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 Oregon is a deep wreck dive located in the Long Island Sound, resting at depths between 25 and 40 metres. This site requires boat access and is suited for intermediate divers with advanced or deep certifications. Divers encounter strong currents and visibility ranging from 10 to 30 metres. The wreck features an overhead environment, necessitating caution regarding entanglement. Water temperatures fluctuate between 6C and 18C, requiring appropriate thermal protection. The structure supports various reef fish and invertebrates that have colonised the site over time. Divers should plan for slack water to safely explore the deeper sections of the wreck, and a surface marker buoy is essential.

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.

Democrat Point is an artificial reef located in the Long Island Sound. This site is suitable for intermediate divers, with an average depth of 5 metres. Access is available via both shore and boat entries. Divers should be prepared for variable conditions, including moderate to strong currents, surge, and low visibility. Hazards at this location include cold water temperatures, which can drop to 5C, as well as potential entanglement risks and rip currents. The habitat supports a variety of temperate marine life and invertebrates typical of the region. Parking facilities are available for visitors.

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.

12 Mile Reef is an advanced dive site located in the open waters of the Long Island Sound. This site features a combination of wreck structures and artificial reef materials that reach depths of up to 38 metres. Due to the depth and variable currents, this location is suitable only for advanced divers. Water temperatures range from 5C to 17C, necessitating the use of a drysuit or thick wetsuit. Divers should be aware of significant boat traffic in the area and must deploy a surface marker buoy during ascent. Visibility is highly variable, and carrying a torch is recommended for exploring the structure.

Sound Beach is a shallow shore dive in Long Island Sound, featuring a mix of natural and artificial reef structures. The site is suitable for beginners, with depths ranging from 3 to 6 metres and an average depth of 4 metres. Divers should be prepared for strong currents and variable visibility between 5 and 10 metres. Entry requires caution due to surf, shore break, and potential hazards including sharp rocks and sea urchins. Protective footwear is essential. The area experiences significant boat traffic, so maintain awareness during your dive. Facilities at the site include parking, toilets, showers, changing rooms, and a rinse station.

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.