Costa Cálida is the approximately 250 km stretch of Mediterranean coastline of the Spanish province of Murcia. This region has a micro-climate which features comparatively hot mean annual temperatures (and hence its name, Costa Calida "Warm Coast") and a relative degree of aridity (precipitation averaging less than 34 cm annually). The Costa Cálida extends from El Mojón in the north near the province of Alicante, to near the municipality of Águilas in the south bordering on the region of Almería province.
The northern end of this coastline includes the Mar Menor ("Lesser Sea"), a coastal saltwater lagoon which at around 170 km2 is Europe's largest. The Mar Menor is separated from the Mediterranean by a 22km-long spit of land called La Manga, on which most of the tourism development for the region has been constructed. Cartagena and Mazarrón are two other important coastal towns in the region.