Lake M'bakré, on the West African coast, south of Abidjan, is facing the consequences of eutrophication and recent developments in its surroundings. To assess the physico-chemical quality of its waters, the monitoring of physico-chemical parameters was carried out between June 2013 and March 2014. The results of the analyses show that its waters are neutral to alkaline, well oxygenated, not very mineralised, warm all year round, benefit from a good water quality and are little affected by the poor development of its surroundings. The lake's waters are not affected by the nutrient salts measured and these parameters remain below international standards.