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.

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.

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.

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.

Nehalem North Jetty (River Side) is an artificial reef site located on the Oregon Coast. The rocky substrate of the jetty provides a habitat for various marine life. Divers should be aware of strong currents, surge, and boat traffic, with visibility often ranging between 2 and 8 metres. Depths at this site typically vary from 2 to 18 metres, with an average of 10 metres. Due to the challenging conditions, this site is suited for advanced divers. Snorkeling is possible but rated 2/5, and is only recommended during slack tide in calm conditions to avoid the hazards of the jetty bar.

Falcon Cove is a marine reef site located off the Oregon Coast near Arch Cape. The underwater topography consists of polished cobblestones and large basalt slabs. Divers can expect shallow depths ranging from 1 to 5 metres, with an average of 2 metres. Conditions are variable, featuring moderate currents, surge, and visibility between 3 and 10 metres. Marine life observed at the site includes Ochre Sea Stars and snails, alongside less frequent sightings of Monterey Dorids, Northern Leopard Dorids, Sea Nettles, Common Moon Jellyfish, and various crab species. Due to cold water, surf, and rip currents, this site is suited for intermediate divers. Shore entry is required.

Arch Rock is a marine reef site located at the southern end of Arch Cape beach, defined by a prominent sea stack featuring a natural arch. The topography consists of the base of the rock and surrounding boulder fields, which create crevices. This site is suitable for advanced snorkellers due to challenging conditions, including strong currents, surf, and low visibility. Water temperatures are consistently cold, ranging from 9 to 15C, necessitating the use of a wetsuit or drysuit. Shore access is available, and parking is provided for visitors. Due to the environmental hazards, this site requires careful planning and experience in cold water conditions.

Hug Point is a dramatic coastal site featuring sandstone caves and basalt reefs that become accessible at low tide. Snorkellers can explore the submerged portions of rocky fingers extending into the surf. The site is rated for intermediate snorkellers due to moderate currents and surf conditions. Shore entry is required, and visitors should be aware of hazards including rip currents, strong currents, and entanglement risks. Facilities at the site include parking, toilets, showers, changing rooms, and a rinse station. The water temperature varies between 9C and 15C throughout the year.