Pemba has a 100 meter blue water drop off only 500 meters away from the beach. It is just too far to swim there. Best to go by boat with CI Divers (+258-82-6822700) or Pemba Dive (+258-82-3132266).
Inshore there are kilometers of shallower reef hosting swarms of juveniles, and
some rare fish sightings. Water temperature ranges from 25 degrees C in winter (July) to over 30 degrees in summer (December). Pemba coral is healthy and boasts a high incidence of different species.