The Gwendolyn Steers is a shipwreck located 2000 metres off the coast of Long Island in the Long Island Sound. Resting at depths between 6 and 30 metres with an average of 15 metres, this artificial reef is accessible only by boat. Divers encounter mild currents, though visibility is variable, ranging from 5 to 15 metres. The site requires intermediate skill due to potential surge and swell, particularly in the shallower sections. Boat traffic is frequent in the area, necessitating the use of a surface marker buoy during ascents. Guided tours and boat charters are available through local dive shops to support site planning and access.

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.

Lloyd Neck is a shallow reef site in Long Island Sound, offering a shore entry suitable for beginner divers. The site features depths ranging from 2 to 6 metres with visibility typically around 5 metres. Divers should be aware of moderate currents that can strengthen, requiring careful planning to enter against the flow. Water temperatures fluctuate significantly throughout the year, ranging from 3C in winter to 23C in summer, necessitating appropriate thermal protection. Due to frequent boat traffic in the area, divers must use high visibility markers at all times. Parking is available on-site, though visitors should check local boating schedules as traffic increases during weekends and warmer months.

Bayville Barge is a shore-accessible wreck site located in the Long Island Sound. The structure sits at depths between 20 and 25 metres, providing a manageable wreck experience for beginners. Divers encounter mild currents, though visibility is highly variable, ranging from 2 to 30 metres. Due to the potential for low visibility and boat traffic, the use of a surface marker buoy is essential. Water temperatures fluctuate significantly throughout the year, from 3C to 20C. The site features a mix of wreck and muck topography, with kelp growth present on the structure. Divers should remain aware of the presence of sharks when exploring the wreckage.

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.

Prybil Beach is a shore-entry reef dive in Long Island Sound with a maximum depth of 8 metres. This site is suitable for beginners, though conditions require careful planning due to moderate currents and variable visibility. Divers should remain alert for boat traffic when entering and exiting the water. The reef environment supports a variety of temperate marine life and invertebrates typical of the region. Water temperatures fluctuate significantly throughout the year, ranging from 5C in winter to 22C in summer. Divers are advised to check local visibility and current reports before planning a dive, as these factors can change the site's accessibility.

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.