Smog in Hong Kong Today — Live Data: City AQI, PM2.5 & PM10, Weather Warnings and Forecast

1 weather warning in effect for Hong Kong ⛈️ Thunderstorms

Locations

Hong Kong

22 PM2.5 µg/m³

Moderate

PM10 24 NO₂ 62 O₃ 26

Yuen Long Kau Hui

22 PM2.5 µg/m³

Moderate

PM10 24 NO₂ 62 O₃ 26

Current data Thursday, August 27, 2026 at 9:00 AM

PM2,5 22 (Moderate)

PM10 24 (Moderate)

O3 26 (Good)

NO2 62 (Moderate)

SO2 31 (Good)

CO 310 (Good)

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
PM2,5	22 Moderate	22 Moderate	20 Moderate	20 Moderate	30 Moderate	28 Moderate	21 Moderate	15 Moderate
PM10	25 Moderate	26 Moderate	24 Moderate	23 Moderate	34 Moderate	32 Moderate	25 Moderate	18 Good
O3	44 Good	38 Good	51 Good	50 Good	54 Good	61 Good	38 Good	50 Good
NO2	54 Moderate	50 Moderate	43 Moderate	43 Moderate	54 Moderate	57 Moderate	48 Moderate	38 Good
SO2	31 Good	34 Good	32 Good	29 Good	31 Good	33 Good	40 Good	34 Good
CO	273 Good	255 Good	243 Good	231 Good	356 Good	310 Good	302 Good	254 Good

data source »

pollution pm25 hikersbay.com — Air pollution in Hong Kong from January 2018 to May 2020

index	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10	2018-09	2018-08	2018-07	2018-06	2018-05	2018-04	2018-03	2018-02	2018-01
	8.9 Good	16 Moderate	18 Moderate	17 Moderate	21 Moderate	25 Moderate	26 Moderate	26 Moderate	19 Moderate	12 Good	10 Good	9 Good	15 Moderate	16 Moderate	18 Moderate	18 Moderate	29 Moderate	22 Moderate	22 Moderate	23 Moderate	18 Moderate	12 Good	9.6 Good	12 Good	11 Good	24 Moderate	22 Moderate	28 Moderate	21 Moderate
PM10	17 Good	28 Moderate	31 Moderate	29 Moderate	34 Moderate	44 Moderate	49 Moderate	43 Moderate	32 Moderate	21 Moderate	21 Moderate	16 Good	27 Moderate	25 Moderate	30 Moderate	28 Moderate	46 Moderate	35 Moderate	35 Moderate	40 Moderate	29 Moderate	20 Moderate	18 Good	21 Moderate	18 Good	42 Moderate	38 Moderate	44 Moderate	37 Moderate
NO2	27 Good	40 Good	38 Good	39 Good	43 Moderate	52 Moderate	47 Moderate	44 Moderate	38 Good	38 Good	28 Good	34 Good	36 Good	35 Good	45 Moderate	42 Moderate	57 Moderate	46 Moderate	43 Moderate	47 Moderate	41 Moderate	40 Good	27 Good	33 Good	31 Good	43 Moderate	46 Moderate	54 Moderate	44 Moderate
O3	29 Good	60 Good	50 Good	45 Good	52 Good	60 Good	88 Moderate	96 Moderate	82 Moderate	45 Good	32 Good	27 Good	55 Good	49 Good	45 Good	42 Good	46 Good	29 Good	58 Good	82 Moderate	43 Good	39 Good	28 Good	38 Good	30 Good	51 Good	58 Good	42 Good	42 Good

data source »

Quality of life in Hong Kong

Green and Parks in the City

Hong Kong 52%

Taiwan: 53% Mexico: 56% laoPDR: 37% Vietnam: 42%

Pleasure of spending time in the city

Hong Kong 43%

Taiwan: 47% Mexico: 57% laoPDR: 38% Vietnam: 30%

Air Pollution

Hong Kong 67%

Taiwan: 61% Mexico: 53% laoPDR: 72% Vietnam: 78%

Garbage Disposal

Hong Kong 52%

Taiwan: 65% Mexico: 52% laoPDR: 20% Vietnam: 24%

Availability and quality of drinking water

Hong Kong 66%

Taiwan: 54% Mexico: 57% laoPDR: 51% Vietnam: 43%

Cleanliness and tidiness

Hong Kong 54%

Taiwan: 56% Mexico: 45% laoPDR: 32% Vietnam: 29%

Noise and Light pollution

Hong Kong 66%

Taiwan: 59% Mexico: 48% laoPDR: 55% Vietnam: 65%

Water Pollution

Hong Kong 53%

Taiwan: 58% Mexico: 55% laoPDR: 73% Vietnam: 73%

Source: Numbeo

* Pollution data source: https://openaq.org (Hong Kong, ChinaAQIData) The data is licensed under CC-By 4.0

Frequently asked questions

Is the air safe to breathe in Hong Kong today?

The current average PM2.5 across Hong Kong is about 22 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Hong Kong?

Right now PM2.5 in Hong Kong averages about 22 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which cities in Hong Kong have the best and worst air quality now?

Hong Kong currently has the highest PM2.5 (22 µg/m³), while Yuen Long Kau Hui has the cleanest air (22 µg/m³).

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.

☀️ UV Index · 16-day Forecast — Hong Kong

The UV index in Hong Kong today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.

🌊 Sea Temperature · 16-day Forecast — Hong Kong

The sea temperature at Hong Kong today is about 29°C.

🌊 Sea Temperature By Month — Hong Kong

18° Jan

19° Feb

21° Mar

24° Apr

27° May

29° Jun

29° Jul

29° Aug

29° Sep

28° Oct

25° Nov

21° Dec

The sea around Hong Kong is warmest in July (about 29°C) and coldest in January (about 18°C) — long-term monthly averages.

🌦️ Weather · 16-day Forecast — Hong Kong

16-day weather forecast for Hong Kong: today around 32°C (rain), lows near 28°C. Daily temperature and conditions, updated every day.