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.

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.

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.

Sag Harbor Jetties is an artificial reef located 350 metres from shore in the Long Island Sound. The site features depths ranging from 3 to 12 metres, with an average depth of 3 metres, making it suitable for beginner divers. Divers can expect mild currents and visibility between 5 and 10 metres. The jetty structure provides habitat for various reef fish and invertebrates typical of the region. Due to active boat traffic in the area, divers must remain vigilant near the surface and are advised to tow a surface marker buoy. Water temperatures fluctuate significantly throughout the year, requiring appropriate thermal protection.

Duck Pond Point is a shallow reef site in Long Island Sound, offering a drift dive experience suitable for beginners. Located 200 metres from the shore, the site features depths between 3 and 5 metres with an average of 3 metres. Divers should be prepared for a surf break at the shore entry point and moderate currents throughout the dive. Visibility typically ranges from 3 to 5 metres. The habitat supports a variety of temperate reef fish and invertebrates. Parking is available on-site, and the average dive duration is 54 minutes. Always assess entry conditions carefully before crossing the shoreline.

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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.

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.