Montgat, Spain offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Montgat is known for its beautiful beaches and proximity to Barcelona. The best time to travel to Montgat, Spain, is from June to September, when the average air temperature is around 75°F (24°C) and the average water temperature is about 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!