Rocky Point in the Long Island Sound features a combination of natural and artificial reef structures. Divers can explore this site at depths ranging from 5 to 18 metres. Access is available via both shore and boat entries. Conditions include mild currents, though divers should be prepared for surge and swell upon entry. Visibility typically ranges between 5 and 15 metres but can shift rapidly during a dive. Water temperatures fluctuate significantly throughout the year, ranging from 4C to 18C, necessitating appropriate thermal protection for the season. The site is suited for intermediate divers, with typical dive times around 40 minutes.

Ocean Beach is a shore-entry snorkel site located in the Long Island Sound. The site features a reef area accessible directly from the beach. Water temperatures fluctuate significantly throughout the year, ranging from 5C in the winter months to 22C during the summer. Snorkellers should be aware of the physical hazards present at this location, including a surf and shore break at the entry point. Strong currents and rip currents are also common, requiring careful monitoring of local conditions before entering the water. Facilities available on site include parking, toilets, and a cafe for post-snorkel refreshments.

Secret Beach in the Long Island Sound offers a shallow reef and kelp forest environment suitable for beginners. Divers and snorkellers can expect an average depth of 3 metres, with visibility ranging from 2 to 9 metres. Entry is via the shore, and the site is accessible for both diving and snorkelling activities. Due to the nature of the location, divers should remain aware of boat traffic in the area. Water temperatures fluctuate significantly throughout the year, ranging from 4C in February to 22C in July and August. The habitat supports a variety of temperate marine life typical of the region, including various reef fish and invertebrates.

Greenport Jetty is an artificial reef located in the Long Island Sound, offering shallow depths between 3 and 5 metres. This site is suitable for beginners and snorkellers, with both shore and boat access available. Visibility typically ranges from 5 to 10 metres, and the area experiences mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 4C to 22C, requiring appropriate thermal protection. Divers should maintain high vigilance for boat traffic near the entry point and deploy a surface marker buoy. Be aware of jellyfish, which may congregate in the shallows during warmer months.

New London Ledge Lighthouse functions as an artificial reef located in the Long Island Sound. The site features a submerged foundation at depths ranging from 1 to 9 metres. Divers can expect visibility between 5 and 10 metres. Access is strictly by boat, and the site is suitable for beginners. Water temperatures fluctuate significantly, ranging from 5C in winter to 22C in summer, necessitating appropriate thermal protection. Moderate to strong currents are common, so divers should remain close to the structure. Guided tours are available and recommended to navigate the foundation safely and manage current conditions effectively.

Horton Pt is a shallow reef and artificial reef site located in the Long Island Sound. Divers can explore depths between 3 and 5 metres, making it suitable for intermediate divers who possess solid buoyancy and navigation skills. The site is accessed via a shore entry, which requires caution due to surf and potential shore break. Conditions include moderate currents and visibility ranging from 1 to 5 metres. Water temperatures fluctuate significantly throughout the year, from 4C in winter to 22C in summer. Divers should be aware of entanglement risks around the artificial structure and the presence of sharp rocks and coral near the surface. Parking is available at the site.

Brownstone Quarry is a freshwater artificial reef site located in the Long Island Sound area. Divers and snorkellers can access the water via the shore. The site features depths ranging from 5 to 30 metres, with an average depth of 5 metres. Visibility typically fluctuates between 3 and 9 metres. Divers should be aware of significant thermoclines throughout the water column and potential entanglement hazards. The site is suitable for beginners and supports night diving. On-site facilities include parking, toilets, changing rooms, air fills, equipment rental, a cafe, and gear storage. The habitat supports various temperate freshwater fish and invertebrates typical of the region.

Brownstone Exploration and Discovery Park is a quarry dive site in the United States featuring an artificial reef structure. The site offers a controlled, current-free environment suitable for beginners, with depths ranging from 7 to 34 metres. Divers can choose to remain in the shallower sections or explore deeper areas depending on their certification limits. Visibility at the site typically ranges between 5 and 10 metres. Shore entry makes logistics straightforward, and the park provides full facilities including equipment rental, changing rooms, and a cafe. Divers should monitor their depth gauges closely to avoid exceeding planned limits, as the site reaches depths of up to 34 metres.