Bissau
Guinea-Bissau
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Bissau, Guinea-Bissau

Trees along the golden sandy shores of Bijagos Islands in Bissau, Guinea Bissau in West Africa, with ships sailing on the calm waters under clear blue skies
Trees along the golden sandy shores of Bijagos Islands in Bissau, Guinea Bissau in West Africa, with ships sailing on the calm waters under clear blue skies
The best months for a swim in Bissau, Guinea-Bissau, are January, March through May, November and December, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.
January, like December, is a hot winter month in Bissau, Guinea-Bissau, with average temperature ranging between min 17.8°C (64°F) and max 31.1°C (88°F). The ideal sea water temperature of 25.8°C (78.4°F) and 0.5mm (0") of accumulated rainfall make January the best time for swimming and other water activities. Weather in January »

February, the last month of the winter, in Bissau, is another tropical month, with average temperature ranging between min 18.3°C (64.9°F) and max 32.8°C (91°F). In Bissau, the average high-temperature in February is almost the same as in January - a still hot 32.8°C (91°F). Weather in February »

The first month of the spring, March, is still a hot month in Bissau, Guinea-Bissau, with average temperature fluctuating between 19.4°C (66.9°F) and 33.9°C (93°F). The ideal sea water temperature of 25.1°C (77.2°F) and 0.5mm (0") of accumulated rainfall make March the best time for swimming and other water activities. Weather in March »

April, the same as March, in Bissau, Guinea-Bissau, is another tropical spring month, with average temperature fluctuating between 33.3°C (91.9°F) and 20.6°C (69.1°F). The ideal sea water temperature of 25.9°C (78.6°F) and only 1 rainfall days, with 0.8mm (0") of accumulated rainfall, make April the best time for swimming and other water activities. Weather in April »

The last month of the spring, May, is another hot month in Bissau, Guinea-Bissau, with temperature in the range of an average high of 32.8°C (91°F) and an average low of 22.2°C (72°F). The ideal sea water temperature of 26.8°C (80.2°F) and only 3 rainfall days, with 17.3mm (0.7") of accumulated rainfall, make May the best time for swimming and other water activities. Weather in May »

The first month of the summer, June, is also a hot month in Bissau, Guinea-Bissau, with average temperature ranging between min 22.8°C (73°F) and max 31.1°C (88°F). In Bissau, the average high-temperature is practically the same as in May - a still tropical 31.1°C (88°F). Weather in June »

July, the same as June, is a moderately hot summer month in Bissau, Guinea-Bissau, with temperature in the range of an average high of 29.4°C (84.9°F) and an average low of 22.8°C (73°F). The coldest month is July, with an average high-temperature of 29.4°C (84.9°F) and an average low-temperature of 22.8°C (73°F). In Bissau, Guinea-Bissau, during July, the rain falls for 18 days and regularly aggregates up to 472.5mm (18.6") of precipitation. Weather in July »

August, the last month of the summer, in Bissau, is a hot month, with average temperature fluctuating between 30°C (86°F) and 22.8°C (73°F). In August, the average high-temperature is almost the same as in July - a hot 30°C (86°F). Weather in August »

September, the first month of the autumn, in Bissau, is also a hot month, with temperature in the range of an average high of 30°C (86°F) and an average low of 22.8°C (73°F). In September, the average high-temperature remains equal as in August - a still hot 30°C (86°F). Weather in September »

October, like September, is another hot autumn month in Bissau, Guinea-Bissau, with average temperature fluctuating between 31.1°C (88°F) and 22.8°C (73°F). In Bissau, Guinea-Bissau, the average high-temperature in October is relatively the same as in September - a still hot 31.1°C (88°F). Weather in October »

The last month of the autumn, November, is also a hot month in Bissau, Guinea-Bissau, with temperature in the range of an average high of 31.7°C (89.1°F) and an average low of 22.2°C (72°F). The ideal sea water temperature of 28.8°C (83.8°F) and only 2 rainfall days, with 41.4mm (1.6") of accumulated rainfall, make November the best time for swimming and other water activities. Weather in November »

The first month of the winter, December, is also a hot month in Bissau, Guinea-Bissau, with average temperature varying between 18.9°C (66°F) and 30.6°C (87.1°F). The ideal sea water temperature of 27.2°C (81°F) and only 1 rainfall days, with 2mm (0.1") of accumulated rainfall, make December the best time for swimming and other water activities. Weather in December »

How much does it rain in Bissau?

During the entire year, Bissau aggregates up to 2022.8mm (79.6") of precipitation.

What is the driest month in Bissau?

Months with the least rainfall in Bissau, Guinea-Bissau, are January and March with 0.5mm (0") of accumulated rain.

What is the month with the coldest sea water in Bissau?

February is the month with the coldest seawater in Bissau, with an average sea temperature of 24.8°C (76.6°F).

When is the highest UV index in Bissau?

Months with the highest UV index in Bissau, Guinea-Bissau, are February through September, with an average maximum UV index of 12.

What is the warmest month in Bissau?

With an average high-temperature of 33.9°C (93°F) and an average low-temperature of 19.4°C (66.9°F), March is the warmest month.

What is the month with the most sunshine in Bissau?

Months with the most sunshine are March and April, with an average of 9h of sunshine.

When are the longest days in Bissau?

The month with the longest days is June, with an average of 12.8h of daylight.

What is the coldest month in Bissau?

The coldest month is July, with an average high-temperature of 29.4°C (84.9°F) and an average low-temperature of 22.8°C (73°F).

What is the wettest month in Bissau?

August is the month with the most rainfall in Bissau, Guinea-Bissau. Rain falls for 22 days and accumulates 682.5mm (26.9") of precipitation.

What is the month with the least sunshine in Bissau?

August has the least sunshine of the year in Bissau, with an average of 5h of sunshine.

What months are the sea warmest in Bissau?

October and November, with an average sea temperature of 28.8°C (83.8°F), are months with the warmest seawater in Bissau.

What is the month with the shortest days in Bissau?

With an average of 11.4h of daylight, December has the shortest days of the year.

What is the month with the lowest UV index in Bissau?

With an average maximum UV index of 9, December is the month with the lowest UV index.
Average temperature - Bissau, Guinea-Bissau

The warmest month (with the highest average high temperature) is March (33.9°C).
The month with the lowest average high temperature is July (29.4°C).

Months with the highest average low temperature are June, July, August, September and October (22.8°C).
The coldest month (with the lowest average low temperature) is January (17.8°C).

Average rainfall - Bissau, Guinea-Bissau

The wettest month (with the highest rainfall) is August (682.5mm).
Driest months (with the lowest rainfall) are January and March (0.5mm).

Average rainfall days - Bissau, Guinea-Bissau

The month with the highest number of rainy days is August (22 days).
Months with the lowest number of rainy days are January, February and March (0 days).

Average sea temperature - Bissau, Guinea-Bissau

Best months for swimming (with the highest average sea temperature) are October and November (28.8°C).
The coldest month (with the lowest average sea temperature) is February (24.8°C).

Average daylight / Average sunshine - Bissau, Guinea-Bissau
Average UV index - Bissau, Guinea-Bissau

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).