Adele Island (Motuareronui) is a predator-free sanctuary located in the Astrolabe Roadstead. The site features rocky reef systems, particularly around the northern end of the island. Access is by boat, as the site is situated 5000 metres from the shore. Divers and snorkellers can expect mild currents and water temperatures ranging from 13C to 20C throughout the year. The site is suited for intermediate divers, and it is also a popular location for snorkelling, with a rating of 4/5. The topography consists of rocky reefs, providing a distinct underwater environment for visitors to explore within the Abel Tasman region.

Tonga Quarry in Abel Tasman is a reef site suitable for both diving and snorkelling. The topography features granite rocks located between Tonga Quarry and Foul Point. Depths at this site reach up to 15 metres. Access is via a shore entry. The site is rated highly for snorkelling, though divers and snorkellers should remain aware of boat traffic in the area. Facilities available at the site include parking and toilets. Due to the nature of the reef, caution is advised regarding sharp surfaces.

Split Apple Rock is a distinctive granite formation located 50 metres from the shore in Abel Tasman, New Zealand. This reef site features shallow water surrounding the iconic split rock, with additional sea caves accessible at the northern end of the beach. Conditions are generally mild, though divers and snorkellers should be aware of potential surf. The site is suitable for beginners and offers both shore and boat access. Water temperatures fluctuate between 12C and 20C throughout the year. Facilities including parking and toilets are available nearby. Typical dives at this location last approximately 60 minutes.

Taupo Point in Abel Tasman is a historic Pa site featuring a combination of natural reef and artificial reef structures. The topography includes sheltered coves and small granite islands, providing a rugged environment for snorkelers. Access is via the shore, and the site is best suited for intermediate snorkelers due to potential surf conditions. Water temperatures fluctuate between 13C and 20C throughout the year. Species recorded around this area include long-nosed fur seals, sea stars, crabs, tube worms, eleven-armed sea stars, snails, and triplefins. Toilets are available at the site, and typical sessions last up to 120 minutes.

Tata Islands, comprising Motu and Ngawhiti, are located 1000 metres offshore from Tata Beach in the Abel Tasman region. This reef site offers sheltered conditions suitable for both diving and snorkelling, with an entry possible from either shore or boat. Divers and snorkellers should be aware of mild currents and boat traffic in the area. Water temperatures fluctuate throughout the year, ranging from 13C in winter to 20C during the peak summer months. Facilities available at the nearby beach include parking, toilets, showers, and changing rooms. The site is best suited for intermediate-level divers.

Ataata Point is a reef and drift dive site situated at the northern end of the Horoirangi Marine Reserve. The topography consists of dramatic bedrock reefs and boulder formations. Divers can expect depths ranging from 5 to 20 metres, with an average depth of 12 metres. Access is via a shore entry, with the site located 400 metres from the shore. Conditions vary, with visibility ranging from 1 to 15 metres and moderate currents present. Due to the potential for rip currents and low visibility, this site is suited for intermediate divers. Snorkelling is also a viable activity here.

Cable Bay in Abel Tasman is a sheltered pebble beach providing access to the Horoirangi Marine Reserve. The site features a reef environment with depths ranging from 2 to 20 metres, averaging 7 metres. Divers and snorkellers can explore the rocky edges along the left side of the bay towards Pepin Island, located up to 800 metres from the shore. Conditions include mild currents and visibility between 4 and 10 metres. The site is suitable for beginners, though users should be aware of potential hazards including boat traffic, surf, and rip currents. Facilities at the entry point include parking and toilets.

Haulashore Island is a reef and artificial reef site located 500 metres offshore near the entrance to Nelson harbour. Snorkelling is primarily conducted along the sheltered eastern side of the island. The site features depths ranging from 2 to 10 metres, with an average depth of 6 metres. Conditions are variable, with visibility typically between 3 and 8 metres and currents that can be strong. Due to the proximity to the harbour, boat traffic is a significant hazard. Access to the site requires a boat or kayak. This location is suitable for beginners, though the snorkel rating is 2 out of 5.