Worst air pollution Yokosuka, today and tomorrow
Today (16 July): Air quality in Yokosuka is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 32.7/100).
Tomorrow (17 July 2026): Air quality in Yokosuka is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 43.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Yokosuka's air quality reflects the Miura Peninsula's Tokyo Bay and Sagami Bay dual-coastal position, with the US Fleet Activities Yokosuka naval base's military vessel and aviation operations generating elevated maritime NOₓ alongside vehicle traffic on surrounding roads. The outstanding dual-bay coastal exposure provides reliable maritime ventilation, while the naval base's maritime industrial character represents the most distinctive local emission source and Yokosuka generally maintains moderate to good Kanagawa coastal readings throughout most of the year.
Today - 16 July | Pollution peaks at 18:00
AQI:
Fair
32.7/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
32.7/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
8.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Medium
43.8/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Medium
43.8/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
8.2/100
Frequently Asked Questions
Is air quality bad in Yokosuka right now?
On 16 July 2026, overall air quality in Yokosuka is fair. AQI is the main air quality indicator at 32.7/100. Pollution peaks around 6:00 PM (O3: 32.7/100).
Will air quality be worse tomorrow in Yokosuka?
On 17 July 2026, air quality conditions in Yokosuka will be better than today, with AQI forecast at medium at 43.8/100. Pollution peaks around 2:00 PM (O3: 43.8/100).
When is air pollution at its worst in Yokosuka?
Air quality in Yokosuka tends to be worse when road traffic, airport and aviation operations, as well as fishing fleet activity build up and windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Yokosuka 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app