Worst air pollution Diamond Head - Honolulu, today and tomorrow
Today (15 July): Air quality in Diamond Head is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (PM10: 57.2/100).
Tomorrow (16 July 2026): Air quality in Diamond Head is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 55.0/100). 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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Honolulu's Diamond Head air quality benefits from the direct Pacific Ocean and Diamond Head crater position, with consistent and powerful northeast Pacific trade winds providing outstanding maritime ventilation around this iconic volcanic landmark. Vehicle traffic on Diamond Head Road and the surrounding affluent residential and park character contribute modest local sources, while the extraordinary Pacific trade wind exposure and the open ocean geometry generally maintain Diamond Head among Honolulu's more reliably clean environments throughout most of the year.
Today - 15 July | Pollution peaks at 21:00
AQI:
Medium
57.2/100
PM2.5 (fine particles):
Medium
44.1/100
PM10 (coarse particles):
Medium
57.2/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
6.5/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 00:00
AQI:
Medium
55.0/100
PM2.5 (fine particles):
Medium
43.4/100
PM10 (coarse particles):
Medium
55.0/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
6.1/100
Other Landmarks in Honolulu
Frequently Asked Questions
Is air quality bad in Diamond Head right now?
On 15 July 2026, overall air quality in Diamond Head is fair. O3 is the main pollutant at 23.3/100. Pollution peaks around 9:00 PM (PM10: 57.2/100).
Will air quality be worse tomorrow in Diamond Head?
On 16 July 2026, air quality conditions in Diamond Head will be similar to today, with O3 forecast at fair at 23.3/100. Pollution peaks around 12:00 AM (PM10: 55.0/100).
When is air pollution at its worst in Diamond Head?
Diamond Head experiences the same seasonal air quality swings as the rest of Honolulu: between summer ozone and occasional winter inversions, spring and fall are the year's cleanest stretch, but prolonged summer heat waves are when air quality most often dips into unhealthy territory. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Diamond Head 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