There is a small reef in the estuary a couple of hundred metres in front of the lodge. This reef is full of fish and is a wonderful area to snorkel. At low tide the water at the reef may be discolored as the water from higher up the estuary moves over it, but once there is some tidal push the water quickly clears. One can get a ride out to the estuary reef with a boat and snorkel safely with the boat drifting at anchor nearby. Guests must bring their own snorkeling equipment, as the lodge does no supply snorkeling gear.
There is a reef about ten kilometers down the beach from the estuary mouth in front of the old San Sebastian lighthouse. This reef protects a sheltered bay, which is fantastic for swimming and snorkeling during low tide. There are caves and overhangs on the inside of the reef, which are packed with colorful tropical reef fish. Management at the lodge will organize excursions to the reef on request.