thumb|457x457px|A map of Guinea Bissau	 thumb|Location of Guinea Bissau
The geography of Guinea-Bissau is that of low coastal plains bordering the Atlantic Ocean.
The country borders Senegal in the north and Guinea in the southeast.
Terrain and ecology
thumb|350px|Guinea-Bissau's topography.
The terrain of Guinea-Bissau is mostly low coastal plain with swamps of Guinean mangroves rising to Guinean forest-savanna mosaic in the east.
A recent global remote sensing analysis suggested that there were 1,203km² of tidal flats in Guinea-Bissau, making it the 28th ranked country in terms of tidal flat area.
The lowest point on Guinea-Bissau is at sea level at the Atlantic Ocean.
The highest point on Guinea-Bissau is 300 metres above sea level at an unnamed location in the eastern part of the country.
Natural resources found in Guinea-Bissau include fish, timber, phosphates, bauxite, clay, granite, limestone and unexploited deposits of petroleum.
10.67% of the land is arable and 235.6 square kilometres is irrigated.
Natural hazards include a hot, dry, dusty harmattan haze that may reduce visibility during the dry season and brush fires.
Severe environmental issues include deforestation; soil erosion; overgrazing and overfishing.
Near the Senegal border there have been historic sightings of the painted hunting dog, Lycaon pictus, but that endangered canid may now be extirpated in that locale.C. Michael Hogan.
2009.
Painted Hunting Dog: Lycaon pictus, GlobalTwitcher.com, ed.
N. Stromberg Climate
Guinea-Bissau's climate is tropical.
This means it is generally hot and humid.
It has a monsoonal-type rainy season (June to November) with southwesterly winds and a dry season (December to May) with northeasterly harmattan winds.U.S. Central Intelligence Agency.
World Factbook
Guinea-Bissau is warm all year around and there is little temperature fluctuation; it averages .
The average rainfall for the capital city Bissau is  although this is almost entirely accounted for during the rainy season which falls between June and September/October.
From December through April, the country receives very little rainfall.
centre|600px Bissagos Islands
Information from the CIA World Factbook
thumb|300px|Typical scenery in Guinea-Bissau.
; Location
Western Africa, bordering the North Atlantic Ocean, between Guinea and Senegal
; Geographic coordinates
; Map references ; Area:
Total: 36,125 km2
Land: 28,120 km2
Water: 8,005 km2
; Area—comparative
Slightly less than three times the size of Connecticut
; Land boundaries ;* Total: 762 km ;* Border countries: Guinea 421 km, Senegal 341 km ; Coastline
350 km
; Maritime claims ;* Territorial sea:  ;* Exclusive economic zone:  ; Terrain
Mostly low coastal plain rising to savanna in east
; Elevation extremes:
Lowest point: Atlantic Ocean 0 m
Highest point: Unnamed location in the northeast corner of the country 300 m
; Natural resources
Fish, timber, phosphates, bauxite, unexploited deposits of petroleum
; Land use:
Arable land: 10.67%
Permanent crops: 8.89%
Other: 80.44% (2012 est.)
; Irrigated land
223.6 km2 (2003)
; Total renewable water resources
31 km3
; Freshwater withdrawal (domestic/industrial/agricultural):
Total: 0.18 km3/yr (18%/6%/76%)
Per capita: 135.7 m3/yr (2005)
; Natural hazards
Hot, dry, dusty harmattan haze may reduce visibility during dry season; brush fires
; Environment—current issues:
Deforestation; soil erosion; overgrazing; overfishing
; Environment—international agreements:
Party to: Biodiversity, Climate Change, Desertification, Endangered Species, Hazardous Wastes, Law of the Sea, Ozone Layer Protection, Wetlands
Signed, but not ratified: None of the selected agreements
Extreme points
This is a list of the extreme points of Guinea-Bissau, the points that are farther north, south, east or west than any other location.
Northernmost point – the northern section of the border with Senegal*
Easternmost point – unnamed location on the border with Guinea immediately south-west of the Guinean village of Sofan, Gabú Region
Southernmost point – unnamed headland on Ilha Cataque, Tombali Region
Westernmost point -  Cape Roxo at the point where the border with Senegal enters the Atlantic Ocean, Cacheu Region
*Note: Guinea-Bissau does not have a northernmost point, the border here being formed by a straight horizontal line
See also
Guinea-Bissau
Line notes
References
C. Michael Hogan.
2009.
Painted Hunting Dog: Lycaon pictus, GlobalTwitcher.com, ed. N. Stromberg
U.S. Central Intelligence Agency.
