Bissau weather in May
In May, Bissau sees average daytime highs of 33°C and overnight lows near 25°C, with 6 mm of rain across 1.3 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 50% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 12 h 24 min at the start of May to 12 h 36 min by month's end. Set against the rest of the year, May is Bissau's 5th-clearest and 1st-windiest month. For the whole year in context, see Bissau's year-round climate.
- Daytime high
- 33°
- 4th warmest
- Overnight low
- 25°
- 10th coldest
- Rainfall
- 6 mm
- 1.3 wet days
- Daylight
- 12 h 30 min
- 6:42 AM – 7:15 PM
- Cloud cover
- 43%
- 5th clearest
- Wind
- 12 km/h
- 1st windiest
- Solar energy
- 6.69 kWh/m²
- Travel score
- 4.1
- out of 10
Bissau is capital city of Guinea-Bissau.
- Density
- 5,674/km²
- people per km²
- Founded
- 1687
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Day-to-day highs hold fairly steady near 33°C through the month.
A typical May day in Bissau reaches about 33°C in the afternoon and slips back to 25°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, May runs about 1°C cooler than April and about 2°C warmer than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 34 | 24 |
| 2 | 34 | 24 |
| 3 | 34 | 24 |
| 4 | 34 | 24 |
| 5 | 34 | 24 |
| 6 | 34 | 24 |
| 7 | 34 | 24 |
| 8 | 34 | 24 |
| 9 | 34 | 25 |
| 10 | 34 | 25 |
| 11 | 34 | 25 |
| 12 | 34 | 25 |
| 13 | 34 | 25 |
| 14 | 34 | 25 |
| 15 | 33 | 25 |
| 16 | 33 | 25 |
| 17 | 33 | 25 |
| 18 | 33 | 25 |
| 19 | 33 | 25 |
| 20 | 33 | 25 |
| 21 | 33 | 25 |
| 22 | 33 | 25 |
| 23 | 33 | 25 |
| 24 | 33 | 25 |
| 25 | 33 | 25 |
| 26 | 33 | 25 |
| 27 | 33 | 25 |
| 28 | 33 | 25 |
| 29 | 33 | 25 |
| 30 | 33 | 26 |
| 31 | 33 | 26 |
How May really feels in Bissau
Once humidity and wind are folded in, May averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Bissau weather by month
How May compares with the rest of the year at a glance. May is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 21° | 0 | 0.1 | 11.4 | 4.4 |
| Feb | 34° / 22° | 1 | 0.1 | 11.6 | 3.6 |
| Mar | 35° / 23° | 0 | 0 | 11.9 | 3.3 |
| Apr | 35° / 24° | 0 | 0 | 12.3 | 3.6 |
| May | 33° / 25° | 6 | 1.3 | 12.5 | 4.1 |
| Jun | 32° / 26° | 87 | 12 | 12.7 | 3.8 |
| Jul | 30° / 25° | 352 | 27.8 | 12.6 | 3.0 |
| Aug | 29° / 25° | 452 | 29.3 | 12.4 | 2.9 |
| Sep | 30° / 25° | 307 | 27.7 | 12.1 | 2.8 |
| Oct | 31° / 25° | 142 | 22 | 11.7 | 3.2 |
| Nov | 33° / 24° | 23 | 4.6 | 11.5 | 4.2 |
| Dec | 33° / 22° | 2 | 0.3 | 11.3 | 4.4 |
Cloud cover in May
The sky is clear or mostly clear about 50% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 76 | 75 | 74 | 74 | 72 | 70 | 69 | 68 | 67 | 66 | 64 | 63 | 62 | 61 | 59 | 59 | 57 | 56 | 54 | 53 | 51 | 49 | 48 |
| Cloudier (%) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 25 | 26 | 26 | 28 | 30 | 31 | 32 | 33 | 34 | 36 | 37 | 38 | 39 | 41 | 41 | 43 | 44 | 46 | 47 | 49 | 51 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 77 | 23 |
| 2 | 77 | 23 |
| 3 | 77 | 23 |
| 4 | 77 | 23 |
| 5 | 77 | 23 |
| 6 | 77 | 23 |
| 7 | 77 | 23 |
| 8 | 76 | 24 |
| 9 | 76 | 24 |
| 10 | 75 | 25 |
| 11 | 74 | 26 |
| 12 | 74 | 26 |
| 13 | 72 | 28 |
| 14 | 70 | 30 |
| 15 | 69 | 31 |
| 16 | 68 | 32 |
| 17 | 67 | 33 |
| 18 | 66 | 34 |
| 19 | 64 | 36 |
| 20 | 63 | 37 |
| 21 | 62 | 38 |
| 22 | 61 | 39 |
| 23 | 59 | 41 |
| 24 | 59 | 41 |
| 25 | 57 | 43 |
| 26 | 56 | 44 |
| 27 | 54 | 46 |
| 28 | 53 | 47 |
| 29 | 51 | 49 |
| 30 | 49 | 51 |
| 31 | 48 | 52 |
Chance of precipitation in May
Bissau gets around 6 mm of rain over 1.3 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 5% and peaks near 14% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 2 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 3 |
| 14 | 3 |
| 15 | 3 |
| 16 | 4 |
| 17 | 4 |
| 18 | 5 |
| 19 | 5 |
| 20 | 5 |
| 21 | 6 |
