I've been diving Arraial do Cabo some time ago myself and wondered how cold brazilian waters are, just bringing 5mm wetsuit with me
All the best
Thanks. It's good to know someone that knows Arraial do Cabo.
In fact, the cold water is just on South of Brazil. On the north the water is warm. The best place to dive in Brazil is Fernando de Noronha , an Island. It's a nice place.