Grumari is the best surf beach in rio for surfers who hate crowds.. really cool place at the end of the beach you can easy paddle out.
Canto das Aranhas is the end of Mocambique, It’s a great option in NE winds due to a rocky coast that protect the waves from these winds.
Some people claim it as the most consistent spot in Florianópolis, but only a few can check it out everyday. The place is all preserved, pretty landscape, hard trail though.
Take right when you reach the Pântano do Sul beach, you’ll see the place at your left. Usually uncrowded, it has its days, but usually the waves are all close outs. If you’re going on that direction, check it out.
Alternative surfing spot, produces good waves with S swell and N,W wind. Small beach with a good right. Follow the road from Praia dos Açores and make local inquiry to get exactly direction.