Lee Breakwater in Portland is a sheltered shore dive and snorkel site featuring an artificial reef and kelp forest. Located on the north side of the breakwater, the site is protected from southerly and westerly swells, offering generally calm conditions. Divers and snorkellers can explore depths ranging from 1 to 10 metres, with an average depth of 5 metres. Entry is from the shore, with the main structure located 20 metres out. Due to its status as an active harbour, boat traffic is a constant hazard; a dive flag is essential. Divers should also remain vigilant for fishing lines to avoid entanglement. Facilities include parking, toilets, and changing rooms.

Nunn's Beach in Portland is a sheltered shore dive featuring a reef and wall system. The site is protected from southerly and westerly winds by the adjacent breakwater, providing a calm environment for beginners. Depths range from 3 to 10 metres with an average of 6 metres. Visibility fluctuates between 4 and 20 metres, with calmer mornings often offering the clearest conditions. Divers should remain aware of boat traffic and potential entanglement hazards from fishing lines near the breakwater. On-site facilities include parking, toilets, showers, and changing rooms, allowing for a convenient entry and exit.

The Emily S is a wreck and artificial reef located 350 metres offshore from Portland, Australia. The site features the wreck structure alongside a wall section that provides topographic variety. Divers can expect depths ranging from 18 to 24 metres, with visibility varying between 10 and 30 metres. Conditions are generally mild with little current, though the site is suited for intermediate divers due to the depth and potential for entanglement. Access is by boat only, and divers should be aware of boat traffic in the area. A torch is recommended for exploring shadowed sections of the wreck. Facilities including parking, toilets, showers, and changing rooms are available nearby.

Lawrence Rocks Bay in Portland, Australia, is a boat-access site featuring a combination of reef and wall topography. Divers can explore depths ranging from 6 to 20 metres, with an average depth of 12 metres. The site is exposed to swell from the Southern Ocean, which can create significant surge, particularly near the wall structures. Visibility typically ranges between 10 and 20 metres. Due to the potential for surge and the presence of crayfish pot lines, this site is best suited for intermediate divers. Boat access is required to reach the site, which is located 2400 metres from the shore.

Bridgewater Beach in Portland offers a shore-entry reef dive suitable for beginners. The site features depths ranging from 12 to 21 metres, with visibility typically between 12 and 21 metres. Divers should exercise caution, as the eastern end of the beach contains strong, permanent rip currents. The western side provides calmer water and gentler waves. Water temperatures remain cool, ranging from 14C to 18C, necessitating appropriate thermal protection. Species recorded around this area include long-nosed fur seals, elephant sharks, sea stars, abalone, and snails. Whales are occasionally sighted during the summer months. Parking is available at the site, though no rinse facilities are provided.