View source for Bissau

==Geography and climate==
[[File:DC - Foto Serra No 142 - Vista aérea parcial e Ilhéu do Rei - Bissau.jpg|thumb|380px|center|View of downtown Bissau in the 1960s as the capital of Portuguese Guinea]]
Bissau is located on the [[Geba River]] estuary, off the Atlantic Ocean. The land surrounding the city is extremely low-lying, and the river is accessible to ocean-going vessels despite its modest discharge for about {{convert|80|km|mi}} beyond the city.

Bissau has a [[tropical savanna climate]] ([[Köppen climate classification|Köppen]] ''Aw''), not quite wet enough to qualify as a [[tropical monsoon climate]] (''Am'') but much wetter than most climates of its type.

Almost no rain falls from November to May, but during the remaining five months of the year, the city receives around {{convert|2000|mm|in}} of rain.
{{Weather box|width = auto
|location = Bissau ([[Osvaldo Vieira International Airport]]) 1991–2020
|metric first = yes
|single line = yes
|Jan high C = 32.4
|Feb high C = 35.2
|Mar high C = 36.0
|Apr high C = 35.3
|May high C = 34.8
|Jun high C = 33.0
|Jul high C = 31.1
|Aug high C = 30.4
|Sep high C = 31.3
|Oct high C = 32.3
|Nov high C = 32.8
|Dec high C = 32.6
|year high C = 33.1
|Jan mean C = 25.3
|Feb mean C = 27.1
|Mar mean C = 28.2
|Apr mean C = 28.0
|May mean C = 28.5
|Jun mean C = 28.1
|Jul mean C = 27.2
|Aug mean C = 26.9
|Sep mean C = 27.3
|Oct mean C = 27.9
|Nov mean C = 27.7
|Dec mean C = 26.0
|year mean C = 27.4
|Jan low C = 18.3
|Feb low C = 19.0
|Mar low C = 20.4
|Apr low C = 20.6
|May low C = 22.2
|Jun low C = 23.1
|Jul low C = 23.2
|Aug low C = 23.3
|Sep low C = 23.2
|Oct low C = 23.5
|Nov low C = 22.5
|Dec low C = 19.4
|year low C = 21.1
|Jan precipitation mm = 0.1
|Feb precipitation mm = 0.0
|Mar precipitation mm = 0.0
|Apr precipitation mm = 0.0
|May precipitation mm = 10.6
|Jun precipitation mm = 139.9
|Jul precipitation mm = 371.0
|Aug precipitation mm = 467.7
|Sep precipitation mm = 364.4
|Oct precipitation mm = 166.7
|Nov precipitation mm = 10.9
|Dec precipitation mm = 0.2
|precipitation colour = green
|unit precipitation days = 1.0 mm
|Jan precipitation days = 0
|Feb precipitation days = 0
|Mar precipitation days = 0
|Apr precipitation days = 0
|May precipitation days = 1.4
|Jun precipitation days = 12.2
|Jul precipitation days = 21.5
|Aug precipitation days = 24.1
|Sep precipitation days = 21.7
|Oct precipitation days = 15.7
|Nov precipitation days = 3.1
|Dec precipitation days = 0
|year precipitation days = 
|source 1 =NOAA<ref name="WMONormals">{{cite web |url=https://www.ncei.noaa.gov/data/oceans/archive/arc0216/0253808/4.4/data/0-data/Region-1-WMO-Normals-9120/GuineaBissau/CSV/BISSAUAEROPORTO_61766.csv |title=World Meteorological Organization Climate Normals for 1991-2020 — Conakry |publisher=National Oceanic and Atmospheric Administration |access-date=4 January 2024 }}</ref>}}
{{Weather box|width = auto
|location = Bissau, Guinea-Bissau (1974–1994)
|collapsed = yes
|metric first = yes
|single line = yes
|Jan record high C = 36.7
|Feb record high C = 38.3
|Mar record high C = 38.9
|Apr record high C = 41.1
|May record high C = 39.4
|Jun record high C = 35.6
|Jul record high C = 33.3
|Aug record high C = 32.8
|Sep record high C = 33.9
|Oct record high C = 34.4
|Nov record high C = 35.0
|Dec record high C = 35.6
|year record high C = 41.1
|Jan high C = 31.1
|Feb high C = 32.8
|Mar high C = 33.9
|Apr high C = 33.3
|May high C = 32.8
|Jun high C = 31.1
|Jul high C = 29.4
|Aug high C = 30.0
|Sep high C = 30.0
|Oct high C = 31.1
|Nov high C = 31.7
|Dec high C = 30.6
|year high C = 31.5
|Jan mean C = 24.4
|Feb mean C = 25.6
|Mar mean C = 26.6
|Apr mean C = 27.0
|May mean C = 27.5
|Jun mean C = 26.9
|Jul mean C = 26.1
|Aug mean C = 26.4
|Sep mean C = 26.4
|Oct mean C = 27.0
|Nov mean C = 26.9
|Dec mean C = 24.8
|year mean C = 26.3
|Jan low C = 17.8
|Feb low C = 18.3
|Mar low C = 19.4
|Apr low C = 20.6
|May low C = 22.2
|Jun low C = 22.8
|Jul low C = 22.8
|Aug low C = 22.8
|Sep low C = 22.8
|Oct low C = 22.8
|Nov low C = 22.2
|Dec low C = 18.9
|year low C = 21.1
|Jan record low C = 12.2
|Feb record low C = 13.3
|Mar record low C = 15.6
|Apr record low C = 16.7
|May record low C = 17.2
|Jun record low C = 19.4
|Jul record low C = 19.4
|Aug record low C = 19.4
|Sep record low C = 19.4
|Oct record low C = 20.0
|Nov record low C = 15.0
|Dec record low C = 12.8
|year record low C = 12.2
|Jan rain mm = 0.5
|Feb rain mm = 0.8
|Mar rain mm = 0.5
|Apr rain mm = 0.8
|May rain mm = 17.3
|Jun rain mm = 174.8
|Jul rain mm = 472.5
|Aug rain mm = 682.5
|Sep rain mm = 434.9
|Oct rain mm = 194.8
|Nov rain mm = 41.4
|Dec rain mm = 2.0
|rain colour = green
|Jan sun = 248
|Feb sun = 226
|Mar sun = 279
|Apr sun = 270
|May sun = 248
|Jun sun = 210
|Jul sun = 186
|Aug sun = 155
|Sep sun = 180
|Oct sun = 217
|Nov sun = 240
|Dec sun = 248
|source 1 = Sistema de Clasificación Bioclimática Mundial<ref>{{cite web |url=http://www.ucm.es/info/cif/station/gu-bissa.htm |title=GUINEA-BISSAU - BISSAU |access-date=4 October 2011 |publisher=Centro de Investigaciones Fitosociológicas |archive-date=7 August 2007 |archive-url=https://web.archive.org/web/20070807092004/http://www.ucm.es/info/cif/station/gu-bissa.htm |url-status=live }}</ref>
|source 2 = World Climate Guides (sunshine only)<ref>{{cite web |url=http://www.ucm.es/info/cif/station/gu-bissa.htm |title=Bissau Climate Guide |access-date=4 October 2011 |publisher=Centro de Investigaciones Fitosociológicas |archive-date=7 August 2007 |archive-url=https://web.archive.org/web/20070807092004/http://www.ucm.es/info/cif/station/gu-bissa.htm |url-status=live }}</ref>
|date=August 2010
}}