Weather in Guinea-Bissau - today, tomorrow and 14-day forecast

Right now temperatures across Guinea-Bissau range from 29° to 29°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.

Country values are the median of forecasts from 1 cities; the range shows local differences. Methodology.

Next days in Guinea-Bissau

today🌧️ 29°💧 1.1 mm

Sun☁️ 29°💧 0.5 mm

Mon🌧️ 29°💧 33.4 mm

Tue🌧️ 28°💧 14.3 mm

Wed🌧️ 29°💧 1.7 mm

Thu🌧️ 29°💧 2.2 mm

Fri🌧️ 30°💧 1.8 mm

Sat🌧️ 30°💧 2.2 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Saturday 5 Sept in Guinea-Bissau, the forecast high is 29°C. Typical daytime temperatures at this time of year range from 28°C to 29°C, so it will be warmer than usual. It is warmer than 82% of similar days.

Saturday 5 Sept

29°Cwarmer than usual

usually 28°C–29°C

warmer than 82% of similar days

night: exceptionally warm rain: exceptionally dry wind: stronger than usual

Sunday 6 Sept

29°Cnear normal

usually 28°C–29°C

night: exceptionally warm rain: exceptionally dry wind: stronger than usual

Monday 7 Sept

29°Cwarmer than usual

usually 28°C–30°C

warmer than 80% of similar days

night: exceptionally warm rain: exceptionally wet wind: typical

Tuesday 8 Sept

28°Cnear normal

usually 28°C–30°C

night: exceptionally warm rain: more rain than usual wind: stronger than usual

Wednesday 9 Sept

29°Cnear normal

usually 28°C–30°C

night: exceptionally warm rain: exceptionally dry wind: lighter than usual

Thursday 10 Sept

29°Cnear normal

usually 28°C–30°C

night: exceptionally warm rain: exceptionally dry wind: typical

Friday 11 Sept

30°Cwarmer than usual

usually 28°C–30°C

warmer than 80% of similar days

night: exceptionally warm rain: exceptionally dry wind: stronger than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 29°C by day. The coolest year was 2010 (28°C) and the warmest was 1987 (30°C). The current forecast averages 29°C - higher than in 87% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Guinea-Bissau

Guinea-Bissau - 14-day weather forecast infographic

Guinea-Bissau 30 & 45-day weather - long-range outlook

Next 16 days · forecast

29°

around 26° at night · days with rain: 15

Weeks 3-4 · avg for September

31°

around 24° at night · rain chance 54%

Weeks 5-7 · avg for October

32°

around 25° at night · rain chance 29%

The 30 & 45-day outlook for Guinea-Bissau: the next 16 days are a numerical forecast updated daily - on average 29° by day and 26° at night. Further out we rely on multi-year climate averages: around 31° in September, and about 32° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Guinea-Bissau

Saturday5 September 2026

🌧️29°light rain

night 27° · evening 28° · rain 1.13 mm · humidity 72% · wind 6 m/s · clouds 93%

Sunday6 September 2026

☁️29°overcast clouds

night 27° · evening 27° · rain 0.48 mm · humidity 75% · wind 6 m/s · clouds 96%

Monday7 September 2026

🌧️29°heavy rain

night 25° · evening 25° · rain 33.37 mm · humidity 72% · wind 4 m/s · clouds 68%

Tuesday8 September 2026

🌧️28°moderate rain

night 25° · evening 26° · rain 14.29 mm · humidity 72% · wind 6 m/s · clouds 96%

Wednesday9 September 2026

🌧️29°light rain

night 27° · evening 29° · rain 1.68 mm · humidity 69% · wind 3 m/s · clouds 95%

Thursday10 September 2026

🌧️29°light rain

night 27° · evening 28° · rain 2.24 mm · humidity 76% · wind 4 m/s · clouds 28%

Friday11 September 2026

🌧️30°light rain

night 27° · evening 29° · rain 1.78 mm · humidity 72% · wind 5 m/s · clouds 80%

Saturday12 September 2026

🌧️30°light rain

night 27° · evening 29° · rain 2.2 mm · humidity 72% · wind 5 m/s · clouds 77%

Sunday13 September 2026

🌧️30°light rain

night 27° · evening 28° · rain 1.48 mm · humidity 70% · wind 5 m/s · clouds 90%

Monday14 September 2026

🌧️29°moderate rain

night 25° · evening 25° · rain 18.85 mm · humidity 75% · wind 5 m/s · clouds 99%

Tuesday15 September 2026

🌧️25°light rain

night 25° · evening 26° · rain 13.46 mm · humidity 90% · wind 6 m/s · clouds 100%

Wednesday16 September 2026

🌧️28°light rain

night 26° · evening 27° · rain 5.08 mm · humidity 75% · wind 5 m/s · clouds 85%

Thursday17 September 2026

🌧️29°moderate rain

night 27° · evening 28° · rain 18.65 mm · humidity 73% · wind 4 m/s · clouds 93%

Friday18 September 2026

🌧️29°light rain

night 26° · evening 28° · rain 2.44 mm · humidity 72% · wind 5 m/s · clouds 83%

Saturday19 September 2026

🌧️30°moderate rain

night 27° · evening 27° · rain 9.63 mm · humidity 72% · wind 3 m/s · clouds 78%

Sunday20 September 2026

🌧️29°light rain

night 28° · evening 28° · rain 3.13 mm · humidity 72% · wind 4 m/s · clouds 93%

Sea temperature - Guinea-Bissau

Beach	Water today	Water week avg	Waves	How's the water?
Bissau	31℃	31℃	0.1 m	very warm

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Guinea-Bissau weather through the year

Guinea-Bissau weather month by month - when is the best time to go?

January (32°)February (34°)March (34°)April (34°)May (34°)June (32°)July (31°)August (30°)September (31°)October (32°)November (32°)December (31°)

Weather in other countries in Africa

KenyaThe GambiaLesothoEthiopiaLiberiaEritrea

FAQ - Guinea-Bissau weather

What is the weather like in Guinea-Bissau today?

Today it is about 29° during the day and 27° at night, light rain.

How far ahead can I check the forecast for Guinea-Bissau?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.