Cedar Beach in the Long Island Sound is a shore-entry reef site suitable for beginners. Divers can explore depths ranging from 2 to 15 metres, with an average depth of 15 metres. Conditions vary, with visibility between 2 and 15 metres and moderate currents. Water temperatures fluctuate significantly throughout the year, ranging from 3C in February to 21C in August. Typical dive times are approximately 40 minutes. The site supports a variety of temperate marine life and invertebrates typical of the region. Due to the location, divers should remain aware of boat traffic. Parking is available at the site, and guided tours are offered for those requiring assistance.

Shoreham Jetties is an artificial reef located in the Long Island Sound, featuring a jetty structure with pilings and rocky surfaces. This site is suitable for beginner divers, with depths ranging from 3 to 5 metres. Entry is from the shore, requiring navigation through surf and shore break. Divers should be prepared for mild currents, though stronger or rip currents can occur. Visibility typically ranges from 1 to 3 metres. Night diving is permitted at this location. Parking is available on site. Divers are advised to wear protective gear to avoid contact with sharp rocks and to be aware of potential entanglement risks.

Smithtown Reef is an artificial reef and wreck site located in the Long Island Sound. The site sits at depths between 9 and 12 metres, with an average depth of 11 metres. It is accessible only by boat and is suitable for beginner divers. Conditions include mild currents and variable visibility ranging from 5 to 15 metres. Divers should maintain awareness of potential entanglement hazards when navigating the artificial structures and wreck elements. Typical dive times are approximately 40 minutes. Water temperatures fluctuate significantly throughout the year, ranging from 3C in February to 23C in August.

Roanoke Point Ships is a shallow wreck site located in Long Island Sound, suitable for beginner divers. The wreckage lies at depths between 3 and 6 metres, approximately 50 metres from the shore. Divers can access the site via boat or a shore entry, though caution is required due to potential surf and shore break at the beach. Visibility ranges from 10 to 30 metres, though conditions can change rapidly. Water temperatures fluctuate significantly throughout the year, ranging from 4C to 22C, necessitating appropriate thermal protection. While the current is generally mild, it can increase, requiring divers to monitor local conditions closely before entering the water.

Penfield Lighthouse in the Long Island Sound is an artificial reef site suitable for intermediate divers. The site features depths ranging from 6 to 10 metres, with an average depth of 7 metres. Access is via shore, though the site is located 1770 metres from the coast. Divers should be prepared for strong currents and variable visibility between 2 and 6 metres. Water temperatures fluctuate significantly throughout the year, ranging from 3°C in February to 22°C in August. Hazards at this location include boat traffic, entanglement risks, and surf. Facilities available near the site include parking and a cafe. Typical dive times at this location are approximately 45 minutes.

Orbit is a combined reef and wreck site located in the Long Island Sound. Divers can explore depths ranging from 6 to 26 metres, with an average depth of 18 metres. Access is strictly by boat, and the site is suited for intermediate divers due to moderate currents and variable visibility between 1 and 5 metres. Water temperatures fluctuate significantly throughout the year, ranging from 3C to 20C, necessitating appropriate thermal protection. Given the low visibility and potential for entanglement within the wreck structures, divers should maintain close proximity to their team and carry a torch and compass. Air fills and equipment rental are available locally.

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.

Green Ledge Lighthouse in Long Island Sound serves as an artificial reef, providing a distinct diving environment around the lighthouse structure. The site reaches depths between 3 and 21 metres, with an average depth of 3 metres. Access is exclusively by boat, as the location sits 1609 metres from the shore. Divers should anticipate moderate currents and remain cautious of boat traffic and potential entanglement hazards. The habitat supports a variety of temperate marine life, including reef fish and invertebrates typical of the region. Due to the prevailing conditions and navigation requirements, this site is suited for intermediate divers.