Mona Passage
Boat dive · Whale watching
The channel between Mona Island and the main island, where humpback whales pass through in the winter months — spectacular breaching and socialising in family groups.
About this site
The Mona Passage is the deep channel between Mona Island and Puerto Rico, and one of the best places in the Caribbean to encounter humpback whales. Between December and March they migrate through these waters, and divers on boats in the area are often treated to spectacular breaching displays as the whales socialise in family groups. This is open-ocean boat diving with no reef — the draw is the encounter itself.
Marine life spotted here
- Humpback whales (winter)
- Dolphins
- Open-ocean pelagics
More in West Coast & Offshore Islands
Isthmus & Boquerón Reef
Sheer cliff-like walls on Mona Island, fed by currents from the open Atlantic and draped in gorgonian sea fans and black corals.
Silver Banks & Southern Pride
Offshore sites visited by passing pelagics — sharks, leatherback sea turtles and dolphins. Conditions can be tough, best suited to experienced divers.
Little Monita (Hobbit House)
An open-ocean seamount beside Mona Island visited by large numbers of sharks. Only diveable when sea conditions allow.