No scheduled transport.
The Barreirinhas - Atins boat calls occasionally and certainly if you request so upon boarding.
Hoards of daytrippers come in between 10 AM and 1 PM, -approach their drivers to learn where they are going, seats available and so on. There is always a motor launch idle, but this will prove more expensive unless you are a big grupo, or its heading your way for some different reason.
Ask at the pousadas if they have a truck for Paulino Neves along the beach. If one is already booked, you can usually hop on paying the corresponding fraction of the full price, which is about R$ 150.