Worst air pollution Shinjuku Gyoen - Tokyo, today and tomorrow
Today (17 August): Air quality in Shinjuku Gyoen is fair. AQI and PM1 are fair; PM2.5, PM10, NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (PM1: 24.4/100).
Tomorrow (18 August 2026): Air quality in Shinjuku Gyoen is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 AM (PM1: 32.2/100). 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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Tokyo's Shinjuku Gyoen air quality benefits from the 58-hectare imperial garden's substantial green space buffer against the surrounding Shinjuku commercial intensity, with the garden's woodland and formal landscape providing natural filtration. Vehicle emissions from the surrounding Shinjuku arterial roads are the primary local concern, while the park interior's extensive tree canopy generally maintains noticeably better conditions than the dense surrounding commercial streets throughout most of the day.
Today - 17 August | Pollution peaks at 23:00
AQI:
Fair
24.4/100
PM2.5 (fine particles):
Good
18.8/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
19.2/100
O3 (ozone):
Good
12.9/100
SO2 (sulfur dioxide):
Good
11.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Fair
24.4/100
Levels show the poorest local air quality during the day
Tomorrow - 18 August | Pollution peaks at 06:00
AQI:
Fair
32.2/100
PM2.5 (fine particles):
Fair
24.8/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Good
16.6/100
O3 (ozone):
Good
11.0/100
SO2 (sulfur dioxide):
Good
19.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Fair
32.2/100
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Frequently Asked Questions
Is air quality bad in Shinjuku Gyoen right now?
On 17 August 2026, overall air quality in Shinjuku Gyoen is fair. AQI is the main air quality indicator at 24.4/100. Pollution peaks around 11:00 PM (PM1: 24.4/100).
Will air quality be worse tomorrow in Shinjuku Gyoen?
On 18 August 2026, air quality conditions in Shinjuku Gyoen will be similar to today, with AQI forecast at fair at 32.2/100. Pollution peaks around 6:00 AM (PM1: 32.2/100).
When is air pollution at its worst in Shinjuku Gyoen?
The most noticeable dips in Shinjuku Gyoen's air quality come when local tree and grass allergens peaks, or because of vehicle emissions from the nearby Shinjuku arterial roads; the remainder of the year, the local setting keeps things noticeably clearer than average.
Are air quality levels in Shinjuku Gyoen 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: 17 August 2026 at 14:32 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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