Geography and climate 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 beyond the city.
Geography and climate thumb|380px|center|View of downtow,n 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 beyond the city.