San Carlos Bay features diverse underwater topography including reefs, walls, pinnacles, and artificial structures. Divers can explore depths ranging from 5 to 25 metres, with an average depth of 15 metres. Access is exclusively by boat due to the site being 27 kilometres from shore. Conditions include mild currents and visibility between 9 and 25 metres. While suitable for beginners, the site presents risks including nitrogen narcosis and strong currents, necessitating close contact with a guide. Night diving is available, allowing for observation of nocturnal activity. Species recorded around this area include groupers, triggerfish, sea stars, and various invertebrates, while nearby sites host species such as snowflake morays and California sea lions.

Shangri-La is a wall dive in San Carlos Bay, Mexico, featuring depths ranging from the surface to 11 metres. The site is suitable for beginners, though divers must remain aware of potential strong currents that can develop alongside the generally mild conditions. Access is by boat only, and divers should carry all necessary equipment, including a surface marker buoy. The wall supports soft corals and provides habitat for blennies, gobies, snappers, and camouflaged species like frogfish and octopus. Night diving is available, offering improved opportunities to observe active marine life. Visibility is variable, and divers should monitor their surroundings closely throughout the dive.

Martini Cove, also known as The Aquarium, is a sheltered reef site in San Carlos Bay suitable for both diving and snorkelling. Divers and snorkellers access the site via shore entry, though it is also reachable by kayak or boat. The site features depths ranging from 2 to 18 metres, with an average of 7 metres. Visibility typically spans 10 to 20 metres. Water temperatures fluctuate between 18C and 29C, with chilly thermoclines possible at depth. Hazards include boat traffic, surge, and the presence of stonefish. Species recorded around this area include California sea lions, king angelfish, Panamic green moray, triggerfish, groupers, pufferfish, round stingrays, scorpionfish, wrasses, rock cod, whiptail stingrays, arrow crabs, and porcupinefish.

Seamount is a pinnacle and reef site located off San Carlos Bay. The structure rises from a depth of 30 metres to a shallow point at 6 metres, with an average depth of 15 metres. Divers should expect moderate currents and visibility between 10 and 30 metres. Due to the offshore location, boat access is required. Divers must maintain good buoyancy to avoid contact with sharp coral and rocks. Thermoclines are common, and water temperatures vary from 18C to 28C throughout the year. Species recorded around this area include California sea lions, Panamic green morays, king angelfish, scorpionfish, pufferfish, round stingrays, groupers, triggerfish, spiny lobsters, and threebanded butterflyfish.

Punta Cuevas is a rocky point located at San Carlos Bay, featuring underwater arches and small caves. This shore entry site is suitable for intermediate divers and offers visibility ranging from 10 to 30 metres. Divers may experience mild currents during a typical 45-minute dive. The site is also accessible for snorkelling, with a rating of 3 out of 5. Water temperatures fluctuate between 18C and 30C throughout the year. Potential hazards at this location include jellyfish, rip currents, and sea urchins. The topography is defined by its rocky structure and cave formations.

The ARM Santos is a deliberately sunk vessel located in San Carlos Bay, resting at depths between 6 and 17 metres. This artificial reef offers a range of depths suitable for beginner divers, with visibility typically spanning 10 to 30 metres. Access to the site is by boat only. Divers should exercise caution regarding entanglement risks when navigating the wreck structure and remain vigilant for boat traffic near the surface. The site features mild currents, allowing for generous bottom times during a typical 45-minute dive. Local facilities include a dive shop to support excursions to this wreck.

The Suchiate is a wreck site located in San Carlos Bay, Mexico, resting at depths between 4 and 16 metres. This artificial reef is suitable for beginner divers, offering a manageable profile with mild currents. Access to the site requires a boat. Visibility is variable, often reaching up to 6 metres. Divers should exercise caution regarding the ship structure, maintaining distance from sharp edges and structural elements to avoid entanglement. Due to the potential for confusing navigation inside the wreck, booking a guided tour through the local dive shop is recommended for those unfamiliar with the layout.

Eagle Rock is a submerged pinnacle site in San Carlos Bay, featuring a reef and wall structure. Divers can explore depths ranging from 9 to 30 metres, with an average depth of 12 metres. Visibility typically spans 10 to 30 metres. Due to moderate currents and potential surf at the coastline, boat entry is required. The site is suitable for intermediate divers comfortable with drift conditions. Night diving is available at this location. Water temperatures fluctuate between 18C and 28C throughout the year. Divers should carry a surface marker buoy to assist with boat pick-up in choppy conditions.