Air quality
Air quality in Bissau today
Updated
Unhealthy for Sensitive Groups (US AQI 102) People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. Model estimate for Mon, Oct 26, 2:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Bissau, Guinea-Bissau, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 102 Unhealthy for Sensitive Groups
- PM2.5
- 53 µg/m³ 3.5× WHO 24-h guideline
- PM10
- 76 µg/m³
- Ozone
- 39 µg/m³
- Dominant pollutant
- PM2.5 sub-index 102
- Best hour today
- 6:00 am AQI 116
- European AQI
- 61
Air quality in Bissau right now
Right now the modelled US Air Quality Index for Bissau, Guinea-Bissau is 102, which falls in the "Unhealthy for Sensitive Groups" band (up to 150). People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 102. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 53 µg/m³, 3.5 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 76 µg/m³ against a guideline of 45; ozone is 39 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 1.6 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 161 µg/m³.
Bissau AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 102 around Mon 2:00 am to 153 around Tue 1:00 am, from "Unhealthy for Sensitive Groups" at best to "Unhealthy" at worst.
The following day is expected to be worse, averaging about 142 against 135 for the next 24 hours.
| Local time (Africa/Bissau) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 2:00 am | 102 | Unhealthy for Sensitive Groups | 52.5 | 76 | 39 |
| Mon 5:00 am | 112 | Unhealthy for Sensitive Groups | 62.4 | 89 | 41 |
| Mon 8:00 am | 124 | Unhealthy for Sensitive Groups | 64.7 | 94 | 44 |
| Mon 11:00 am | 136 | Unhealthy for Sensitive Groups | 61.7 | 99 | 65 |
| Mon 2:00 pm | 142 | Unhealthy for Sensitive Groups | 57.9 | 97 | 83 |
| Mon 5:00 pm | 147 | Unhealthy for Sensitive Groups | 58.7 | 102 | 73 |
| Mon 8:00 pm | 151 | Unhealthy | 63.1 | 102 | 57 |
| Mon 11:00 pm | 152 | Unhealthy | 51.3 | 75 | 48 |
| Tue 2:00 am | 152 | Unhealthy | 44.9 | 70 | 46 |
| Tue 5:00 am | 151 | Unhealthy | 45.3 | 75 | 41 |
| Tue 8:00 am | 149 | Unhealthy for Sensitive Groups | 47.7 | 87 | 51 |
| Tue 11:00 am | 145 | Unhealthy for Sensitive Groups | 52.5 | 109 | 68 |
| Tue 2:00 pm | 143 | Unhealthy for Sensitive Groups | 49.2 | 105 | 74 |
| Tue 5:00 pm | 139 | Unhealthy for Sensitive Groups | 44 | 93 | 64 |
| Tue 8:00 pm | 135 | Unhealthy for Sensitive Groups | 44.2 | 76 | 52 |
| Tue 11:00 pm | 129 | Unhealthy for Sensitive Groups | 43.9 | 74 | 48 |
| Wed 2:00 am | 128 | Unhealthy for Sensitive Groups | 42.4 | 72 | 44 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Bissau today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 6:00 am (AQI 116, Unhealthy for Sensitive Groups) and the worst around 8:00 pm (AQI 151). That is a swing of 35 points, so a run or walk around 6:00 am is noticeably better.
Air quality in cities near Bissau
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Serekunda | 211 km | 162 | Unhealthy | 64.7 |
| Kaolack | 260 km | 153 | Unhealthy | 56.3 |
| Mbour | 321 km | 168 | Unhealthy | 56.1 |
| Mbaké | 327 km | 153 | Unhealthy | 54.4 |
| Dixinn | 332 km | 59 | Moderate | 15 |
| Camayenne | 333 km | 59 | Moderate | 15 |
| Conakry | 333 km | 59 | Moderate | 15 |
| Touba | 335 km | 153 | Unhealthy | 54.4 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Bissau, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Wildfire smoke
PM2.5 is forecast to reach 65 µg/m³ in the next 24 hours while NASA satellites detected 81 fire hotspots within 300 km in the last day (nearest about 135 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 102, children, older adults, pregnant people and anyone with asthma, COPD or heart disease should limit time outdoors, especially strenuous activity. A well-fitted N95/FFP2 mask cuts particle exposure; it does not filter ozone.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Bissau
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.