| 22 | 7 |
| 23 | 7 |
| 24 | 8 |
| 25 | 8 |
| 26 | 9 |
| 27 | 10 |
| 28 | 11 |
| 29 | 12 |
| 30 | 13 |
| 31 | 14 |
Humidity in May
Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the oppressive band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 57 | 57 | 57 | 55 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 47 | 46 | 45 | 43 | 42 | 40 | 39 | 37 | 36 | 34 | 32 | 30 | 28 | 26 | 25 | 23 | 21 | 20 | 18 | 16 |
| Oppressive (%) | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 44 | 45 | 46 | 48 | 49 | 51 | 51 | 54 | 54 | 56 | 57 | 58 | 60 | 61 | 63 | 64 | 64 | 65 | 66 | 66 | 66 | 67 |
| Miserable (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 16 | 17 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 9 | 57 | 34 | 0 |
| 2 | 8 | 57 | 35 | 0 |
| 3 | 7 | 57 | 36 | 0 |
| 4 | 7 | 55 | 37 | 1 |
| 5 | 6 | 55 | 38 | 1 |
| 6 | 6 | 54 | 39 | 1 |
| 7 | 6 | 53 | 40 | 1 |
| 8 | 5 | 52 | 41 | 2 |
| 9 | 5 | 51 | 42 | 2 |
| 10 | 4 | 50 | 44 | 2 |
| 11 | 4 | 49 | 45 | 3 |
| 12 | 3 | 47 | 46 | 3 |
| 13 | 3 | 46 | 48 | 3 |
| 14 | 2 | 45 | 49 | 4 |
| 15 | 2 | 43 | 51 | 4 |
| 16 | 2 | 42 | 51 | 5 |
| 17 | 1 | 40 | 54 | 5 |
| 18 | 1 | 39 | 54 | 6 |
| 19 | 1 | 37 | 56 | 6 |
| 20 | 1 | 36 | 57 | 6 |
| 21 | 1 | 34 | 58 | 7 |
| 22 | 1 | 32 | 60 | 7 |
| 23 | 1 | 30 | 61 | 8 |
| 24 | 0 | 28 | 63 | 9 |
| 25 | 0 | 26 | 64 | 10 |
| 26 | 0 | 25 | 64 | 11 |
| 27 | 0 | 23 | 65 | 12 |
| 28 | 0 | 21 | 66 | 13 |
| 29 | 0 | 20 | 66 | 14 |
| 30 | 0 | 18 | 66 | 16 |
| 31 | 0 | 16 | 67 | 17 |
Wind in May
Winds average 12 km/h in May, the windiest month of the year.
Across May, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 12 | light breeze |
| 14 | 12 | light breeze |
| 15 | 12 | light breeze |
| 16 | 12 | light breeze |
| 17 | 12 | light breeze |
| 18 | 12 | light breeze |
| 19 | 12 | light breeze |
| 20 | 12 | light breeze |
| 21 | 12 | light breeze |
| 22 | 12 | light breeze |
| 23 | 12 | light breeze |
| 24 | 12 | light breeze |
| 25 | 12 | light breeze |
| 26 | 12 | light breeze |
| 27 | 12 | light breeze |
| 28 | 12 | light breeze |
| 29 | 12 | light breeze |
| 30 | 12 | calm |
| 31 | 12 | calm |
Sunrise & sunset in May
Daylight runs from about 12 h 24 min at the start of May to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over May. Sunrise moves from 6:47 AM to 6:41 AM, and sunset from 7:12 PM to 7:19 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 |
| Sunrise (AM) | 6:47 | 6:47 | 6:46 | 6:46 | 6:46 | 6:45 | 6:45 | 6:44 | 6:44 | 6:44 | 6:44 | 6:43 | 6:43 | 6:43 | 6:43 | 6:42 | 6:42 | 6:42 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 | 6:41 |
| Sunset (PM) | 7:12 | 7:12 | 7:12 | 7:13 | 7:13 | 7:13 | 7:13 | 7:13 | 7:13 | 7:14 | 7:14 | 7:14 | 7:14 | 7:15 | 7:15 | 7:15 | 7:15 | 7:15 | 7:16 | 7:16 | 7:16 | 7:16 | 7:17 | 7:17 | 7:17 | 7:18 | 7:18 | 7:18 | 7:18 | 7:19 | 7:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 6:47 | 7:12 |
| 2 | 12.4 | 6:47 | 7:12 |
| 3 | 12.4 | 6:46 | 7:12 |
| 4 | 12.4 | 6:46 | 7:13 |
| 5 | 12.5 | 6:46 | 7:13 |
| 6 | 12.5 | 6:45 | 7:13 |
| 7 | 12.5 | 6:45 | 7:13 |
| 8 | 12.5 | 6:44 | 7:13 |
| 9 | 12.5 | 6:44 | 7:13 |
| 10 | 12.5 | 6:44 | 7:14 |
| 11 | 12.5 | 6:44 | 7:14 |
| 12 | 12.5 | 6:43 | 7:14 |
| 13 | 12.5 | 6:43 | 7:14 |
| 14 | 12.5 | 6:43 | 7:15 |
| 15 | 12.5 | 6:43 | 7:15 |
| 16 | 12.5 | 6:42 | 7:15 |
| 17 | 12.6 | 6:42 | 7:15 |
| 18 | 12.6 | 6:42 | 7:15 |
| 19 | 12.6 | 6:42 | 7:16 |
| 20 | 12.6 | 6:42 | 7:16 |
| 21 | 12.6 | 6:41 | 7:16 |
| 22 | 12.6 | 6:41 | 7:16 |
| 23 | 12.6 | 6:41 | 7:17 |
| 24 | 12.6 | 6:41 | 7:17 |
| 25 | 12.6 | 6:41 | 7:17 |
| 26 | 12.6 | 6:41 | 7:18 |
| 27 | 12.6 | 6:41 | 7:18 |
| 28 | 12.6 | 6:41 | 7:18 |
| 29 | 12.6 | 6:41 | 7:18 |
| 30 | 12.6 | 6:41 | 7:19 |
| 31 | 12.6 | 6:41 | 7:19 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.69 kWh/m².
