There are a few nice reefs and two ship wrecks in the Port Barton Bay. Diving is worthwhile and a must. Two diving centers located in the beach offer three dives for 4000 Peso. They also offer certification courses or you can do a “beginner’s dive” if you do not have a licence.
The two shops are located right in the beach at its two ends. Easy Dive is run by Doris who speaks native German and good English. Aquaholics belongs to a British guy, Keith, and is by far more popular of the two shops. You can book your dives with Aquaholics on-line or just go directly to their beech front cottage.
If you have a bit more time consider becoming a certified diver and book up for the SSI course with Martyn, who will not only get you ready for the exams but also will make sure that you really enjoy the course.