Shark Alley in Gansbaai features a diverse underwater landscape comprising natural reef, kelp forest, and artificial reef structures. The site is suitable for beginners, with depths ranging from 3 to 12 metres and an average depth of 8 metres. Visibility varies between 3 and 12 metres, often influenced by the kelp density. While currents are generally mild, divers should remain aware of potential surges, particularly during shore entry. Water temperatures typically range from 15C to 19C, though they can fluctuate between 12C and 20C. Due to the cold water, a 5mm wetsuit with a hood is recommended, with 7mm suits and gloves advised for cooler conditions.

The Shallows in Gansbaai is a shallow reef and kelp forest site suitable for beginners. Divers typically experience depths averaging 1 metre, with a maximum depth of 1 metre. Access is via a shore entry. Conditions vary, with visibility ranging from 2 to 8 metres and water temperatures generally between 15C and 19C, though upwelling can cause temperatures to drop as low as 7C. The current is mild, but divers should be aware of hazards including surf, sea urchins, and sharp coral. A typical dive at this location lasts approximately 30 minutes.

Gansbaai Tidal Pool is a large, well-maintained marine site situated along the Perlemoen Hiking Trail. This shore-entry location features rocky nooks and a wall structure, providing a protected environment for divers and snorkellers. The site is suitable for beginners, with mild currents and typical dive durations of 45 minutes. Water temperatures generally range from 12°C to 20°C, with the warmest conditions occurring in January and February. Facilities at the site include parking and toilets. Divers should be aware of sea urchins present in the area.

Skulpiesbaai in Gansbaai is a marine site featuring reef structures and kelp forests. Accessible via a shore entry, the site is suitable for intermediate divers and offers a snorkel rating of 4/5. Conditions vary, with water temperatures ranging from 15C to 19C throughout the year and mild currents. Divers and snorkellers should be aware of sharp coral as a potential hazard. Facilities at the location include parking and toilets. The site provides access to open ocean channels, making it a practical choice for those exploring the local reef topography in the Western Cape.

Stanford's Cove in Gansbaai is a sheltered site featuring a small white sandy beach. Divers and snorkellers access the water via a narrow channel on the far edge of the beach, which leads to deeper water. The site is characterised by rocky reefs and kelp forests. It is suitable for beginners, though divers should be aware of moderate currents and the potential for strong currents in the area. Depths start at approximately 2 metres. Facilities available at the site include parking, toilets, and showers. Water temperatures range from 15C to 19C throughout the year.

De Kelders Pebbly Cove is a rugged site situated beneath the cliffs of Gansbaai. This location features a rocky shoreline and a kelp forest ecosystem located just offshore. Access is via a shore entry that requires a clamber over rocks, making it suitable for intermediate snorkellers. Water temperatures at the site vary between 15C and 19C throughout the year. Due to the nature of the coastline, snorkellers should be aware of surf conditions and sharp rocks when entering or exiting the water. Parking and toilet facilities are available for visitors at this location.

Romansbaai Beach in Gansbaai is a north-facing, sheltered site featuring 3km of white sand and rocky outcrops. The area is characterised by nearshore reefs and rock pools that remain protected from prevailing southeasterly winds. Snorkellers can explore these shallow reef structures at depths ranging from 1m to 5m, with an average depth of 3m. Access is via the shore. Conditions include moderate currents and surf, making this site suitable for intermediate snorkellers. Water temperatures fluctuate between 15C and 19C throughout the year. Typical sessions last approximately 45 minutes.

Shark Alley is a reef and drift site situated in the channel between Dyer Island and Geyser Rock. Located 8,000 metres offshore, this site requires boat access and is suited for advanced divers due to moderate currents and surf conditions. The average depth is 5 metres, with a range of 1 to 10 metres. Visibility typically fluctuates between 1 and 10 metres. Water temperatures vary between 15C and 19C, influenced by the meeting of the Agulhas and Benguela currents. Hazards include boat traffic, cold water, sharks, strong currents, and surf. Species recorded around this area include Great White Sharks, Long-nosed Fur Seals, Leopard Catsharks, Smooth Rays, and various invertebrates.