Bissau weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: November – December
What is the weather like in Bissau in August?
In August, Bissau is hot: daytime highs average 28 °C, and even at night it stays warm at around 24 °C. The sea averages 27.9 °C – lovely and warm for swimming. Expect around 4 hours of sunshine a day. It is the rainy season: rain falls on about 29 days, totalling 467 mm. The air is often humid and muggy. All in all, August is a so-so month for a holiday in Bissau.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 43 | 45 | 42 |
| Day | 29° | 28° | 29° |
| Night | 25° | 24° | 24° |
| Sea | 28° | 28° | 28° |
| Sun | 5 h | 4 h | 5 h |
| Rain days | 28 | 29 | 27 |
More details for August
- Daylight
- 12 h 32 min06:51 – 19:23
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 87 %on averageAll months
- Hot days
- 3 days30 °C or moreAll months
- Time zone
- UTC+0Africa/Bissau
How the score comes together
- Temperatureweight 50 %83 %
- Sunshineweight 20 %18 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Bissau in August: quick answers
Is Bissau hot in August?
Yes. In August, Bissau is hot: daytime highs average 28 °C and nights stay around 24 °C. On about 3 days the thermometer climbs to 30 °C or more.
Can you swim in Bissau in August?
Yes. In August the sea averages 27.9 °C – lovely and warm for swimming.
Does it rain much in Bissau in August?
It rains often – on about 29 days, adding up to 467 mm.
Bissau month by month
The whole year in BissauAll destinations: Guinea-BissauWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences