Vilassar de Mar, Spain offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Vilassar de Mar is known for its beautiful beaches and the Museu de la Mina Vella. The best time to travel to Vilassar de Mar, Spain, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!