Worst air pollution Key West, today and tomorrow
Today (30 August): Air quality in Key West is moderate. AQI, PM2.5, and PM10 are moderate; O3 is fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM10: 58.1/100).
Tomorrow (31 August 2026): Air quality in Key West is moderate. O3 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 56.4/100). Airmine updates local air quality forecasts four times daily.
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Key West experiences air quality conditions shaped chiefly by tropical maritime air, and Saharan dust plumes crossing the Atlantic occasionally raise summer haze. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Checking current readings is still the best way to plan outdoor activity around Key West.
Today - 30 August | Pollution peaks at 23:00
AQI:
Moderate
58.1/100
PM2.5 (fine particles):
Moderate
46.7/100
PM10 (coarse particles):
Moderate
58.1/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
24.5/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
7.9/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 00:00
AQI:
Moderate
56.4/100
PM2.5 (fine particles):
Moderate
45.9/100
PM10 (coarse particles):
Moderate
56.4/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Good
19.8/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
7.4/100
Pollen forecast in Key West
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Key West
Frequently Asked Questions
Is air quality bad in Key West right now?
On 30 August 2026, overall air quality in Key West is moderate. AQI is the main air quality indicator at 58.1/100. Pollution peaks around 11:00 PM (PM10: 58.1/100).
Will air quality be worse tomorrow in Key West?
On 31 August 2026, air quality conditions in Key West will be similar to today, with AQI forecast at moderate at 56.4/100. Pollution peaks around 12:00 AM (PM10: 56.4/100).
When is air pollution at its worst in Key West?
Key West follows a fairly predictable seasonal air quality pattern: daily summer storms tend to scrub the air clean before pollution can build up, but the drier months from roughly November through April bring the highest risk of wildfire and prescribed-burn smoke. Inland areas tend to see more smoke buildup than locations closer to the coast.
Are air quality levels in Key West 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: 30 August 2026 at 20:26 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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