Coimbra: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

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Latest air quality data: Coimbra

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Pollution and air quality forecast for Coimbra. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Coimbra:

particulate matter (PM2.5) dust - 4 (Good)
particulate matter (PM10) suspended dust - 11 (Good)
ozone (O3) - 52 (Good)
nitrogen dioxide (NO2) - 5 (Good)
sulfur dioxide (SO2) - 1 (Good)
carbon monoxide (CO) - 166 (Good)

Real-time Air Quality Index (AQI) for Coimbra, Thursday, August 27, 2026: 1.

AQI 1 Good

What is the air quality in Coimbra today? Is the air polluted in Coimbra?. Is there smog?

Today (Thursday, August 27, 2026) air quality is good. The air quality has no effect on health. Everyone can continue their outdoor activities normally in Coimbra.

What is the current level of PM2.5 in Coimbra? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 4 (Good) For comparison, the highest level of PM2.5 in Coimbra in the last 7 days was: 12 (Friday, August 21, 2026) and the lowest: 4 (Thursday, August 27, 2026).

What is the level of PM10 today in Coimbra? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Coimbra is: 11 (Good) The highest PM10 values usually occur in month: 28 (October 2017). The lowest value of particulate matter PM10 pollution in Coimbra is usually recorded in: November (4.7).

How is the O3 level today in Coimbra? (ozone (O3))
52 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
5 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
1 (Good)

How high is the CO level? (carbon monoxide (CO))
166 (Good)

Current data Thursday, August 27, 2026 at 2:00 AM

PM2,5 4 (Good)

PM10 11 (Good)

O3 52 (Good)

NO2 5 (Good)

SO2 1 (Good)

CO 166 (Good)

Data on air pollution from recent days in Coimbra

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
pm25	4 Good	5 Good	6 Good	4 Good	5 Good	7 Good	12 Good	7 Good
pm10	7 Good	10 Good	11 Good	8 Good	8 Good	14 Good	19 Good	13 Good
o3	54 Good	60 Good	63 Good	64 Good	57 Good	65 Good	64 Good	60 Good
no2	4 Good	6 Good	7 Good	3 Good	5 Good	6 Good	6 Good	4 Good
so2	1 Good	1 Good	1 Good	1 Good	1 Good	1 Good	2 Good	1 Good
co	162 Good	152 Good	145 Good	140 Good	144 Good	161 Good	173 Good	129 Good

data source »

Air pollution in Coimbra from September 2017 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	2017-12	2017-10	2017-09
pm10	13 (Good)	11 (Good)	19 (Good)	19 (Good)	20 (Good)	16 (Good)	15 (Good)	15 (Good)	18 (Good)	17 (Good)	19 (Good)	13 (Good)	13 (Good)	12 (Good)	16 (Good)	23 (Moderate)	18 (Good)	7 (Good)	4.7 (Good)	9 (Good)	22 (Moderate)	22 (Moderate)	14 (Good)	12 (Good)	17 (Good)	18 (Good)	10 (Good)	17 (Good)	17 (Good)	9.2 (Good)	28 (Moderate)	13 (Good)
o3	50 (Good)	59 (Good)	56 (Good)	37 (Good)	38 (Good)	38 (Good)	41 (Good)	40 (Good)	53 (Good)	51 (Good)	50 (Good)	52 (Good)	56 (Good)	55 (Good)	55 (Good)	43 (Good)	35 (Good)	29 (Good)	43 (Good)	52 (Good)	54 (Good)	61 (Good)	53 (Good)	59 (Good)	66 (Good)	60 (Good)	64 (Good)	41 (Good)	32 (Good)	45 (Good)	41 (Good)	39 (Good)
no2	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	10 (Good)	11 (Good)	12 (Good)	12 (Good)	15 (Good)	22 (Good)	21 (Good)	19 (Good)	9.5 (Good)	10 (Good)	19 (Good)	15 (Good)	9 (Good)	9.8 (Good)	14 (Good)	14 (Good)	13 (Good)	23 (Good)	21 (Good)	14 (Good)	24 (Good)	18 (Good)

data source »

