Frenchie's Beach in San Carlos Bay is a shallow shore-entry reef dive suitable for beginners. The site maintains a consistent depth of 5 metres with visibility ranging from 10 to 30 metres. Divers may encounter species including groupers, round stingrays, pufferfish, scorpionfish, hermit crabs, gorettes, brittle stars, sea stars, snails, sea cucumbers, and kelpfish. A thermocline is often present, causing sharp temperature drops even at shallow depths, so thermal protection is recommended. The site supports night diving, and guided tours are available through the local dive shop. Typical dives last approximately 45 minutes in this calm, current-free environment.

Tres Marias is a shallow reef located 1500 metres off the coast of San Carlos Bay. The site features a reef structure ranging from 2 to 6 metres in depth, with an average depth of 3 metres. Visibility typically spans 10 to 30 metres. While the site is generally suitable for beginners, divers must be aware of potential strong currents and maintain proper buoyancy control. Access is exclusively by boat. Divers can find full facilities, including equipment rental and air fills, at the departure point. The site is open for diving year-round, though conditions should be confirmed with local operators prior to entry.

Zorro's Cove in San Carlos Bay is a shallow reef site suitable for beginner divers. Located 500 metres from shore, the reef ranges from 2 to 6 metres in depth with an average of 4 metres. Divers can expect visibility between 10 and 30 metres. Access to the site requires a boat charter. Hazards include jellyfish, sea urchins, sharp coral, and stonefish; maintain good buoyancy control to avoid contact with the reef and marine life. Protective footwear is recommended. Facilities available at the departure point include parking, toilets, showers, changing rooms, and rinse stations.

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.

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.

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.

San Antonio Point is a reef site located 50 metres off the coast in San Carlos Bay. The site features a depth range of 6 to 30 metres, with an average depth of 7 metres. Divers encounter a variety of marine life including king angelfish, porcupine fish, puffer fish, stingrays, moray eels, and octopus. Conditions vary with visibility between 10 and 30 metres and water temperatures ranging from 18 to 28 degrees Celsius. The site requires boat access and is suitable for beginners, though divers must remain alert for strong currents and surge. Typical dives last 50 minutes, and shore facilities including rinse stations and changing rooms are available at the departure point.