For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 7.03 kWh/m² in April across the year — May's 6.69 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 6.9 | 6.9 | 6.9 | 6.9 | 6.8 | 6.8 | 6.8 | 6.8 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.0 | Intense |
| 2 | 7.0 | Intense |
| 3 | 7.0 | Intense |
| 4 | 7.0 | Intense |
| 5 | 7.0 | Intense |
| 6 | 6.9 | Intense |
| 7 | 6.9 | Intense |
| 8 | 6.9 | Intense |
| 9 | 6.9 | Intense |
| 10 | 6.8 | Intense |
| 11 | 6.8 | Intense |
| 12 | 6.8 | Intense |
| 13 | 6.8 | Intense |
| 14 | 6.7 | Intense |
| 15 | 6.7 | Intense |
| 16 | 6.7 | Intense |
| 17 | 6.7 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.4 | Intense |
| 26 | 6.3 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.2 | Intense |
| 30 | 6.2 | Intense |
| 31 | 6.1 | Intense |
Hazard calendar for Bissau
In May, Bissau sits inside its dust season. The full year is below, with each hazard's peak months called out.
Bissau sits in the Atlantic hurricane belt; the season peaks August–October.
Bissau's monsoon runs July–September, when most of the year's rain falls.
Bissau sees seasonal dust haze (February–June), heaviest in June.
Is May a good time to visit Bissau?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Bissau for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Bissau in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Bissau sees daytime highs around 33°C and nights near 25°C. Pack light clothes and sun protection.
Sea temperature near Bissau in May
The nearest coast averages about 28°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 27 km away) is warmest in November at about 29°C and coldest in February near 25°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 25 | 26 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Warm | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 26 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Tropical |
| Jul | 28 | Tropical |
| Aug | 28 | Warm |
| Sep | 28 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 27 | Warm |
UV index in Bissau in May
Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bissau peaks around August 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 7 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 11 | 13 | 11 | 11 | 12 | 12 | 13 | 12 | 11 | 9 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 7 | Very high |
Air quality in Bissau in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Bissau is worst in February — around 86 µg/m³ PM2.5 (unhealthy), about 5.5× the cleanest month (August, 16 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 63 | 86 | 76 | 51 | 53 | 50 | 24 | 16 | 18 | 35 | 45 | 58 |
| Level | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Poor | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 63 | Unhealthy |
| Feb | 86 | Unhealthy |
| Mar | 76 | Unhealthy |
| Apr | 51 | Poor |
| May | 53 | Poor |
| Jun | 50 | Poor |
| Jul | 24 | Moderate |
| Aug | 16 | Moderate |
| Sep | 18 | Moderate |
| Oct | 35 | Moderate |
| Nov | 45 | Poor |
| Dec | 58 | Unhealthy |
Where is Bissau?
Bissau sits at 11.9°N, 15.6°W, 13 m above sea level, in Guinea-Bissau. The nearest listed city is Sintra-Nema, 0.0 km away.
Topography around Bissau
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bissau.
Within 3 km, the terrain around Bissau has only modest variations in elevation — a maximum elevation change of 43 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 48 m; within 80 km, only modest variations in elevation — a maximum elevation change of 61 m.
The land around Bissau is covered by artificial surfaces (63%) within 3 km, water (43%) within 16 km, and trees (41%) and water (32%) within 80 km.
Guinea-Bissau travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type C / E / F
- 220 V · 50 Hz
- Prices
- ≈ 34% of US
- price level, 2025
- GDP per capita
- $1,124
- 2025
- Safe drinking water
- 24%
- of population, 2024
- Homicide rate
- 1.1
- per 100k, 2017
- Road deaths
- 32.2
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bissau (11.8636°, -15.5977°, elevation 13 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).