Worst air pollution Southernmost Point - Key West, today and tomorrow
Today (9 August): Air quality in Southernmost Point is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 68.2/100).
Tomorrow (10 August 2026): Air quality in Southernmost Point is poor. All pollutants stay as today. Pollution peaks around 11:00 PM (PM10: 72.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Key West's Southernmost Point air quality benefits from its exceptional Atlantic Ocean and Gulf of Mexico dual-coastal island position at the southernmost continental US location, with consistent Atlantic and Gulf trade winds providing outstanding maritime ventilation. Vehicle traffic on South Street contributes modest seasonal sources, while the extraordinary dual-ocean exposure and the consistent trade wind geometry generally maintain Key West among Florida's most reliably ventilated coastal communities throughout most of the year.
Today - 9 August | Pollution peaks at 00:00
AQI:
Poor
68.2/100
PM2.5 (fine particles):
Medium
52.3/100
PM10 (coarse particles):
Poor
68.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
26.8/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
10.6/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 23:00
AQI:
Poor
72.6/100
PM2.5 (fine particles):
Medium
52.1/100
PM10 (coarse particles):
Poor
72.6/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
28.7/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
12.0/100
Other Landmarks in Key West
Frequently Asked Questions
Is air quality bad in Southernmost Point right now?
On 9 August 2026, overall air quality in Southernmost Point is poor. AQI is the main air quality indicator at 68.2/100. Pollution peaks around 12:00 AM (PM10: 68.2/100).
Will air quality be worse tomorrow in Southernmost Point?
On 10 August 2026, air quality conditions in Southernmost Point will be similar to today, with AQI forecast at poor at 72.6/100. Pollution peaks around 11:00 PM (PM10: 72.6/100).
When is air pollution at its worst in Southernmost Point?
At Southernmost Point, air quality tends to follow Key West's broader seasonal rhythm, as the wet season's frequent storms generally keep particulate levels lower than in the dry months; by contrast, wildfire and prescribed-burn smoke are most common in the drier months from autumn through spring. Sea breezes help disperse pollution on most days, though smoke from inland fires can still drift into populated areas.
Are air quality levels in Southernmost Point based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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