Playa del Castro, Spain offers 1 beach perfect for sunbathing, surfing, swimming, and more. Playa del Castro, Asturias, Spain, is known for its stunning coastal scenery and the nearby Castro de las Gaviotas rock formation. The best time to travel to Playa del Castro, Spain, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!