Porto: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast
- particulate matter (PM2.5) dust - 5 (Good)
- particulate matter (PM10) suspended dust - 10 (Good)
- ozone (O3) - 56 (Good)
- nitrogen dioxide (NO2) - 7 (Good)
- sulfur dioxide (SO2) - 1 (Good)
- carbon monoxide (CO) - 164 (Good)
What is the air quality in Porto today? Is the air polluted in Porto?. Is there smog?
What is the current level of PM2.5 in Porto? (particulate matter (PM2.5) dust)
Today's PM2.5 level is:
5 (Good)
For comparison, the highest level of PM2.5 in Porto in the last 7 days was: 11 (Friday, August 21, 2026) and the lowest: 4 (Thursday, August 27, 2026).
The highest PM2.5 values were recorded: 50 (September 2018).
The lowest level of particulate matter PM2.5 pollution occurs in month: September (1.1).
What is the level of PM10 today in Porto? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Porto is:
10 (Good)
The highest PM10 values usually occur in month: 60 (October 2017).
The lowest value of particulate matter PM10 pollution in Porto is usually recorded in: September (7.2).
How is the O3 level today in Porto? (ozone (O3))
56 (Good)
How high is the level of NO2? (nitrogen dioxide (NO2))
7 (Good)
What is the level of SO2 pollution? (sulfur dioxide (SO2))
1 (Good)
How high is the CO level? (carbon monoxide (CO))
164 (Good)
Current data Thursday, August 27, 2026 at 2:00 AM
PM2,5 5 (Good)
PM10 10 (Good)
O3 56 (Good)
NO2 7 (Good)
SO2 1 (Good)
CO 164 (Good)
Data on air pollution from recent days in Porto
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
6
Good
6
Good
4
Good
8
Good
9
Good
11
Good
10
Good
pm10
7
Good
10
Good
12
Good
9
Good
12
Good
16
Good
20
Moderate
18
Good
o3
61
Good
69
Good
69
Good
66
Good
61
Good
62
Good
61
Good
58
Good
no2
6
Good
7
Good
8
Good
5
Good
9
Good
12
Good
9
Good
10
Good
so2
1
Good
1
Good
1
Good
1
Good
2
Good
2
Good
1
Good
2
Good
co
158
Good
150
Good
145
Good
140
Good
168
Good
166
Good
174
Good
140
Good
data source »
Air pollution in Porto 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
2017-10
2017-09
no2
41 (Moderate)
46 (Moderate)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
6.6 (Good)
11 (Good)
8 (Good)
13 (Good)
32 (Good)
50 (Moderate)
71 (Moderate)
89 (Moderate)
83 (Moderate)
81 (Moderate)
69 (Moderate)
75 (Moderate)
66 (Moderate)
63 (Moderate)
43 (Moderate)
43 (Moderate)
59 (Moderate)
50 (Moderate)
45 (Moderate)
92 (Moderate)
88 (Moderate)
- (Good)
- (Good)
co
417 (Good)
397 (Good)
490 (Good)
655 (Good)
710 (Good)
605 (Good)
382 (Good)
584 (Good)
576 (Good)
456 (Good)
446 (Good)
472 (Good)
398 (Good)
357 (Good)
506 (Good)
712 (Good)
261 (Good)
468 (Good)
313 (Good)
305 (Good)
303 (Good)
246 (Good)
159 (Good)
164 (Good)
209 (Good)
250 (Good)
230 (Good)
4 (Good)
461 (Good)
388 (Good)
- (Good)
o3
74 (Moderate)
74 (Moderate)
66 (Good)
55 (Good)
52 (Good)
47 (Good)
43 (Good)
31 (Good)
40 (Good)
35 (Good)
31 (Good)
- (Good)
53 (Good)
