The Halftime is an artificial reef wreck located in the Long Island Sound, United States. Resting at depths between 18 and 25 metres, with an average depth of 21 metres, this site is strictly for advanced divers. Access is by boat only, situated 25 kilometres from shore. Divers must manage moderate currents during descent and ascent. The wreck structure presents a significant risk of entanglement, requiring careful navigation and appropriate safety gear. Water temperatures fluctuate between 5C and 18C throughout the year. Due to the nature of the site and potential for variable conditions, divers should maintain high situational awareness at all times.

Ponquogue Bridge is a shore-accessible drift dive site located in Hampton Bays. The site features an artificial reef structure beneath and around the bridge, with depths ranging from 0 to 10 metres and an average depth of 5 metres. Divers should be prepared for strong currents and variable visibility between 2 and 10 metres. Due to the nature of the location, hazards include boat traffic, potential entanglement, and surf. This site is suited for intermediate divers, with typical dives lasting around 35 minutes. Parking and toilets are available, though seasonal parking permits are required for access.

The Mandy Ray Wreck is a deep-water site in the Long Island Sound reaching depths of 34 metres. This advanced dive requires boat access and involves navigating moderate currents and cold water temperatures ranging from 5 to 17 degrees Celsius. Divers must manage entanglement risks within the wreck structure and remain vigilant of active boat traffic during ascent. A surface marker buoy is essential for safety when surfacing. Due to the depth and thermal conditions, appropriate drysuit or heavy wetsuit protection is required. Species recorded around this area include gurnard, pufferfish, barracuda, spotfin butterflyfish, horseshoe crab, wrasses, groupers, toadfish, sea bass, crab, lizardfish, righteye flounder, common sea star, and temperate bass.

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.

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.

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.

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.

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.