Old Sea Lions is a marine site located off the east coast of Isla Espiritu Santo, Mexico, featuring a combination of natural reef and artificial reef structures. The site is accessible only by boat and is suitable for beginners. Divers can expect depths ranging from 5 to 30 metres, with an average depth of 20 metres. Conditions are generally mild, with currents described as mild and visibility fluctuating between 3 and 18 metres. Water temperatures vary throughout the year, ranging from 20C to 26C. Typical dives at this location last approximately 50 minutes. Potential hazards include the presence of jellyfish and sharp coral.

Whale Shark Refuge Waters at Isla Espiritu Santo is a shallow reef site dedicated to snorkeling. Located 500 metres from the shore, the area features depths ranging from 0 to 5 metres with an average of 5 metres. Access is strictly by boat, and the site is managed for licensed boats and crews only. Conditions are generally mild with visibility reaching up to 30 metres. Water temperatures fluctuate between 21C and 29C throughout the year, though significant drops can cause the local fauna to vacate the area. Due to the presence of boat traffic, visitors should remain vigilant while in the water.

The Cortez Club offers a varied underwater landscape across reef, wreck, drift, and artificial reef sites, all accessed by boat. Depths run from 5 to 30 metres, with visibility typically between 10 and 18 metres and water temperatures of 20 to 26 degrees Celsius. Strong currents drive the drift dives and demand solid buoyancy control, which is why an Advanced Open Water certification is required. Reef species populate the shallower structures, while the deeper sites push that 30-metre range. Night diving is available for those who want a different perspective on the same sites. Sharks are present and should be factored into your dive planning.

La Paz, located at Isla Espiritu Santo, provides both reef and cave diving opportunities. The site features depths ranging from 5 to 30 metres, with an average depth of 12 metres, making it suitable for beginners. Divers and snorkellers can expect visibility between 20 and 30 metres and mild currents. Access to the site is by boat only. Water temperatures fluctuate between 20 and 26 degrees Celsius throughout the year. When navigating the reef, be mindful of hazards including jellyfish, sea urchins, and sharp coral. Typical dives last approximately 50 minutes.

La Punta Norte is a reef and artificial reef site located at the northern point of Isla Cerralvo. Divers can explore a maze-like topography that reaches a maximum depth of 18 metres. The site is accessible only by boat and is suitable for intermediate divers. Conditions feature moderate currents and visibility reaching up to 30 metres. Water temperatures fluctuate throughout the year, ranging from 21C in the winter months to 28C in September and October. Snorkellers will find this site well-suited to their activity. Hazards at this location include jellyfish, sea urchins, sharp coral, and stonefish.

Pichilingue is a shallow shore-entry reef located near La Paz, offering a calm environment for beginner divers. The site features a reef structure at depths of 4 to 5 metres, with an average depth of 4 metres. Visibility is approximately 5 metres, requiring close-up observation. Divers should exercise caution during entry and exit due to the presence of surf, sharp coral, rocks, and sea urchins; wearing thick-soled booties is recommended. Because the area experiences active boat traffic, divers must remain aware of vessel movement and use a delayed surface marker buoy upon ascent. Guided tours are available at this location.

La Gaviota is a shore-entry reef site located near Isla Partida at Isla Espiritu Santo. The site features a reef structure with depths ranging from 10 to 20 metres, offering divers flexibility based on their comfort level. Conditions are generally mild, with visibility typically between 5 and 10 metres. While the current is usually manageable, stronger surges can develop, requiring careful monitoring of water conditions before entry. Water temperatures fluctuate between 21 and 28 degrees Celsius throughout the year, making a 3 mm wetsuit suitable for most seasons. This site is well-suited for newly certified divers looking for straightforward reef diving.

San Rafaelito, located at Isla Espiritu Santo, features a combination of shallow reef areas and drop-offs reaching depths of 24 metres. With an average depth of 15 metres, this site is suitable for beginners and accessible via boat from La Paz. Divers encounter mild currents and visibility ranging from 15 to 30 metres. The topography includes cliffs and rocky structures. Night diving is available at this location, providing opportunities to explore the site after dark. Water temperatures fluctuate between 20C and 27C throughout the year. As a marine environment, the site is subject to local conditions, and divers should be aware of the presence of sharks.