The body of water that borders Spain to the southeast is the Mediterranean Sea. This sea runs along Spain's southeastern coast, including regions such as Valencia and Murcia, and also surrounds the Balearic Islands, which are part of Spain
. More specifically, the southern coast of Spain borders the Alboran Sea, which is the westernmost portion of the Mediterranean Sea, extending up to the Strait of Gibraltar
. Thus, the Mediterranean Sea, including the Alboran Sea segment, is the primary body of water bordering Spain to the southeast.
