Nehalem Bay South Jetty provides a rocky habitat at the mouth of the river, accessible via a shore entry from the northern tip of Rockaway Beach. The site features a mix of artificial reef, natural reef, and kelp forest structures. Divers should be prepared for depths reaching 12 metres and variable visibility between 5 and 15 metres, which is best during incoming tides. Conditions are suited for intermediate divers due to strong currents, surge, and potential rip currents. Hazards include boat traffic, entanglement risks, and surf. Species recorded around this area include harbour seals, Steller sea lions, various nudibranchs, and ochre sea stars.

Neahkahnie Tide Pools are located at the northern end of Manzanita Beach, where the mountain base forms a series of rocky channels. This shallow reef site is suitable for beginners, with an average depth of one metre and a maximum of two metres. Access is via the shore, and the site features mild currents. Visibility typically ranges from five to fifteen metres. Water temperatures are cold year-round, ranging from 9C to 14C, necessitating the use of wetsuits. Hazards include cold water, rip currents, surge, and surf. Parking is available for visitors. The site is best suited for those comfortable with intertidal environments.

Roy Creek offers a freshwater snorkeling experience within the Nehalem River. The site is suitable for beginners and provides an opportunity to observe river ecology and crayfish. Access is via the shore, and currents are generally mild. Divers and snorkellers should be aware that conditions can be challenging due to cold water temperatures ranging from 9C to 14C, potential down currents, entanglement risks, and variable visibility that depends on recent rainfall. Given these environmental factors, the site requires careful preparation and awareness of local water conditions.

Barview Jetty is an artificial reef located at the mouth of the bay on the Oregon Coast. This advanced dive site features a rock wall structure that extends to depths of 14 metres. Divers and snorkellers should be prepared for strong currents, surge, and surf, as well as potential boat traffic in the area. Entry is via the shore. Facilities available at the site include parking, toilets, showers, changing rooms, and a rinse station. Due to the challenging conditions, this site is recommended for advanced divers. Snorkellers may explore the hook at the base of the jetty where the rock wall provides shelter.

The Three Graces is a series of sandstone sea stacks located between Garibaldi and Barview on the Oregon Coast. This site features rocky crevices and kelp-covered boulders, making it a notable location for both diving and snorkelling. Divers can expect depths ranging from 5 to 15 metres, with an average of 10 metres. Marine life frequently observed includes crabs, snails, and Ochre Sea Stars. Less common sightings include Northern Leopard Dorids, Barnacle-eating Dorids, Mottled Stars, and various shrimp. Due to moderate currents and potential hazards such as boat traffic, entanglement, and surf, this site is best suited for intermediate divers. Shore access is available with nearby parking.

Three Graces consists of massive sandstone pillars located off the Oregon Coast near Manzanita. This shore-entry site offers a reef environment with depths ranging from 2 to 18 metres, averaging 10 metres. Conditions are variable, with visibility between 2 and 11 metres and strong currents present. Due to cold water temperatures between 9 and 11 degrees Celsius, a drysuit or 7mm wetsuit is essential for all divers. The site is highly tide-dependent, and users should remain aware of hazards including surf, boat traffic, and low visibility. Parking is available for site access.

Pier's End is an artificial reef site located on the Oregon Coast, featuring a pier that extends 232 metres into the bay. Divers and snorkellers access the water via a concrete stairwell. The site is shallow, with an average depth of 2 metres and a maximum of 5 metres. Conditions include moderate currents, low visibility ranging from 3 to 6 metres, and cold water temperatures between 9C and 14C. Due to these factors and potential boat traffic, the site is best suited for beginners who are comfortable in cold, low-visibility environments. Species recorded around this area include various sea lions, seals, nudibranchs, jellyfish, crabs, and sea stars.

Short Sand Beach is a sheltered reef site located within Oswald West State Park on the Oregon Coast. The northern rocky edge near Blumenthal Falls provides protection from prevailing winds and features kelp patches. Snorkellers can expect depths ranging from 1 to 10 metres, with an average depth of 5 metres. Visibility reaches up to 12 metres, though conditions vary. Access is via the shore. The site is suitable for beginners, though users should be prepared for cold water temperatures between 9 and 14C, moderate currents, surf, and surge. Hazards include jellyfish, sea urchins, and low visibility. Facilities available include parking, toilets, showers, changing rooms, and a rinse station.