Worst air pollution Haikou, today and tomorrow
Today (10 August): Air quality in Haikou is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 74.0/100).
Tomorrow (11 August 2026): Air quality in Haikou is poor. PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 AM (O3: 79.3/100). 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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Haikou's air quality benefits from its exceptional Hainan Island tropical coastal position on the Qiongzhou Strait, with consistent South China Sea trade winds providing reliable maritime ventilation. Vehicle traffic on surrounding expressways and the free trade port, technology, and tourism corridor contribute local sources, while the outstanding tropical island coastal exposure and the frequent convective rain generally maintain Haikou among China's cleaner major tropical coastal cities throughout most of the year.
Today - 10 August | Pollution peaks at 11:00
AQI:
Poor
74.0/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Poor
74.0/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.2/100
PM1 (ultrafine particles):
Good
16.6/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 05:00
AQI:
Poor
79.3/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Poor
79.3/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.1/100
PM1 (ultrafine particles):
Fair
22.1/100
Frequently Asked Questions
Is air quality bad in Haikou right now?
On 10 August 2026, overall air quality in Haikou is poor. AQI is the main air quality indicator at 74.0/100. Pollution peaks around 11:00 AM (O3: 74.0/100).
Will air quality be worse tomorrow in Haikou?
On 11 August 2026, air quality conditions in Haikou will be similar to today, with AQI forecast at poor at 79.3/100. Pollution peaks around 5:00 AM (O3: 79.3/100).
When is air pollution at its worst in Haikou?
Pollution in Haikou typically rises when vehicle traffic together with seasonal tourism traffic combine, especially once the sea breeze weakens. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This natural ventilation is one reason coastal areas often see better readings than inland cities.
Are air quality levels in Haikou 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: 9 August 2026 at 20:27 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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