66 (Good)
30 (Good)
34 (Good)
32 (Good)
29 (Good)
44 (Good)
46 (Good)
43 (Good)
50 (Good)
49 (Good)
52 (Good)
70 (Moderate)
70 (Good)
67 (Good)
42 (Good)
34 (Good)
38 (Good)
26 (Good)
pm10
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
7.2 (Good)
13 (Good)
15 (Good)
11 (Good)
15 (Good)
15 (Good)
23 (Moderate)
26 (Moderate)
13 (Good)
16 (Good)
18 (Good)
22 (Moderate)
25 (Moderate)
25 (Moderate)
10 (Good)
8.5 (Good)
18 (Good)
25 (Moderate)
21 (Moderate)
12 (Good)
22 (Moderate)
60 (Unhealthy for Sensitive Groups)
- (Good)
pm25
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
- (Good)
7.2 (Good)
11 (Good)
14 (Moderate)
14 (Moderate)
12 (Good)
23 (Moderate)
11 (Good)
50 (Unhealthy for Sensitive Groups)
- (Good)
- (Good)
- (Good)
6.4 (Good)
7 (Good)
6 (Good)
8 (Good)
8.7 (Good)
1.8 (Good)
1.1 (Good)
data source »
Quality of life in Porto
Green and Parks in the City
Porto
83%
Morocco: 41%
Andorra: 69%
Spain: 70%
France: 61%
particulate matter PM2.5
Porto
5 (Good)
Pleasure of spending time in the city
Porto
88%
Morocco: 41%
Andorra: 84%
Spain: 76%
France: 68%
particulate matter PM10
Porto
11 (Good)
Air Pollution
Porto
22%
Morocco: 63%
Andorra: 29%
Spain: 30%
France: 36%
Garbage Disposal
Porto
77%
Morocco: 33%
Andorra: 89%
Spain: 73%
France: 59%
Availability and quality of drinking water
Porto
88%
Morocco: 55%
Andorra: 100%
Spain: 74%
France: 73%
Cleanliness and tidiness
Porto
75%
Morocco: 39%
Andorra: 75%
Spain: 66%
France: 48%
Noise and Light pollution
Porto
33%
Morocco: 55%
Andorra: 29%
Spain: 46%
France: 54%
Water Pollution
Porto
22%
Morocco: 54%
Andorra: 19%
Spain: 29%
France: 39%
Source: Numbeo
Porto
Thursday, August 27, 2026 at 2:00 AM
PM2,5 5.3 (Good)
particulate matter (PM2.5) dust
PM10 9.8 (Good)
particulate matter (PM10) suspended dust
O3 56 (Good)
ozone (O3)
NO2 6.5 (Good)
nitrogen dioxide (NO2)
SO2 1.3 (Good)
sulfur dioxide (SO2)
CO 164 (Good)
carbon monoxide (CO)
Porto
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
9.9
11
9.3
8.4
4.1
6
5.7
3.6
pm10
18
20
16
12
8.9
12
10
6.6
o3
58
61
62
61
66
69
69
61
no2
10
8.7
12
9.3
4.7
7.7
6.6
5.6
so2
1.8
1.5
1.9
1.8
0.78
1
1.3
0.87
co
140
174
166
168
140
145
150
158
PT01028
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
2017-10
pm10
-
-
-
-
-
-
-
-
7.2
13
15
11
15
15
23
26
13
16
18
22
25
25
10
8.5
18
25
21
12
22
60
co
417
397
490
655
710
605
382
584
576
456
446
472
398
357
506
712
261
468
313
305
303
246
159
164
209
250
230
4
461
388
no2
41
46
-
-
-
-
-
-
6.6
11
8
13
32
50
71
89
83
81
69
75
66
63
43
43
59
50
45
92
88
-
PT01050
2017-09 2020-05
index
2020-05
2020-04
2020-03
2020-02
2020-01
2019-12
2019-11
2019-10
2019-09
2019-08
2019-07
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
2017-10
2017-09
pm25
-
-
-
-
-
-
-
-
-
-
-
-
7.2
11
14
14
12
23
11
50
-
-
-
6.4
7
6
8
8.7
1.8
1.1
o3
74
74
66
55
52
47
43
31
40
35
31
53
66
30
34
32
29
44
46
43
50
49
52
70
70
67
42
34
38
26
* Pollution data source:
