Be the first to measure and contribute air quality data to your community
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in Port Jefferson
Air quality index (AQI) and PM2.5 air pollution in Port Jefferson
94 people follow this city
Port Jefferson Air Quality Map
Real-time Port Jefferson air pollution map
AIR QUALITY DATA SOURCE
* AQI modeled using satellite data Learn more
Pollen
What is the pollen count in Port Jefferson today?
 | Index | Very high | |
 | Tree pollen | Very high | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Port Jefferson?
| Weather | Broken clouds |
| Temperature | 53.6°F |
| Humidity | 75% |
| Wind | 9.2 mp/h |
| Pressure | 30.2 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Durham, North Carolina | 126 |
| 2 | San Bernardino, California | 79 |
| 3 | Yucaipa, California | 75 |
| 4 | Redlands, California | 66 |
| 5 | Riverside, California | 64 |
| 6 | Vernal, Utah | 64 |
| 7 | Lake Arrowhead, California | 62 |
| 8 | Nampa, Idaho | 62 |
| 9 | Corpus Christi, Texas | 61 |
| 10 | Fontana, California | 61 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
US AQI
27*
live AQI index
Good
Overview
What is the current air quality in Port Jefferson?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 27* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 6.6*µg/m³ | |
!
PM2.5
x1.3
PM2.5 concentration in Port Jefferson is currently 1.3 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Port Jefferson?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
Port Jefferson air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Thursday, May 2 | Good 27 AQI US | | 55.4° 48.2° |  13.4 mp/h |
| Today | Good 27 AQI US | | 55.4° 48.2° | 11.2 mp/h |
| Saturday, May 4 | Good 11 AQI US |  100% | 51.8° 48.2° | 11.2 mp/h |
| Sunday, May 5 | Good 31 AQI US | 100% | 62.6° 51.8° | 4.5 mp/h |
| Monday, May 6 | Good 50 AQI US | 80% | 60.8° 55.4° | 6.7 mp/h |
| Tuesday, May 7 | Good 42 AQI US | 60% | 57.2° 53.6° | 8.9 mp/h |
| Wednesday, May 8 | Moderate 56 AQI US  | 80% | 53.6° 50° | 11.2 mp/h |
| Thursday, May 9 | Good 20 AQI US | 100% | 57.2° 50° | 8.9 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Where is the cleanest air quality in Port Jefferson?
No locations are available.
AQI US, Metric