Scuba diving in Tonga is renown for its caves, drop-offs and pinnacles, as well as the opportunity of diving close to whales. Stunning coral reefs with visibility up to 40 meters (131 feet) and a water temperature ranging from 24C degrees (74F) to 28C (84F), make Tonga an outstanding diving destination.
The main island of Tongatapu lacks outstanding dive features, although there are some excellent walls around the offshore islands with an abundance of marine life. For those after caves, the island of 'Eua to the south offers good diving. Good snorkelling can be found off Ha'atafu Beach on Tongatapu and around the offshore islands which are all noted for their small colourful marine life.
In Ha'apai you’ll find canyons, caverns, tunnels, and vertical walls to explore. Among all this, there are rich coral gardens and a myriad of marine life. Whales can also be seen while scuba diving here.
Vava'u offers drift dives at the drop off and along walls where lots of large marine life exist. From July to October you can also see humpback whales. Wreck diving off Neiafu also offers great diving. Vava'u has reefs coupled with exceptional visibility averaging 30 metres plus. Snorkelling sites are also exceptional with coral gardens off Nuapapu Island and Mala Island. You might even hear humpback whales singing in the distance between May and October. With over 50 islands in the Vava'u group, new dive sites are still being discovered.