https://openaq.org
(EEA Portugal)
The data is licensed under CC-By 4.0
🌦️ Weather · 16-day Forecast — Porto
PM2,5 5 (Good)
PM10 10 (Good)
O3 56 (Good)
NO2 7 (Good)
SO2 1 (Good)
CO 164 (Good)
Data on air pollution from recent days in Porto
| 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 |
6 Good |
6 Good |
4 Good |
8 Good |
9 Good |
11 Good |
10 Good |
| pm10 | 7 Good |
10 Good |
12 Good |
9 Good |
12 Good |
16 Good |
20 Moderate |
18 Good |
| o3 | 61 Good |
69 Good |
69 Good |
66 Good |
61 Good |
62 Good |
61 Good |
58 Good |
| no2 | 6 Good |
7 Good |
8 Good |
5 Good |
9 Good |
12 Good |
9 Good |
10 Good |
| so2 | 1 Good |
1 Good |
1 Good |
1 Good |
2 Good |
2 Good |
1 Good |
2 Good |
| co | 158 Good |
150 Good |
145 Good |
140 Good |
168 Good |
166 Good |
174 Good |
140 Good |
| 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 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| no2 | 41 (Moderate) | 46 (Moderate) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | 6.6 (Good) | 11 (Good) | 8 (Good) | 13 (Good) | 32 (Good) | 50 (Moderate) | 71 (Moderate) | 89 (Moderate) | 83 (Moderate) | 81 (Moderate) | 69 (Moderate) | 75 (Moderate) | 66 (Moderate) | 63 (Moderate) | 43 (Moderate) | 43 (Moderate) | 59 (Moderate) | 50 (Moderate) | 45 (Moderate) | 92 (Moderate) | 88 (Moderate) | - (Good) | - (Good) |
| co | 417 (Good) | 397 (Good) | 490 (Good) | 655 (Good) | 710 (Good) | 605 (Good) | 382 (Good) | 584 (Good) | 576 (Good) | 456 (Good) | 446 (Good) | 472 (Good) | 398 (Good) | 357 (Good) | 506 (Good) | 712 (Good) | 261 (Good) | 468 (Good) | 313 (Good) | 305 (Good) | 303 (Good) | 246 (Good) | 159 (Good) | 164 (Good) | 209 (Good) | 250 (Good) | 230 (Good) | 4 (Good) | 461 (Good) | 388 (Good) | - (Good) |
| o3 | 74 (Moderate) | 74 (Moderate) | 66 (Good) | 55 (Good) | 52 (Good) | 47 (Good) | 43 (Good) | 31 (Good) | 40 (Good) | 35 (Good) | 31 (Good) | - (Good) | 53 (Good) | 66 (Good) | 30 (Good) | 34 (Good) | 32 (Good) | 29 (Good) | 44 (Good) | 46 (Good) | 43 (Good) | 50 (Good) | 49 (Good) | 52 (Good) | 70 (Moderate) | 70 (Good) | 67 (Good) | 42 (Good) | 34 (Good) | 38 (Good) | 26 (Good) |
| pm10 | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | 7.2 (Good) | 13 (Good) | 15 (Good) | 11 (Good) | 15 (Good) | 15 (Good) | 23 (Moderate) | 26 (Moderate) | 13 (Good) | 16 (Good) | 18 (Good) | 22 (Moderate) | 25 (Moderate) | 25 (Moderate) | 10 (Good) | 8.5 (Good) | 18 (Good) | 25 (Moderate) | 21 (Moderate) | 12 (Good) | 22 (Moderate) | 60 (Unhealthy for Sensitive Groups) | - (Good) |
| pm25 | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | 7.2 (Good) | 11 (Good) | 14 (Moderate) | 14 (Moderate) | 12 (Good) | 23 (Moderate) | 11 (Good) | 50 (Unhealthy for Sensitive Groups) | - (Good) | - (Good) | - (Good) | 6.4 (Good) | 7 (Good) | 6 (Good) | 8 (Good) | 8.7 (Good) | 1.8 (Good) | 1.1 (Good) |
Green and Parks in the City
Porto 83%
