Sao Francisco Do Sul, Brazil offers 20 beaches perfect for sunbathing, surfing, swimming, and more. Sao Francisco Do Sul is known for its charming colonial architecture and beautiful beaches, making it a popular travel destination in Santa Catarina, Brazil. The best time to travel to São Francisco do Sul, Brazil, is from December to March, when the average air temperature ranges from 75°F to 85°F (24°C to 29°C) and the water temperature is around 77°F to 82°F (25°C to 28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!