Porto Moniz, Portugal offers 1 beach perfect for sunbathing, surfing, swimming, and more. Porto Moniz is known for its natural volcanic swimming pools. The best time to visit Porto Moniz, Portugal, is from May to September, when the average air temperature is around 22°C (72°F) and the water temperature is approximately 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!