Platja de les Roques Blanques in Mataro is a shore-entry reef site featuring white rock formations that reflect sunlight across the seabed. The topography consists of a mix of sandy bottoms and rocky areas, suitable for beginners. Conditions are generally mild, though divers should be aware of potential surf and the presence of jellyfish. Water temperatures fluctuate between 13C and 26C throughout the year. Species recorded around this area include Mediterranean moray, common octopus, great barracuda, various wrasses, cow snails, flatworms, scorpionfish, and sea stars. Facilities at the site include parking, toilets, showers, a rinse station, a cafe, and equipment rental.

Rincón del Corsario in Mataro is a reef and wall site that descends to a maximum depth of 29 metres. This site is suited for advanced divers due to the depth and the requirement for precise buoyancy control along the wall. Visibility is variable, ranging from 5 to 30 metres, and currents are generally mild. Boat access is mandatory for this location. Water temperatures fluctuate between 13C and 21C throughout the year, necessitating appropriate thermal protection. Night diving is permitted, offering a different perspective of the reef structure. Local facilities provide air fills, equipment rental, and guided tours to assist with logistics.

Cala del Moro is a small, rocky cove situated between Arenys and Canet, north of Mataro. This site is suitable for beginners and offers shore access for snorkelling. Water temperatures fluctuate throughout the year, ranging from a low of 13C in February to a high of 26C in August. The site provides a straightforward entry point for those looking to explore the coastal environment. Due to its rocky topography, visitors should exercise caution when entering and exiting the water. The location is well-regarded for its accessibility and is a practical choice for those seeking a shore-based snorkelling experience in the region.

La Avioneta is a wreck dive located off Mataro, Spain, resting at depths reaching 37 metres. This site is strictly for advanced divers due to the significant depth and the requirement for precise buoyancy control. Access is exclusively by boat, and divers should be prepared for mild currents. Visibility at the site varies considerably, so checking local conditions before departure is essential. Water temperatures fluctuate between 13C and 20C throughout the year, necessitating appropriate thermal protection such as a drysuit or thick wetsuit. Divers must maintain strict depth monitoring and careful gas management plans throughout the dive to account for the depth of the wreck.

La Virgen is a marine dive site located off the coast of Mataro, Spain. The site features a consistent depth of approximately 10 metres. Water temperatures at this location vary throughout the year, ranging from a low of 13C in February to a high of 26C in August. Given the shallow and stable depth, the site is accessible for divers of various experience levels. Divers should be prepared for seasonal temperature fluctuations when planning their visits to this Mediterranean location.

La Pilona is an artificial platform located 450 metres offshore from Malgrat de Mar. Originally constructed for loading iron ore, the site now functions as an artificial reef. The underwater topography features a collection of concrete blocks and iron remains from the former structure. Snorkellers can explore these submerged remnants, which provide a complex habitat for marine life. Access to the site is possible by both shore and boat. Due to its offshore location and the nature of the structure, this site is best suited for intermediate snorkellers. Water temperatures in the area fluctuate significantly throughout the year, ranging from 13C in February to 26C in August.

Los Cubos is an artificial wreck site located off Mataro, Spain. The structure sits at depths reaching 25 metres, requiring advanced diving skills. Access is strictly by boat, and divers must remain vigilant regarding active boat traffic when surfacing. The site features mild currents, though visibility can shift significantly depending on local conditions. Divers should maintain precise buoyancy control to avoid contact with the artificial structure. Due to water temperatures ranging from 13 to 23 degrees Celsius, appropriate thermal protection is recommended, particularly during the cooler months. The wreck environment demands careful monitoring of depth gauges throughout the dive.

El Santuario is an artificial wreck site located off the coast of Mataro, Spain. The site reaches a maximum depth of 23 metres and is accessible only by boat. Divers encounter mild currents and variable visibility, requiring careful buoyancy control and awareness of wreck penetration hazards. The structure features various recesses and encrusted surfaces that provide shelter for marine life, including moray eels, conger eels, octopuses, crabs, seahorses, and nudibranchs. Due to the depth and the nature of the wreck, this site is suited for intermediate divers. A torch is recommended to inspect the darker areas of the hull and crevices effectively.