Where could an American college student move to in Brazil?

I am a 24 year old male that is thinking about moving to Brazil for a few months just because I can do it. I want to live along the coast during their summer months.. need a good area that I could live safe and cheap for a few months. Any ideas? Or suggest other places to move to with beautiful coastal areas to live at for cheap. I have lived in England, France, China, Sierra Leone, Canada, and in 8 different states so I am an experienced traveler..