Mainland Spain's coastline runs from the Mediterranean's east to the Atlantic's south-west, and each stretch has its own character. Rather than pin this guide to a single town, here's an overview of the main regions — including the two where CasaLinking already has listings live (Costa Cálida and Costa de la Luz), so it stays a useful starting point as we add more.
The Costa Cálida, in the Murcia region, is built around the Mar Menor — Europe's largest saltwater lagoon, sheltered from the open Mediterranean by a narrow sand spit, which makes the water here noticeably warmer and calmer than a typical coastal resort. Los Alcázares, on the lagoon's western shore, is the region's relaxed, low-key base: over 7km of soft golden sand, a seafront promenade lined with chiringuitos, and flat water that's ideal for windsurfing, sailing and kayaking. The 16th-century Torre del Rame watchtower, a small Aeronautical Museum, and two well-regarded golf courses (Roda and Serena) round out the area. Región de Murcia Airport (RMU) is about 30 minutes away; Alicante Airport (ALC), roughly an hour, offers more direct European routes. Around 325 sunny days a year make it a genuine year-round destination. Look out for caldero, a Murcian rice-and-fish dish cooked in a cauldron over an open fire.
The Costa de la Luz — Andalusia's Atlantic coast in Cádiz province — trades the Mediterranean's calm for wilder beaches, real Atlantic surf, and a noticeably more low-key, less built-up feel than Spain's better-known costas. Tarifa, at the very southern tip, is Europe's kitesurfing capital, with over 20km of near-empty coastline, a charming old town, and views across the Strait of Gibraltar to Morocco. Conil de la Frontera has some of the least crowded fine white-sand beaches in the country and a strong seafood scene — fresh tuna and swordfish especially. Chiclana de la Frontera, with its 6km La Barrosa beach and the Castillo de Sancti Petri nearby, is a good base for golfers. El Puerto de Santa María is quieter and still distinctly Spanish, popular with those who want the coast without the crowds. Jerez Airport (XRY) serves the region directly; Seville Airport (SVQ) is a further, but often cheaper, option. Spring and autumn are the most comfortable seasons here — summer brings strong, reliable winds that are a big part of the region's appeal for watersports.
Centered on Alicante and towns like Jávea and Benidorm, the Costa Blanca is one of Spain's most established holiday coasts — safe, family-friendly beaches, a huge choice of apartments, and everything from quiet coves to lively resort strips within a short drive of each other. Alicante Airport (ALC) is one of the best-connected in Spain, with direct flights from across the UK and Europe.
Running along the Málaga coastline, the Costa del Sol is Spain's classic year-round sun destination — reliably warm even outside summer, well developed for tourism, and anchored by Málaga Airport (AGP), one of the country's busiest. Towns range from the resort energy of Marbella and Torremolinos to quieter spots further along the coast.
In the northeast, near Barcelona and Girona, the Costa Brava ("wild coast") is all rugged cliffs, pine forests and hidden coves around towns like Tossa de Mar and Lloret de Mar, while the Costa Dorada, further south around Salou and Cambrils, is the more classic family-beach option — wide golden sand and shallow, gentle water. Barcelona Airport (BCN) and Reus Airport (REU) both serve the area well.
Wherever in mainland Spain you're looking, CasaLinking listings are booked straight with the owner — no Airbnb or Booking.com commission, and payments handled securely through Stripe.