Mostly Sunny 76º / 60º 1% W 11 mph 44%
Wed
Jun 17 		Showers 74º / 62º 49% SSE 13 mph 69%
Thu
Jun 18 		PM Showers 80º / 68º 37% S 18 mph 75%
Fri
Jun 19 		Showers 83º / 64º 36% W 14 mph 57%
Sat
Jun 20 		Sunny 83º / 64º 3% W 15 mph 45%

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 : 67ºF
SW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Sunday
High : 85ºF
Variable winds less than 5 kt becoming SSW 9 to 14 kt in the morning. Winds could gust as high as 20 kt. Increasing clouds. Seas 1 ft or less.
Sunday Night
Low : 65ºF
S wind 11 to 16 kt becoming SW after midnight. Winds could gust as high as 22 kt. Showers and thunderstorms before 2am, then a chance of showers. Seas 1 ft or less.
Monday
High : 79ºF
W wind 9 to 13 kt. A slight chance of showers before 8am. Seas 1 ft or less.
Monday Night
Low : 61ºF
WNW wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Mostly clear. Seas 1 ft or less.
Tuesday
High : 78ºF
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
Low : 63ºF
SSW wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Seas 1 ft or less.
Wednesday
High : 77ºF
Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Wednesday Night
Low : 64ºF
S wind 5 to 7 kt. 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

    SundayMonday
    Wind Speed (MPH) 53391717141012141313
    2am6am10am2pm6pm10pm2am6am10am2pm6pm10pm
    MPH 53391717141012141313
    DIR WWNWSSWSWSSWSSSSWNWNWWNWWNW

    Current Weather Conditions In Port Jefferson, NY

    As Of: 24 minutes ago

    • 74ºF
    • 74ºF
    • 5mph
    • 0º (W)
    • 5mph
    • Partly Cloudy
    • 10mi
    • 29.88"
    • 63%
    • 0ºF

    The weather right now in Port Jefferson, NY is Partly Cloudy. The current temperature is 74°F, and the expected high and low for today, Saturday, June 13, 2026, are -° high temperature and 66°F low temperature. The wind is currently blowing at 5 miles per hour, and coming from the West. The wind is gusting to 5 mph. With the wind and the atmosphere the temperature feels like 74° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 63 percent, and air pressure at 29.88 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 2:11pm Sat Jun 13 2026

    ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM SUNDAY TO MIDNIGHT EDT SUNDAY NIGHT...

    WHAT: South winds 15 to 20 kt with gusts up to 25 kt and seas
    1 to 3 feet expected.

    WHERE: Long Island Sound west of Port Jefferson and New
    Haven, and New York Harbor.

    WHEN: From 2 PM Sunday to midnight EDT Sunday night.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

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

    &&