La Matella is a combined natural and artificial reef located in Mataro, Spain. The site features a gentle depth range of 2 to 12 metres, with an average depth of 3 metres, making it suitable for beginner divers. Divers can expect mild currents and visibility ranging from 5 to 20 metres. Entry is via the shore, and typical dives last around 30 minutes. Water temperatures fluctuate significantly throughout the year, ranging from 13 degrees Celsius in winter to 26 degrees Celsius in summer. Divers should select appropriate thermal protection based on the season and verify local access and parking conditions before arrival.

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.

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.

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.

El Circus is a reef site located off Mataro, Spain, accessible exclusively by boat. The site features a reef structure reaching depths of up to 18 metres, characterised by mild currents. It is well-suited for beginner divers looking to build confidence in a manageable environment. Divers should be aware of sharp rock formations throughout the reef and exercise caution regarding boat traffic during surface intervals and ascents. Water temperatures fluctuate seasonally, ranging from 13C in February to 24C in August and September. Due to the nature of the reef, wearing gloves is recommended to protect against contact with the sharp rock.

La Barra Nova is a reef site located off Mataro, Spain, suitable for beginner divers. The reef structure extends from the surface to a maximum depth of 18 metres. Divers can expect mild currents, though visibility varies between visits. Access to this site requires a boat. Due to the nature of boat-entry sites, divers must remain alert for boat traffic throughout the dive and during surface intervals. Water temperatures fluctuate significantly throughout the year, ranging from 13C in February to 24C in August and September, necessitating appropriate thermal protection based on the season.

Barreta D’en Serra is a reef dive located off Mataro, Spain, suitable for beginner divers. The site features a rocky structure reaching depths between 18 and 20 metres, with an average depth of 19 metres. Access is by boat, and divers typically experience mild currents. Visibility at the site can vary, so checking local reports before departure is recommended. Water temperatures fluctuate significantly throughout the year, ranging from 13C in winter to 24C in late summer. Species recorded around this area include Mediterranean moray, common octopus, marbled electric ray, great barracuda, various wrasses, scorpionfish, and sea stars, alongside several nudibranch and flatworm species.

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.