Kogin Ouémé, wanda aka fi sani da kogin Weme, kogi ne a ƙasar Benin. Yana hawa ne a tsaunukan Atakora, kuma tsawon shi ya kai kimanin kilomita 510. Yana ratsa garuruwan Carnotville da Ouémé zuwa wani babban haddi a mashigin tekun Guinea kusa da tashar jirgin ruwan Cotonou. Manyan koguna sune Kogin Okpara da kuma kogin Alpouro. Kogin Ouémé shi ne mafi girma a Kogin Jamhuriyar Benin. Tana tsakanin 6° 30° da 10° arewa latitude da 0° 52 'da 3° 05' longitude gabas (Oba S. Alain 2018). Yana ƙetare yankuna da dama na amfanin gona da abinci a can, tsarin lagoon ''Lake Nokoué-lagoon na Porto-Novo'' ta yankin Delta. Kananan Delta na Ouémé, yana tsakanin latitude 6° 33'N da 8° 15' da meridians 1° 50' da 2° 00' (Zinsou et al., 2016). Deltaananan Delta na Ouémé ya fara ne bayan karamar hukuma ta Adjohoun a cikin sashen Ouém kuma ya ƙare a facade ta kudu inda kogin ke kwarara zuwa cikin lagoon hadaddun '' Nokoué-Porto-Novo '' (Lalèyè et al., 2004).