Cedar Island Ledge is a reef site located off Cape Ann, accessible only by boat. The reef structure ranges from 12 to 18 metres in depth, with an average depth of 15 metres. Divers encounter mild currents, though surge and swell conditions vary and require attention. Visibility typically fluctuates between 5 and 15 metres. Water temperatures are cold, ranging from 5C to 16C, necessitating appropriate thermal protection. Species recorded around this area include Gray Seals, Harbor Seals, Common Lobsters, various crabs, and wrasses. Due to boat traffic in the vicinity of the Isle of Shoals, divers should deploy a surface marker buoy before ascending.

Mingo Rock is a reef and drop-off site located off the Isle of Shoals. The topography features a wall that descends from 2 to 18 metres, with an average depth of 10 metres. Visibility at the site ranges from 10 to 30 metres, allowing divers to observe the drop-off from the shallower sections. Access is strictly by boat, as the site is located over 8 kilometres from shore. Conditions include moderate currents and potential surge, requiring careful monitoring of surface conditions before entry. Due to water temperatures ranging from 4 to 16 degrees Celsius, a drysuit or thick wetsuit is recommended for most of the year.

The Cut is a drift dive site located between Duck Island and Shag Rock in the United States. This reef site requires boat access and is situated approximately 24 kilometres from shore. Divers should be prepared for strong currents, surge, and low visibility, which typically ranges between 1 and 6 metres. The site reaches depths of 15 to 30 metres and is suited for intermediate divers. Species recorded around this area include gray seals, harbor seals, rock crabs, common lobsters, wrasses, righteye flounders, common sea stars, shrimp, pipefish, cod, snails, and European green crabs. Typical dives last 45 minutes in water temperatures ranging from 5C to 17C.

Duck Island is a shallow reef site located five miles off the coast of New Hampshire within the Isles of Shoals. This marine site is suitable for intermediate divers and requires boat access due to its distance from the shore. The average depth is three metres, with conditions characterised by moderate currents and cold water temperatures ranging from 4C to 19C throughout the year. Divers should be aware of potential hazards including boat traffic, strong currents, and surf. Typical dives at this location last approximately 60 minutes.

Fort Stark offers a shore-entry dive featuring a combination of reef and wall topography. The site is suitable for beginners, with depths ranging from 5 to 8 metres and an average depth of 7 metres. Divers navigate through areas of rockweed and kelp-covered boulders. Conditions include mild currents and visibility typically between 5 and 9 metres. Water temperatures fluctuate significantly throughout the year, ranging from 4C in February to 17C in late summer. Divers should remain aware of potential hazards, including boat traffic, entanglement risks, surf, and periods of low visibility. Parking is available at the site.

Cape Neddick Nubble features rocky ledges and drop-offs that provide varied topography for divers. This shore entry site is suitable for beginners, with depths ranging from 5 to 18 metres and an average depth of 10 metres. Conditions are variable, with visibility between 3 and 15 metres and mild currents. Divers should be aware of potential hazards including boat traffic, entanglement, sea urchins, surf, surge, and strong currents. The site is accessible for night diving, with typical dives lasting around 45 minutes. Facilities at the location include parking and toilets. Water temperatures fluctuate significantly throughout the year, ranging from 4C in February to 16C in August and September.

Halibut Point in Cape Ann is an advanced shore dive featuring a combination of natural reef, artificial structures, and a pronounced drop-off. The site ranges from 8 to 30 metres in depth, with an average of 18 metres. Divers must navigate strong currents and surge, making slack tide essential for a manageable dive. Entry is via the shore, where divers must contend with surf and swell. Due to cold water temperatures ranging from 5 to 15 degrees Celsius and challenging conditions, a drysuit is recommended. Visibility typically fluctuates between 5 and 10 metres. This site is strictly for advanced divers who are comfortable with significant depth changes and variable marine conditions.

Folly Cove in Cape Ann is a shore-entry dive site featuring a mix of reef and wall topography. Divers can explore depths ranging from the surface to 23 metres, with an average depth of 12 metres. The site is suitable for intermediate divers and supports night diving. Marine life observed at the site includes common rock crabs, righteye flounder, and snails. Less frequently, divers may encounter horseshoe crabs, torpedo rays, pufferfish, wrasses, common lobsters, opalescent inshore squid, pipefish, sea stars, and cod. Conditions vary, with visibility between 2 and 15 metres and mild currents. Hazards include cold water, surge, surf, boat traffic, and sea urchins.