Portomouro, Spain offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Portomouro is not widely recognized for travel and beach tourism. The best time to travel to Portomouro, Spain, is during late spring to early autumn (May to September), when the average air temperature ranges from 18°C to 25°C (64°F to 77°F) and the water temperature is around 16°C to 20°C (61°F to 68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!