Ha'apai is an island group in the South Pacific Ocean where visibility frequently exceeds thirty metres, making it one of the clearer diving areas in Tonga. The sites in our database cover a broad range of terrain, including reefs, walls, drop-offs, pinnacles, caves, and caverns, with drift diving also available. All dives are by boat only and are rated for intermediate divers. Resident species include green sea turtles, whitetip and blacktip reef sharks, pygmy seahorses, sea kraits, and nudibranch, among others. Humpback whales pass through Ha'apai waters from July through October, and operators in the group offer swimming encounters during this period.
Monthly water temperature across Haʻapai's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature is at its warmest from late summer through autumn and at its coolest during the July-to-October whale season, though conditions remain comfortable in a thin wetsuit throughout the year. Visibility is consistently high and tends to be at its best during the drier months from May through November.
4 operators
Water temperature around Haʻapai ranges from about 25°C in July to 28°C in March, based on satellite sea-temperature data for its dive sites.
In the warm season (about 28°C) a rash guard or 3mm shorty is comfortable in Haʻapai; in the coldest months (about 25°C) step up to a 3mm full suit.
Fin maps 8 sites in Haʻapai (8 scuba diving sites and 2 snorkelling spots, with some suited to both).
Across Haʻapai's dive sites, May, June, July, August, September and October are most often reported as the best months to visit.
