Port Jefferson, NY Weather Forecast and Current Conditions
| Day | Sky | High / Low | Precip | Wind | Humidity | |
|---|---|---|---|---|---|---|
|
Sun Aug 2 |
 |
Thunderstorms Late | -º / 74º | 100% | S 15 mph | 95% |
|
Mon Aug 3 |
|
Heavy Thunderstorms View Hourly |
78º / 66º | 84% | SSW 17 mph | 92% |
| 1am |  |
Cloudy | 77º | 20% | S 11 mph | 93% |
| 2am | |
Heavy Thunderstorms | 77º | 60% | S 14 mph | 93% |
| 3am | |
Thunderstorms | 77º | 100% | S 15 mph | 94% |
| 4am | |
Thunderstorms | 76º | 90% | SSW 15 mph | 94% |
| 5am | |
Thunderstorms | 76º | 100% | SSW 14 mph | 95% |
| 6am | |
Thunderstorms | 75º | 100% | SSW 15 mph | 96% |
| 7am | |
Thunderstorms | 75º | 93% | SSW 15 mph | 97% |
| 8am | |
Thunderstorms | 76º | 79% | SSW 17 mph | 95% |
| 9am | |
Thunderstorms | 76º | 84% | SSW 17 mph | 94% |
| 10am | |
Thunderstorms | 77º | 84% | SSW 17 mph | 94% |
| 11am | |
Heavy Thunderstorms | 76º | 78% | SSW 16 mph | 94% |
| 12pm |  |
Rain | 76º | 78% | SSW 16 mph | 94% |
| 1pm | |
Rain | 77º | 78% | SSW 16 mph | 91% |
| 2pm | |
Thunderstorms | 77º | 68% | SSW 17 mph | 92% |
| 3pm |  |
Scattered Thunderstorms | 77º | 53% | SSW 17 mph | 92% |
| 4pm |  |
Isolated Thunderstorms | 78º | 34% | SSW 16 mph | 88% |
| 5pm | |
Scattered Thunderstorms | 78º | 57% | SSW 15 mph | 87% |
| 6pm |  |
Showers | 78º | 48% | SW 13 mph | 84% |
| 7pm | |
Few Showers | 78º | 31% | SW 10 mph | 82% |
| 8pm |  |
Partly Cloudy | 77º | 21% | WSW 8 mph | 80% |
| 9pm |  |
Partly Cloudy | 76º | 6% | W 7 mph | 83% |
| 10pm | |
Partly Cloudy | 75º | 5% | WNW 8 mph | 80% |
| 11pm | |
Partly Cloudy | 73º | 6% | WNW 8 mph | 81% |
|
Tue Aug 4 |
|
Partly Cloudy View Hourly |
83º / 66º | 4% | N 7 mph | 59% |
| 12am | |
Partly Cloudy | 72º | 5% | NW 8 mph | 81% |
| 1am | |
Partly Cloudy | 71º | 5% | NW 8 mph | 79% |
| 2am | |
Partly Cloudy | 70º | 5% | NNW 7 mph | 80% |
| 3am | |
Partly Cloudy | 69º | 5% | NNW 7 mph | 80% |
| 4am | |
Partly Cloudy | 68º | 5% | NNW 6 mph | 82% |
| 5am |  |
Mostly Clear | 68º | 5% | NNW 5 mph | 83% |
| 6am |  |
Sunny | 67º | 5% | NNW 5 mph | 84% |
| 7am | |
Partly Cloudy | 69º | 4% | N 5 mph | 82% |
| 8am | |
Partly Cloudy | 71º | 3% | N 6 mph | 77% |
| 9am | |
Partly Cloudy | 73º | 2% | N 6 mph | 70% |
| 10am | |
Partly Cloudy | 75º | 1% | N 6 mph | 65% |
| 11am | |
Partly Cloudy | 77º | 1% | N 7 mph | 59% |
| 12pm | |
Partly Cloudy | 79º | 0% | N 7 mph | 54% |
| 1pm | |
Partly Cloudy | 80º | 0% | N 6 mph | 50% |
| 2pm |  |
Mostly Cloudy | 81º | 0% | N 6 mph | 47% |
| 3pm | |
Mostly Cloudy | 81º | 0% | SSE 6 mph | 48% |
| 4pm | |
Partly Cloudy | 82º | 0% | S 6 mph | 49% |
| 5pm | |
Partly Cloudy | 81º | 0% | S 6 mph | 49% |
| 6pm | |
Partly Cloudy | 80º | 0% | S 7 mph | 53% |
| 7pm | |
Partly Cloudy | 78º | 0% | S 6 mph | 59% |
| 8pm | |
Partly Cloudy | 76º | 1% | S 5 mph | 64% |
| 9pm | |
Partly Cloudy | 74º | 3% | SSW 5 mph | 69% |
| 10pm | |
Partly Cloudy | 73º | 4% | S 4 mph | 72% |
| 11pm | |
Partly Cloudy | 72º | 5% | S 3 mph | 76% |
|
Wed Aug 5 |
 |
AM Showers View Hourly |
82º / 73º | 31% | SSE 9 mph | 76% |
| 12am | |
Partly Cloudy | 71º | 6% | S 3 mph | 81% |
|
Thu Aug 6 |
|
AM Showers | 86º / 73º | 31% | SSW 12 mph | 78% |
|
