Climate guideThirty-year normals for Bissau
Bissau climate by month
Tropical savanna · AwBest Jan–Feb · Dec
Annual mean27°day and night
Seasonal swing2°warmest vs coolest
Precipitation1,606 mm144 wet days a year
11.86° N, 15.60° WElevation 13 mUTC+0 · Greenwich Mean Time
When to goBissau · weather score
Best timeJan–Feb · Dec
October: high / low30° / 25°
iSummary
What the weather is like
Bissau has a tropical savanna climate (Köppen Aw): .
The warmest month is March, when afternoons average 34° and nights 22°. August is the coolest month, with highs of 28° and lows of 24°. The difference between the warmest and the coolest month is about 2°, a small seasonal swing typical of places tempered by the sea.
About 1,606 mm of precipitation falls in an average year. August is the wettest month (493 mm, 31 wet days) and January the driest (0 mm, 0 wet days). Cloud cover ranges from 15% in March to 60% in August.
The sea reaches about 29° in November. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Year in figures
- Hottest afternoons
- 34° · March
- Coldest nights
- 20° · January
- Wettest month
- August
- Driest month
- January
- Clearest skies
- March · 15% cloud
- Warmest sea
- 29° · November
- Longest day
- 12 h 49 min
- Shortest day
- 11 h 26 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 32° | 33° | 34° | 34° | 33° | 31° | 29° | 28° | 29° | 30° | 32° | 32° |
| Average low | 20° | 21° | 22° | 23° | 24° | 25° | 24° | 24° | 24° | 25° | 24° | 22° |
| Precipitation | 0 mm | 0 mm | 0 mm | 0 mm | 15 mm | 155 mm | 389 mm | 493 mm | 376 mm | 168 mm | 10 mm | 0 mm |
| Wet days (≥1 mm) | 0 | 0 | 0.2 | 0 | 4.3 | 21.8 | 30.7 | 30.8 | 29.8 | 22.8 | 2.8 | 0.3 |
| Cloud cover | 24% | 21% | 15% | 17% | 28% | 48% | 58% | 60% | 56% | 40% | 30% | 31% |
| Sea temperature | 25° | 25° | 26° | 27° | 28° | 28° | 28° | 28° | 28° | 29° | 29° | 27° |
| Daylight | 11h 30 | 11h 45 | 12h 03 | 12h 23 | 12h 40 | 12h 49 | 12h 45 | 12h 31 | 12h 12 | 11h 53 | 11h 35 | 11h 26 |
| Month score | 72 | 66 | 62 | 64 | 58 | 35 | 40 | 41 | 40 | 42 | 66 | 70 |
ivMonth by month
Bissau in every month
January72
32° / 20°
0 mm · 0 wet days
February66
33° / 21°
0 mm · 0 wet days
March62
34° / 22°
0 mm · 0.2 wet days
April64
34° / 23°
0 mm · 0 wet days
May58
33° / 24°
15 mm · 4.3 wet days
June35
31° / 25°
155 mm · 21.8 wet days
July40
29° / 24°
389 mm · 30.7 wet days
August41
28° / 24°
493 mm · 30.8 wet days
September40
29° / 24°
376 mm · 29.8 wet days
October42
30° / 25°
168 mm · 22.8 wet days
November66
32° / 24°
10 mm · 2.8 wet days
December70
32° / 22°
0 mm · 0.3 wet days