The boats were presented over the weekend in Puntarenas. Each is 11.5 meters (about 38 feet) and can carry four persons.
The security ministry to which the coast guard agency is attached, said the boats would be used for fighting illegal fishing and drug trafficking.
Colombian drug smugglers typically use similar open boats with three outboard motors. They are capable of high speed and usually are first intercepted by helicopters.
The Guardacostas also received a catamaran donated by Mar Viva, the environmental group. It will be used to patrol the area around Isla de Coco.