Balneario Camboriu is a great option for people that want to spend some days or weeks in a place with nice beaches, friendly people and a lot of things to do and see. It has beaches for all kinds of tastes, from almost untouched to very crowded and full of beautiful people. There you will find Brazil´s first nudist beach, called Praia do Pinho.
Well, if you didn´t believe me when I said that it was full of beautiful people, check this video out. By the way, if you don´t want to see a lot of girls in bikinis then do not watch it hehe.
Told you, in this beaches you even see from time to time, a lot of brazilians top models like Alessandra Ambrosio, Adriana Lima and Gisele Bundchen, and others brazilians celebrities.
If you like sports, you´ll wont be disapointed. In the main beach you find special areas to play soccer, voleyball, futevolei(a variation of voleyball that is played with feet), do exercises... Plus that there are other areas where you can ride jetskis(you can rent one there). Surf is also a good option, as the state of Santa Catarina is one of the most famous surf spots in Brazil. And there are more options but they are too much to list here.