Lagoa, Portugal offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Lagoa is known for its stunning Benagil Cave and the picturesque Praia da Marinha. The best time to travel to Lagoa, Portugal, is from May to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!