Monthly Climate
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Best time to visit Bissau

January is the best time to visit Bissau for general sightseeing, with average highs of 33 °C and about 0 wet days. The comfortable season runs roughly November to May.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking January comfort 70/100
A beach holiday January sea 25 °C
The least cloud March 28 % average cloud cover
The least rain March 0 mm
Warmth March 35 °C
Cooler weather August 28 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 January 70 33 °C 0 88
2 December 70 33 °C 0 87
3 February 65 34 °C 0 83
4 November 65 32 °C 4 82
5 March 61 35 °C 0 81
6 May 61 33 °C 1 84
7 April 61 34 °C 0 82
8 June 54 32 °C 11 72
9 August 50 28 °C 29 72
10 July 49 29 °C 27 71
11 September 49 29 °C 27 71
12 October 45 30 °C 22 65

For a beach holiday

January scores highest, with a sea temperature of 25 °C and air temperatures around 33 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 25 °C 33 °C 39 % 88
February 25 °C 34 °C 33 % 83
March 26 °C 35 °C 28 % 81
April 27 °C 34 °C 32 % 82
May 28 °C 33 °C 45 % 84
June 28 °C 32 °C 71 % 72
July 28 °C 29 °C 83 % 71
August 28 °C 28 °C 86 % 72
September 28 °C 29 °C 83 % 71
October 29 °C 30 °C 64 % 65
November 29 °C 32 °C 49 % 82
December 27 °C 33 °C 45 % 87

When to think twice

October scores lowest with about 22 wet days and highs near 30 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 32.8 °C under 1 mm 39 %
February 34.2 °C 1 mm 33 %
March 34.9 °C under 1 mm 28 %
April 34.4 °C under 1 mm 32 %
May 33.4 °C 6 mm 45 %
June 31.5 °C 86 mm 71 %
July 28.9 °C 345 mm 83 %
August 28.3 °C 446 mm 86 %
September 29.0 °C 306 mm 83 %
October 30.3 °C 141 mm 64 %
November 31.8 °C 23 mm 49 %
December 32.7 °C 2 mm 45 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.