Quality of life in Coimbra

Green and Parks in the City

Coimbra 73%

Morocco: 41% Andorra: 69% Spain: 70% France: 61%

particulate matter PM2.5

Coimbra 12 (Good)

Pleasure of spending time in the city

Coimbra 85%

Morocco: 41% Andorra: 84% Spain: 76% France: 68%

particulate matter PM10

Coimbra 17 (Good)

Air Pollution

Coimbra 22%

Morocco: 63% Andorra: 29% Spain: 30% France: 36%

Garbage Disposal

Coimbra 64%

Morocco: 33% Andorra: 89% Spain: 73% France: 59%

Availability and quality of drinking water

Coimbra 81%

Morocco: 55% Andorra: 100% Spain: 74% France: 73%

Cleanliness and tidiness

Coimbra 58%

Morocco: 39% Andorra: 75% Spain: 66% France: 48%

Noise and Light pollution

Coimbra 45%

Morocco: 55% Andorra: 29% Spain: 46% France: 54%

Water Pollution

Coimbra 32%

Morocco: 54% Andorra: 19% Spain: 29% France: 39%

Source: Numbeo

Coimbra

Thursday, August 27, 2026 at 2:00 AM

PM2,5 4.4 (Good)

particulate matter (PM2.5) dust

PM10 11 (Good)

particulate matter (PM10) suspended dust

O3 52 (Good)

ozone (O3)

NO2 4.7 (Good)

nitrogen dioxide (NO2)

SO2 1 (Good)

sulfur dioxide (SO2)

CO 166 (Good)

carbon monoxide (CO)

Coimbra

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	6.9	12	7.1	5.1	3.9	6.3	5.1	3.5
pm10	13	19	14	8.2	8.3	11	9.6	7.4
o3	60	64	65	57	64	63	60	54
no2	4.4	5.9	5.9	4.6	3	6.8	5.6	4.4
so2	1.2	1.6	1.2	0.88	0.55	1.2	0.93	0.78
co	129	173	161	144	140	145	152	162

PT02016

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	2017-12	2017-10	2017-09
pm10	13	11	19	19	20	16	15	15	18	17	19	13	13	12	16	23	18	7	4.7	9	22	22	14	12	17	18	10	17	17	9.2	28	13
no2	-	-	-	-	-	-	-	-	-	-	10	11	12	12	15	22	21	19	9.5	10	19	15	9	9.8	14	14	13	23	21	14	24	18
o3	50	59	56	37	38	38	41	40	53	51	50	52	56	55	55	43	35	29	43	52	54	61	53	59	66	60	64	41	32	45	41	39

* Pollution data source: https://openaq.org (EEA Portugal) The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Coimbra

16-day weather forecast for Coimbra: today around 30°C (rain), lows near 18°C. Daily temperature and conditions, updated every day. Strong wind (about 25 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Coimbra

The UV index in Coimbra today is 6.5 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Coimbra — compare nearby locations.

Porto 5 µg/m³
Braga 6 µg/m³
Lisbon 5 µg/m³
Setúbal 5 µg/m³
Funchal Municipality 4 µg/m³

Frequently asked questions

Is the air safe to breathe in Coimbra today?

The current average PM2.5 across Coimbra is about 4 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.

What is the current PM2.5 level in Coimbra?

Right now PM2.5 in Coimbra averages about 4 µg/m³ (“Good”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Coimbra?

Over the past week, the highest daily PM2.5 in Coimbra was recorded on Friday, August 21 (about 12 µg/m³).

What is the UV index in Coimbra today?

The UV index in Coimbra today is 6.5 (high) — unprotected fair skin can burn in about 30 minutes.

Does today's wind help disperse smog in Coimbra?

Strong wind (about 25 km/h) is actively clearing smog and dust away.

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.