Morocco: 41% Andorra: 69% Spain: 70% France: 61%particulate matter PM2.5
Porto 5 (Good)
Pleasure of spending time in the city
Porto 88%
Morocco: 41% Andorra: 84% Spain: 76% France: 68%particulate matter PM10
Porto 11 (Good)
Air Pollution
Porto 22%
Morocco: 63% Andorra: 29% Spain: 30% France: 36%Garbage Disposal
Porto 77%
Morocco: 33% Andorra: 89% Spain: 73% France: 59%Availability and quality of drinking water
Porto 88%
Morocco: 55% Andorra: 100% Spain: 74% France: 73%Cleanliness and tidiness
Porto 75%
Morocco: 39% Andorra: 75% Spain: 66% France: 48%Noise and Light pollution
Porto 33%
Morocco: 55% Andorra: 29% Spain: 46% France: 54%Water Pollution
Porto 22%
Morocco: 54% Andorra: 19% Spain: 29% France: 39%PM2,5 5.3 (Good)
particulate matter (PM2.5) dustPM10 9.8 (Good)
particulate matter (PM10) suspended dustO3 56 (Good)
ozone (O3)NO2 6.5 (Good)
nitrogen dioxide (NO2)SO2 1.3 (Good)
sulfur dioxide (SO2)CO 164 (Good)
carbon monoxide (CO)Porto
| 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 | 9.9 | 11 | 9.3 | 8.4 | 4.1 | 6 | 5.7 | 3.6 |
| pm10 | 18 | 20 | 16 | 12 | 8.9 | 12 | 10 | 6.6 |
| o3 | 58 | 61 | 62 | 61 | 66 | 69 | 69 | 61 |
| no2 | 10 | 8.7 | 12 | 9.3 | 4.7 | 7.7 | 6.6 | 5.6 |
| so2 | 1.8 | 1.5 | 1.9 | 1.8 | 0.78 | 1 | 1.3 | 0.87 |
| co | 140 | 174 | 166 | 168 | 140 | 145 | 150 | 158 |
PT01028
| 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 | 2017-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| pm10 | - | - | - | - | - | - | - | - | 7.2 | 13 | 15 | 11 | 15 | 15 | 23 | 26 | 13 | 16 | 18 | 22 | 25 | 25 | 10 | 8.5 | 18 | 25 | 21 | 12 | 22 | 60 |
| co | 417 | 397 | 490 | 655 | 710 | 605 | 382 | 584 | 576 | 456 | 446 | 472 | 398 | 357 | 506 | 712 | 261 | 468 | 313 | 305 | 303 | 246 | 159 | 164 | 209 | 250 | 230 | 4 | 461 | 388 |
| no2 | 41 | 46 | - | - | - | - | - | - | 6.6 | 11 | 8 | 13 | 32 | 50 | 71 | 89 | 83 | 81 | 69 | 75 | 66 | 63 | 43 | 43 | 59 | 50 | 45 | 92 | 88 | - |
PT01050
| index | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 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 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| pm25 | - | - | - | - | - | - | - | - | - | - | - | - | 7.2 | 11 | 14 | 14 | 12 | 23 | 11 | 50 | - | - | - | 6.4 | 7 | 6 | 8 | 8.7 | 1.8 | 1.1 |
| o3 | 74 | 74 | 66 | 55 | 52 | 47 | 43 | 31 | 40 | 35 | 31 | 53 | 66 | 30 | 34 | 32 | 29 | 44 | 46 | 43 | 50 | 49 | 52 | 70 | 70 | 67 | 42 | 34 | 38 | 26 |
16-day weather forecast for Porto: today around 23°C (rain), lows near 15°C. Daily temperature and conditions, updated every day. Strong wind (about 34 km/h) is actively clearing smog and dust away.
☀️ UV Index · 16-day Forecast — Porto
The UV index in Porto today is 6.6 (high) — unprotected fair skin can burn in about 30 minutes.
📍 Air quality in nearby cities
Live PM2.5 around Porto — compare nearby locations.
- Braga 6 µg/m³
- Coimbra 4 µg/m³
- VigoSpain 3 µg/m³
- Lisbon 5 µg/m³
- Setúbal 5 µg/m³
- Funchal Municipality 4 µg/m³