The Corner in Tonga features a varied underwater topography consisting of a reef, wall, and drop-off. Designed for intermediate divers, the site offers depths ranging from 15 to 30 metres with an average of 20 metres. Visibility typically spans 15 to 30 metres, allowing for clear observation of the structure. Divers should expect moderate currents and potential surge in shallower sections, which requires careful buoyancy control to maintain clearance from the reef. Access is exclusively by boat, and the site is suitable for year-round diving with water temperatures between 25 and 28 degrees Celsius. Always deploy a surface marker buoy to account for boat traffic during ascent.

J-Caves in Tonga offers a combination of open reef and an overhead cavern system. Divers typically explore depths between 15 and 30 metres, with an average depth of 25 metres. The site is accessible only by boat and requires intermediate skill due to the overhead environment, potential surge, and depth. Visibility ranges from 15 to 40 metres, though surface swell can funnel into the cave sections, making navigation unpredictable. Water temperatures remain between 25 and 28 degrees Celsius. Divers should be aware of frequent strong currents in the area and maintain close proximity to their guide and boat at all times.

Inga's is a marine site in Tonga featuring a combination of reef structure and a wall that drops into deeper water. Divers can expect depths ranging from 18 to 30 metres with visibility typically between 15 and 30 metres. The site is suited for intermediate divers, with water temperatures remaining between 25 and 28 degrees Celsius. While currents are generally mild, the area is subject to surge and swell, particularly near the reef section. Boat access is required for all dives, which typically last around 45 minutes. Divers should maintain a safe distance from the wall and reef to avoid being pushed by unpredictable surge.

Sisters is a reef and pinnacle site in Tonga featuring drop-offs that descend into depths of 20 to 30 metres. The topography consists of wall structures and pinnacle formations. Divers experience mild currents, though surge can occur, particularly near the pinnacles. Visibility ranges from 15 to 30 metres. This site requires boat access and is suited for intermediate divers. Water temperatures remain between 25 and 28 degrees Celsius throughout the year. Divers should exercise caution regarding potential entanglement with wreckage structures and maintain buoyancy control due to the deep water profile. Surface chop may affect boat pick-up at this exposed location.

Soft Rock is a reef dive in Tonga featuring solid underwater terrain across a depth range of 18 to 30 metres. This site is accessible only by boat and is suited for intermediate divers due to the depth and potential for surge. Visibility typically ranges from 15 to 30 metres, with mild currents present. Water temperatures remain between 25 and 28 degrees Celsius throughout the year. Divers should remain aware of their position relative to the reef, as surge can increase without warning. The habitat supports a variety of reef fish and invertebrates typical of the region.

Akoteu is a reef and drop-off site in Tonga accessible only by boat. The topography features a wall that reaches depths of 20 to 30 metres, though the site extends to 50 metres. Divers experience visibility ranging from 15 to 30 metres. While currents are typically mild, surge is a notable hazard that can push divers toward the reef face. The water temperature fluctuates between 25 and 28 degrees Celsius. This site is suited for intermediate divers who can manage depth and variable surface conditions. The habitat supports a variety of regional reef fish and invertebrates.

Lafa Lafa 1 is a multi-feature site in Tonga offering reef, pinnacle, and cave diving. The site ranges from 5 to 30 metres in depth, with an average of 18 metres. Visibility typically spans 15 to 30 metres. This is a boat-only site characterised by strong currents, making it suitable for intermediate divers with drift experience. The cave sections present an overhead environment requiring precise buoyancy control. Divers should remain aware of significant depth and potential nitrogen narcosis. The site features various reef habitats that support a range of regional reef fish and invertebrates. Divers must plan gas management carefully as there are no fixed facilities at this location.