Castor Rock is a reef and pinnacle system located 3300 metres offshore in the Roman Rock Area. The site features a varied topography with a maximum depth of 22 metres to the north and 18 metres to the south. The highest point of the reef reaches 7 metres, with additional pinnacles rising above 12 metres. Divers should be prepared for mild currents and surge, with visibility typically ranging from 5 to 15 metres. Water temperatures fluctuate between 14C and 17C throughout the year. Due to the offshore location, boat access is required. Species recorded around this area include common octopus, long-nosed fur seals, pyjama sharks, and various reef fish.

The SAS Fleur is a 53-metre Bar-class boom defence vessel scuttled in 1966. Located in the Roman Rock Area, this wreck sits at depths ranging from 33 to 41 metres, with an average depth of 35 metres. Access is strictly by boat, as the site is situated 11.8 kilometres from the shore. Divers should be prepared for strong currents and cold water temperatures between 13 and 15 degrees Celsius. Due to the depth and conditions, this site is suitable only for advanced divers. Hazards include nitrogen narcosis, strong currents, cold water, and the presence of sharks.

Seal Island in the Roman Rock Area is a boat-access reef site located 5700 metres from the shore. Divers can expect depths ranging from 2 to 9 metres, with an average depth of 9 metres. Conditions feature moderate currents and visibility fluctuating between 1 and 15 metres. Water temperatures typically range from 15 to 18 degrees Celsius. The site is suitable for beginners, with dives lasting approximately 60 minutes. Hazards include the presence of sharks. Species recorded around this area include long-nosed fur seals, common octopus, smooth rays, European common cuttlefish, leopard catsharks, puffadder shysharks, pyjama sharks, crayfish, flatworms, gurnards, klipfish, hottentot, morwong, and soft coral.

York Shoal is a reef located in the Roman Rock Area of False Bay. The site features a reef top at approximately 4 metres, sloping down to a maximum depth of 28 metres at the edge of the surrounding shingle bottom. Divers typically experience average depths between 18 and 20 metres. The shallower sections of the reef are characterised by heavy growth of red-bait ascidians and patches of black mussel. Access to this site is by boat only, and conditions include variable currents and visibility. Due to the depth and potential for variable conditions, this site is suited for intermediate divers. Be aware of boat traffic and cold water temperatures.

Whittle Rock is a reef located in the Roman Rock Area of False Bay, South Africa. Situated 8000 metres from the shore, this site requires boat access and is suited for intermediate divers. The reef topography spans depths from 3 to 40 metres, with an average depth of 20 metres. Divers should be prepared for variable conditions, including moderate currents, surge, and cold water temperatures typically ranging between 13C and 15C. Due to the offshore location, boat traffic is a noted hazard. Guided tours are available for those exploring this expansive reef system.

Windmill Beach in the Roman Rock Area offers a diverse marine environment featuring a mix of reef, kelp forest, and artificial structures. This shore-entry site is suitable for beginners, with depths ranging from 0 to 30 metres and an average depth of 15 metres. Divers should be prepared for cold water, surge, and the presence of sharks. Visibility varies significantly between 3 and 25 metres. Species recorded around this area include long-nosed fur seals, common octopus, pyjama sharks, and puffadder shysharks, alongside various crustaceans and soft corals. The site supports night diving, with typical dives lasting around 60 minutes.

Friskies Pinnacle is a marine dive site located in the Roman Rock Area of False Bay. This pinnacle features a top depth of 12 metres and reaches a maximum depth of 22 metres, with an average depth of 18 metres. Access to the site is by boat only. Divers should be aware of potential strong currents, though conditions are generally mild. The site is suited for intermediate divers. The topography includes shallower areas with red-bait pods and sections populated by strawberry anemones, providing opportunities for macro photography.

Tivoli Pinnacles is a reef system located east of Roman Rock in the Western Cape. The site consists of pinnacles rising from a sandy bottom at 22 metres to a shallowest point of 10 metres, with an average depth of 16 metres. Divers access the site by boat, which is required due to its position 250 metres from shore. Conditions feature mild currents and visibility ranging from 6 to 15 metres. Water temperatures typically fluctuate between 14 and 17 degrees Celsius, though upwellings can cause temperatures to drop as low as 9 degrees Celsius. This site is suited for intermediate divers, with typical dive times around 42 minutes.