La Calzada is an offshore rock barrier located near Mataro, Spain. This reef site features depths ranging from 15 to 20 metres, making it suitable for intermediate snorkelers and divers. Access to the site requires a boat. Water temperatures fluctuate throughout the year, ranging from 13C in February to 26C in August. Facilities available in the area include parking, showers, changing rooms, air fills, equipment rental, and a dive shop. Due to the moderate currents and depth, this site is best suited for those with previous experience in open water environments.

Alguer de Mataró is a vast meadow of Posidonia oceanica seagrass located 1600 metres off the coast of Mataro, Spain. This site is accessible only by boat and is suitable for intermediate divers and snorkellers. Depths range from 5 to 20 metres, with an average of 10 metres. Visibility varies between 10 and 30 metres, and currents are generally mild. Species recorded around this area include Mediterranean moray, common octopus, great barracuda, marbled electric ray, various wrasses, scorpionfish, and sea stars. Due to the location, divers and snorkellers should remain aware of boat traffic in the area. Facilities including equipment rental and air fills are available nearby.

Las Conchas is a rocky reef located off Mataro, Spain, accessible only by boat. The site features a reef structure reaching depths between 14 and 23 metres, requiring careful monitoring of depth and air consumption. Divers encounter patches of Posidonia seagrass and rocky formations throughout the area. Conditions include mild currents, though visibility can vary significantly between visits. The site is suitable for beginners, but good buoyancy control is necessary to avoid sharp rock edges. Divers should exercise caution when re-entering the boat due to the rocky terrain. It is recommended to check local conditions and visibility with boat operators before planning a dive.

Els Canals is a reef and canyon site located off Mataro, Spain. The topography features rocky walls and sandy patches, with depths ranging from 12 to 18 metres. Visibility is generally good, between 15 and 30 metres, and currents remain mild, making it suitable for beginner divers. Access is by boat only. Divers should be aware of boat traffic when surfacing and avoid contact with sharp rock formations. Species recorded around this area include common octopus, Mediterranean moray, wrasses, scorpionfish, various nudibranchs, and sea stars. Air fills, equipment rental, and guided tours are available locally to support your dive.

La Pedra Den Cinto is a reef and wall dive site located off the coast of Mataro, Spain. The site features a consistent depth range between 9 and 10 metres, making it suitable for beginner divers. Access to the site is by boat, and underwater conditions typically involve mild currents. Divers can expect a standard dive duration of approximately 40 minutes. Water temperatures fluctuate throughout the year, ranging from a low of 13C in February to a high of 26C in August. As a shallow reef and wall formation, it offers a straightforward environment for those developing their diving skills in the Mediterranean.

Canons is a varied underwater site featuring a reef, wall, and canyon system located 1000 metres off the coast of Mataro. The topography drops from 8 to 40 metres, with an average depth of 20 metres. Divers encounter moderate currents that can strengthen within the canyon sections, requiring solid buoyancy control. Visibility typically ranges between 15 and 25 metres. The site is suitable for intermediate divers and supports night diving. Water temperatures fluctuate between 13 and 19 degrees Celsius throughout the year. Due to the significant depth and potential for strong currents, divers should monitor air supply and decompression limits closely while avoiding sharp coral and rocks.

Negre is a marine site in Mataro, Spain, featuring a combination of a shallow reef and a wall that descends to 25 metres. With an average depth of 13 metres and mild currents, the site is suitable for beginners. Visibility ranges from 10 to 30 metres, allowing for clear observation of the white gorgonians and rock fauna. Species recorded around this area include Mediterranean moray, common octopus, great barracuda, marbled electric ray, wrasses, Turkish wrasse, flatworms, Mediterranean violet aeolid, cow snail, scorpionfish, Cratena slug, flamingo tongue, torpedo ray, and sea stars. Boat access is required, and local facilities provide air fills and charter services.

Xori B is a boat-access reef located 1000 metres off the coast of Mataro, Spain. The site features a reef structure ranging from 5 to 18 metres in depth, with an average depth of 12 metres. Conditions are generally mild, with visibility typically between 5 and 15 metres. The site is suitable for beginner divers, though caution is required around the reef structure due to sharp coral and rocks. Divers should avoid contact with the sea floor and reef surfaces to prevent injury. Boat charters and guided tours are available through local dive shops to facilitate access to the site.