Worst air pollution Waikiki - Honolulu, today and tomorrow
Today (9 August): Air quality in Waikiki is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM10: 58.1/100).
Tomorrow (10 August 2026): Air quality in Waikiki is poor. AQI worsens to poor; PM10 increases to poor; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 62.1/100). 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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Honolulu's Waikiki air quality benefits from its exceptional Pacific Ocean and Diamond Head coastal position, with consistent northeast Pacific trade winds providing reliable and powerful maritime ventilation along the famous beach resort corridor. Vehicle traffic on Kalakaua Avenue and the concentrated resort development contribute seasonal local sources, while the outstanding Pacific trade wind exposure and the open ocean geometry generally maintain Waikiki among Hawaii's more reliably ventilated major resort environments throughout most of the year.
Today - 9 August | Pollution peaks at 23:00
AQI:
Medium
58.1/100
PM2.5 (fine particles):
Medium
43.7/100
PM10 (coarse particles):
Medium
58.1/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
20.0/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
6.8/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 00:00
AQI:
Poor
62.1/100
PM2.5 (fine particles):
Medium
43.0/100
PM10 (coarse particles):
Poor
62.1/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
21.4/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
6.1/100
Other Landmarks in Honolulu
Frequently Asked Questions
Is air quality bad in Waikiki right now?
On 9 August 2026, overall air quality in Waikiki is fair. O3 is the main pollutant at 20.0/100. Pollution peaks around 11:00 PM (PM10: 58.1/100).
Will air quality be worse tomorrow in Waikiki?
On 10 August 2026, air quality conditions in Waikiki will be worse than today, with AQI forecast at poor at 62.1/100. Pollution peaks around 12:00 AM (PM10: 62.1/100).
When is air pollution at its worst in Waikiki?
Conditions at Waikiki vary noticeably across the seasons, as spring and autumn tend to bring the cleanest, most stable air; by contrast, hot, humid summer conditions drive ozone formation, especially during heat waves. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Waikiki 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: 10 August 2026 at 02:34 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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