Praia de Fuzelhas, located near the Siza Vieira tea house in Porto, offers a snorkelling experience defined by a labyrinth of rock formations. The site features deep gullies between these rocks, which provide shelter for marine life and support vibrant algae colonies. Snorkelling is conducted from the shore with depths typically ranging from 1 to 5 metres, averaging 3 metres. Conditions are generally suitable for beginners, though surf is a known hazard. Water temperatures are cool, ranging from 14C to 17C throughout the year. Facilities available at the site include parking, toilets, showers, and a cafe.

Pelo Negro Rocks is a complex rock formation located 500 metres off the coast of Porto, Portugal. This site features a diverse topography of reefs, walls, and canyons with vertical structures reaching up to 4 metres in height. Depths at the site range between 8 and 20 metres. Access is strictly by boat due to the distance from shore and the presence of moderate to strong currents. The water temperature remains cool throughout the year, typically fluctuating between 14C and 16C. Given the challenging current conditions, this site is recommended for advanced divers, though it is also rated for snorkelling.

Pelo Negro is a rocky reef located 1500 metres off the coast of Porto, Portugal. This site features a depth range of 8 to 20 metres, with an average depth of 15 metres. Divers must access the reef by boat. Conditions include mild but variable currents and visibility ranging from 5 to 30 metres. The water temperature remains cool, between 14 and 16 degrees Celsius throughout the year, necessitating appropriate thermal protection. Due to active boat traffic on the surface, divers should use a surface marker buoy during ascents. The reef topography consists of sharp, rocky structures requiring careful buoyancy control. This site is suitable for intermediate divers.

Vila do Porto in Portugal offers a diverse underwater environment featuring a wreck, natural reef, and artificial reef structures. Located 500 metres from the shore, the site sits at a depth of 8 to 12 metres, making it suitable for beginner divers. Divers experience mild currents and visibility ranging from 5 to 10 metres. Water temperatures fluctuate between 14 and 17 degrees Celsius throughout the year. Access is exclusively by boat to avoid surf at the entry point. The site supports night diving, with typical dives lasting 40 minutes. Divers should remain alert for boat traffic during ascents and carry a cutting tool due to the risk of entanglement.

Olo is a reef site located along the Costa Verde coastline north of Porto. The reef structure sits at depths between 10 and 20 metres, with an average depth of 15 metres. Conditions are characterised by mild currents and visibility ranging from 5 to 10 metres. Water temperatures remain between 14 and 16 degrees Celsius throughout the year, requiring a thick wetsuit. Access to this site is by boat only. Divers should remain aware of boat traffic at the surface and use a surface marker buoy. The site is suitable for beginner divers, though surf conditions can impact boat operations.

Porto de Leixões is a shallow reef site located in Porto, Portugal, offering depths between 2 and 7 metres with an average of 5 metres. This site is suitable for beginners, featuring mild currents and accessible entry points from both shore and boat. Divers should be aware of variable visibility, surge, and active boat traffic in the harbour area. Water temperatures range from 14 to 17 degrees Celsius, necessitating appropriate thermal protection. When entering from the shore, exercise caution regarding surf and shore break, and use protective footwear to navigate the shallow rocky areas. Always deploy a delayed surface marker buoy before ascending due to local vessel movements.

The Ruy Barbosa is a wreck site located 200 metres offshore from Porto, Portugal. Resting at depths between 9 and 15 metres, the site is suitable for beginner divers. The wreck structure is accessible via boat, with visibility typically ranging from 10 to 30 metres. Currents are mild, allowing for controlled exploration of the hull. Divers should exercise caution regarding sharp edges on the wreck and nearby rocky seabed sections. Water temperatures remain cool, between 14 and 17 degrees Celsius, necessitating a minimum 5mm wetsuit with a hood and gloves. Species recorded around this area include common octopus, wrasses, conger eel, sea stars, crabs, and various small reef fish.

U-1277 is a German World War II submarine resting upright on the seabed at a constant depth of 30 metres. Located over 3 kilometres from the shore of Porto, this wreck dive requires boat access. Divers experience visibility ranging from 5 to 20 metres and water temperatures between 14 and 16 degrees Celsius. Due to the depth and potential for strong currents, this site is suitable only for advanced divers. Maintaining neutral buoyancy is essential to avoid contact with the wreck structure. An SMB is strongly recommended for all divers to manage surface conditions and boat traffic in the area.