Ọwara nke Guinea bụ egwu egwu egwu nke oke osimiri Atlantic na-ekpo ọkụ site na Cape Lopez na Gabon, ugwu na-ama ike ruo Cape Palmas na Liberia . [1] Null Island, nke akọwara dị ka njikọ nke Equator na Prime Meridian ( latitude degrees zero na longitude), dị na mmirira mmiri.. [1]
Otu n'ime osimiri ndị na-ahọba n'Ọwara Oké Osimiri Guinea bụ Niger na Volta . Oge oke osimiri dị n'ụka oke osimiri Bight of Benin na Bight of Bonny .