Florianopolis
Florianopolis or Floripa (its nickname) is the capital and of the state of Santa Catarina, and having some of Brazil´s greatest beaches, this city is half on the main land and half on the island. Great tropical climate almost all year, the "cold season" starts in May and ends in September, if we can call it cold at all! Most activities in Floripa are related to water sports, like surfing and windsurfing, having great spots known worldwide and host of a lot of professional surfing competitions. Joaquina and Praia Mole are the best surf locations, and windsurf at Lagoa da Conceiçao. You can find lots of boats that offer trips around the island, taking you for a day trip to the nearby islands and the Fortress there, then you can take a swim by diving of the boat and enjoy the dolphins that are always around, as if they know they are expected. A great place to visit, and definitely a place you will go back.
