When you're traveling to a city in a warm climate split in two by the ocean, you can safely assume that plenty of adventure is in the cards. If you're looking to scour all corners of Santa Catarina Island or trek the epic canyons and mountains of greater Santa Catarina State or even trudge the stellar sands that exist within day trip distance, then a stay in Floripo is your ultimate choice in planning your next trip.
If time in the water and on the sand is your top priority, then you may never want to leave the city, for there are dozens of beaches both on the ocean and on Lagoa da Conceição, a lake at the heart of the island. Surfing, windsurfing, and diving is popular at beaches like Praia Mole and Barra da Lagoa, while you can add sandsurfing to the slate if you're heading out to Praia da Joaquina. For those who like their beaches only after they've trekked through the wilderness to get there, then you'll likely find Lagoinha do Leste and Praia dos Naufragados, both at the southern part of the island, to be right up your alley. Also, be sure to check out Morro da Lagoa for excellent views of the city.
Moving inland, you've got plenty of adventure options, as well as chance interactions with flora and fauna unique to the region. Sao Joaquim National Park is all mountains, waterfalls, and the chance sighting of the elusive puma, while Aparados da Serra is a deep canyon stretch with a handful of mist-haloed waterfalls that are breathtaking. Serra do Itajaí and Araucárias National Park are both fine hiking destinations within a half day's drive as well.
Lastly, despite the fact that you could throw darts at a map of the Santa Catarina coast and hit a gorgeous beach, there are a few destinations that rise above the rest. If you're a fan of every beach condition necessary for the water-sportsman in you, as well as the appeal of the best diving in southern Brazil, then head north to Bombinhas. Head south to Imbituba for some of the best surfing and whale watching in Brazil, while Garopaba retains the appeal of the fisherman's village it once was and infrastructure to support travelers that show up for its beaches.
If you're looking for a home base in which to explore the state of Santa Catarina and it's innumerable natural niches, then you can't do any better than Florianopolis. Also, be sure to check out the adventure eco-tour operators in the area for activities like paragliding and whitewater rafting. Yeah, you're going to like Florianopolis.