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.

Honeymoon Island is a shallow reef site located 500 metres off the coast in San Carlos Bay. With an average depth of 2 metres and minimal current, it is suitable for beginner divers. Visibility typically ranges from 10 to 30 metres, providing clear conditions for observing the reef environment. Water temperatures fluctuate significantly, ranging from 18 degrees Celsius in February to 30 degrees Celsius in August and September. Access to the site is by boat only, with dive shops and charter services available in the nearby town of San Carlos. Species recorded around this area include California sea lion, king angelfish, Panamic green moray, scorpionfish, round stingray, and spiny lobster.

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.

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.

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.

Piedras Pintas is a volcanic cove situated at the base of Tetakawi Mountain in San Carlos Bay. This site features a combination of natural reef and artificial reef structures, offering depths ranging from 3 to 15 metres with an average of 8 metres. Divers and snorkellers access the site directly from the shore. Conditions are generally mild, though visibility fluctuates between 5 and 30 metres depending on the season. Water temperatures vary significantly throughout the year, from 18C in winter to 29C in late summer. Hazards at this location include jellyfish, sea urchins, sharp coral, and stonefish. The site is best suited for intermediate divers.

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.

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.