Obi is a shallow shore dive located in Long Island Sound, suitable for beginner divers. The site maintains a consistent depth of approximately 3 metres. Water temperatures fluctuate significantly throughout the year, ranging from 5C in February to 24C in July. As a marine environment, the habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region. Due to the shallow nature of the site, it is accessible for entry directly from the shore. Divers should be prepared for variable conditions typical of this coastal area.

Shipwreck Cove in the Long Island Sound features a combination of a shipwreck and an artificial reef structure. Located 1609 metres from shore, the site sits at depths between 7 and 13 metres, with an average depth of 10 metres. Conditions are suitable for beginners, though divers must navigate mild currents and variable visibility ranging from 2 to 15 metres. Hazards include potential entanglement in wreckage, sharp edges on structures, and active boat traffic overhead. Divers should use a surface marker buoy upon ascent. Due to water temperatures fluctuating between 5 and 20 degrees Celsius, appropriate thermal protection is required, with drysuits or thick wetsuits recommended outside of the summer months.

Hylton Castle is a wreck site located in the Long Island Sound, requiring boat access due to its distance of 24 kilometres from the shore. This advanced dive site features a consistent depth of 30 metres. Divers should be prepared for moderate currents and visibility ranging from 3 to 15 metres. Water temperatures fluctuate between 5C and 19C, with warmer conditions occasionally influenced by the Gulf Stream during summer months. Hazards at this location include boat traffic, cold water, deep conditions, potential entanglement, strong currents, and sharks. Dives typically last around 30 minutes.

The USS San Diego is an artificial reef wreck located in the Long Island Sound. Resting at depths between 20 and 35 metres, this site is suited for advanced divers with wreck certification. Access is by boat only, situated approximately 21.7 kilometres from shore. Divers should be prepared for moderate currents and variable visibility ranging from 3 to 18 metres. Water temperatures fluctuate between 5°C and 18°C, necessitating a drysuit or a 7mm wetsuit with a hooded vest. Due to the depth and potential for nitrogen narcosis, careful bottom time management and redundant lighting are essential for navigating this challenging wreck.

The Iberia is a shipwreck located in Long Island Sound, situated approximately 4828 metres from shore. The site lies at depths ranging from 13 to 18 metres, with an average depth of 18 metres. The wreckage is split, with the sterncastle and rudder resting on the sea floor at a distance from the main section. Access to this site requires a boat. Divers should be prepared for variable currents and low visibility, which typically ranges between 3 and 5 metres. Given the depth, potential for entanglement, and overhead environment, this site is suited for intermediate divers. Night diving is permitted at this location.

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.

Beach 8th Street in the Long Island Sound offers a varied underwater environment featuring muck, artificial reef, and natural reef sections. Divers navigate between four dive cages connected by marked lines, reaching depths of 5 to 6 metres with an average of 4 metres. This shore entry site is suitable for beginners, though conditions require careful planning as currents can be strong and visibility fluctuates between 1 and 6 metres. Divers must use a dive flag and plan for high slack tide. Hazards include boat traffic, entanglement risks, and jellyfish. Facilities at the site include parking and toilets, with typical dives lasting 60 minutes.

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.