Spain's electronic circuit.
The full picture.

Two days of electronic, alternative and indie music in Sevilla — a city that doesn't get nearly enough credit as a destination for this kind of event. Interestelar is mid-size (8,000 people), well-programmed and genuinely affordable at €70. It runs in May before the summer heat becomes overwhelming, which in Sevilla is worth factoring in. Not a beach event and not a house music specialist — but a strong, well-priced electronic event in one of Spain's most compelling cities, and the earliest on the calendar of the six listed here. If you're planning a spring long weekend in Andalusia around a festival, this is the one.

Valencia's electronic scene rarely gets the attention its quality merits, and Deleste is the reason to pay attention. Two days, €70, 10,000 people — a proper electronic and indie event in a city that knows how to programme it. This is the warmup to Spain's electronic summer rather than the main event, which is both its selling point (cheaper, less crowded, better atmosphere than the August peak) and its limitation (it's in May, not the beach season). Valencia Airport is 15 minutes from the city centre. The beach at Malvarrosa is a 30-minute tram ride from the venue, so the coastal argument is available even if the festival itself isn't a coastal event.

Valencia's flagship multi-genre event, with strong electronic and dance programming across two days in the city. 40,000 capacity, €110, and a track record of booking both established acts and credible underground names. It sits in the first week of June — late spring temperatures, pre-Sónar, before the summer crowds. Festival de Les Arts isn't a pure electronic event, but the electronic and dance stages are taken seriously, and for Valencia as a starting point into Spain's festival summer it's a strong anchor. It's the festival you combine with a few days in the city, a visit to the Paella heartland, and a morning on the Malvarrosa beach before the August hordes arrive.

Six days before Sónar opens, Barcelona transforms. OFFSónar is the unofficial festival-within-a-festival — hundreds of club events, day parties, warehouse shows and beach stages across the city and the adjacent district of Hospitalet de Llobregat. Individual events range from free to around €25. A festival pass for the main showcases runs around €75. The programming spans techno, house, experimental and everything adjacent, with lineups that often outperform the main festival for pure underground credibility. The beaches are there. The clubs are there. The sun is out. OFFSónar is the answer to "I want techno and house near a beach in Spain for under €100" — and it's been the answer for about two decades while the rest of the world only recently noticed.

In its 33rd year. Sónar is not a festival you explain — it is one of the most important electronic music events in the world, and Barcelona is one of the most important cities for understanding why electronic music became a global language. Three days split across two venues: Sónar by Day at Fira Montjuïc (exhibitions, experimental stages, visual art) and Sónar by Night at Fira Gran Via near the airport (the main electronic programming, 80,000 people, the best production on the Spanish electronic circuit). €185 puts it above the budget threshold of this guide. It is included because any guide to Spain's electronic music scene that excluded Sónar on price grounds would be doing its readers a disservice. If you're in Barcelona for OFFSónar and Sónar is happening that same week — you should try to go to both.

The beach electronic festival in Spain. Medusa Sunbeach is 150,000 people on the sand at Cullera — a resort town on the Valencia coast — across five days in mid-August. The programme covers EDM, house, techno and hardstyle across multiple stages, with the sea as the constant backdrop. At €165, it's the most expensive festival in this guide and the only one that delivers the combination of beach, scale, and electronic music in the same package. The crowd is young and international, the production is enormous, and the setting is genuinely spectacular. Accommodation in Cullera books out three to four months in advance — plan accordingly. Valencia Airport is 45 minutes by road; the train from Valencia Estació del Nord to Cullera takes 30 minutes and is the most practical option without a hire car.