The Battle of Winchelsea or the Battle of Les Espagnols sur Mer was a naval battle that took place on 29 August 1350 as part of the Hundred Years' War between England and France. It was a victory for an English fleet of 50 ships, commanded by King Edward III, over a Castilian fleet of 47 larger vessels, commanded by Charles de la Cerda. Between 14 and 26 Castilian ships were captured, and several were sunk. Only two English vessels are known to have been sunk, but there was a significant loss of life.