Castello de la Plana, Spain offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Castello de la Plana is known for the Magdalena Festival and the Fadrí Tower. The best time to travel to Castello de la Plana, Spain, is from May to June, with average air temperatures around 70-80°F (21-27°C) and water temperatures around 68-72°F (20-22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!