Worst air pollution Saiki, today and tomorrow
Today (10 August): Air quality in Saiki is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 14.7/100).
Tomorrow (11 August 2026): Air quality in Saiki is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 61.5/100). 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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Saiki's air quality benefits from its exceptional Oita Prefecture Hyuga Sea and Pacific Ocean coastal position, with consistent Pacific and Bungo Channel maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the timber, fishing, and manufacturing corridor contribute local sources, while the outstanding coastal exposure and the surrounding Sobo-Katamuki mountain backdrop create topographic variation and Saiki generally maintains good to moderate conditions for a Japanese Pacific coastal city.
Today - 10 August | Pollution peaks at 18:00
AQI:
Good
14.7/100
PM2.5 (fine particles):
Good
6.6/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
5.6/100
O3 (ozone):
Good
14.7/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
4.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 16:00
AQI:
Poor
61.5/100
PM2.5 (fine particles):
Good
15.0/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Good
20.0/100
O3 (ozone):
Poor
61.5/100
SO2 (sulfur dioxide):
Good
10.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
9.8/100
Frequently Asked Questions
Is air quality bad in Saiki right now?
On 10 August 2026, overall air quality in Saiki is good. AQI is the main air quality indicator at 14.7/100. Pollution peaks around 6:00 PM (O3: 14.7/100).
Will air quality be worse tomorrow in Saiki?
On 11 August 2026, air quality conditions in Saiki will be worse than today, with AQI forecast at poor at 61.5/100. Pollution peaks around 4:00 PM (O3: 61.5/100).
When is air pollution at its worst in Saiki?
Saiki usually sees its poorest air quality when road traffic, textile and manufacturing operations, and port and shipping activity coincide with periods when onshore breezes fall calm. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Saiki 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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