Fri Aug 7 |
|
Isolated Thunderstorms | 87º / 73º | 31% | SW 11 mph | 73% |
|
Sat Aug 8 |
|
PM Thunderstorms | 86º / 72º | 55% | SW 10 mph | 72% |
|
Sun Aug 9 |
|
Partly Cloudy | 86º / 72º | 24% | SW 11 mph | 71% |
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Buoy Data
For Port Jefferson, NY -
Wind Forecast
In Port Jefferson, NY -
Radar
In Port Jefferson, NY -
Marine Forecast
In Port Jefferson, NY
Weather Radar for Port Jefferson, NY See Radar
* Playback displays weather for the past 6 hours.
NOAA Weather Marine Forecast for Port Jefferson, NY
Tonight
Low : 72ºF
S wind 8 to 11 kt increasing to 12 to 15 kt after midnight. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
S wind 8 to 11 kt increasing to 12 to 15 kt after midnight. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Monday
High : 78ºF
SSW wind 14 to 17 kt, with gusts as high as 23 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
SSW wind 14 to 17 kt, with gusts as high as 23 kt. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Seas 1 ft or less.
Monday Night
Low : 69ºF
SW wind around 9 kt becoming NNW after midnight. Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 11pm. Seas 1 ft or less.
SW wind around 9 kt becoming NNW after midnight. Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 11pm. Seas 1 ft or less.
Tuesday
High : 79ºF
NNW wind around 6 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.
NNW wind around 6 kt becoming SW in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
Low : 69ºF
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Wednesday
High : 79ºF
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Wednesday Night
Low : 71ºF
S wind 5 to 7 kt. Mostly cloudy. Seas 1 ft or less.
S wind 5 to 7 kt. Mostly cloudy. Seas 1 ft or less.
Thursday
High : 84ºF
Variable winds less than 5 kt becoming SSW 5 to 8 kt in the morning. Mostly sunny. Seas 1 ft or less.
Variable winds less than 5 kt becoming SSW 5 to 8 kt in the morning. Mostly sunny. Seas 1 ft or less.
Thursday Night
Low : 73ºF
SSW wind 6 to 8 kt. A chance of showers. Seas 1 ft or less.
SSW wind 6 to 8 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
| Monday | Tuesday | Wednesday | ||||||||||
| Wind Speed (MPH) | 11 | 14 | 17 | 16 | 15 | 7 | 8 | 5 | 6 | 6 | 6 | 5 |
| 5am | 9am | 1pm | 5pm | 9pm | 1am | 5am | 9am | 1pm | 5pm | 9pm | 1am | |
| MPH | 11 | 14 | 17 | 16 | 15 | 7 | 8 | 5 | 6 | 6 | 6 | 5 |
| DIR | S | SSW | SSW | SSW | SSW | W | NW | NNW | N | N | S | SSW |
Current Weather Conditions In Port Jefferson, NY
As Of: 35 minutes ago
- 77ºF
- 77ºF
- 11mph
- 0º (S)
- 22mph
- Cloudy
- 7mi
- 29.81"
- 93%
- 0ºF
The weather right now in Port Jefferson, NY is Cloudy. The current temperature is 77°F, and the expected high and low for today, Monday, August 3, 2026, are -° high temperature and 74°F low temperature. The wind is currently blowing at 11 miles per hour, and coming from the South. The wind is gusting to 22 mph. With the wind and the atmosphere the temperature feels like 77° Fahrenheit. Expected precipitation is 20 percent, with current humidity at 93 percent, and air pressure at 29.81 in. Visibility is 7 nautical miles. There are no current weather alert(s).
