Castell de Ferro, Spain offers 1 beach perfect for sunbathing, surfing, swimming, and more. Castell de Ferro is known for its beautiful beaches and the historic Castillo de Castell de Ferro. The best time to travel to Castell de Ferro, Spain, is from May to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 20-24°C (68-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!