In the north, it is hard to find really good long peeling waves. The best waves are at river mouths and sandy points. There are a few spots but in general you should not come to the north of Brazil with the expectation of riding tons of perfect waves. That said, if there is some swell in the water, certain spots at river mouths, sandbars and points can produce some fun stuff! And, there are incredible wave spots in other parts of Brazil like Natal, Rio, Floripa — so consider those too.