Rio das Ostras, Brazil offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Dores is known for its scenic location on the shores of Loch Ness, attracting tourists seeking views of the famous lake and its legendary monster. The best time to travel to Rio das Ostras, Brazil, is from April to September, when the average air temperature ranges from 20°C to 28°C (68°F to 82°F) and the water temperature is around 22°C to 25°C (72°F to 77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!