Mostardas, Brazil offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mostardas is known for its beautiful beaches and proximity to the Lagoa do Peixe National Park. The best time to travel to Mostardas, Brazil, is from December to March, when the average air temperature ranges from 22°C to 28°C (72°F to 82°F) and the water temperature is around 24°C to 26°C (75°F to 79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!