The East coast is where San Juan dive stores take their tourist divers and where the dive stores in the vicinity of Fajardo dive. Bone white beaches lead to shallow reefs, some of which have been buoyed in order to minimise damage to the reef.
Visibility is variable due to a combination of factors.
Shallow sites with a fine sandy bottom are vulnerable to swells stirring up the sediment. Rainwater run-off from the mainland rain forests also affects these sites. Visibility is generally better in the summer but it can vary from day to day in the winter, with 50 feet one day and 25 feet the next. The other advantage of this area is that the sea state is generally calm. When there are big swells the dive boats can go to the lee side of the island where they are sheltered from the seas.