The naval Battle of the Saltes Island or Battle of Saltes (Spanish: Batalla de la Isla Saltés) took place on 17 July 1381, off Saltes Island, between the Kingdom of Castile and the Kingdom of Portugal during the Third Ferdinand War. The Castilian fleet commanded by Don Fernando Sánchez de Tovar defeated decisively the Portuguese fleet led by João Afonso Teles de Menezes, Count of Barcelos. The result of the battle was the destruction of the naval offensive capability of Portugal, achieving the Castilian naval supremacy in the Atlantic Ocean.