Fort Frederic, located off Pigeon Island, features a combination of natural and artificial reef structures. Divers can explore this site at depths ranging from 10 to 19 metres, with an average depth of 15 metres. The site is accessible only by boat and is suitable for beginners due to the mild currents. Water temperatures remain warm, between 27 and 30 degrees Celsius throughout the year. Visibility can be variable, so it is recommended to check local conditions before heading out. Divers should remain vigilant for fishing nets and debris, as well as boat traffic when surfacing. Protective footwear is advised to avoid injury from sharp coral and rocks.

Klathipa Deep is a pinnacle and reef site located off Pigeon Island, Sri Lanka. The topography features a rock formation starting at a depth of 18 metres and extending down to 40 metres or deeper. Access to this site is by boat only. Divers should be prepared for variable conditions, as the site is subject to strong currents. Visibility typically ranges between 10 and 25 metres. Due to the depth and potential for strong currents, this site is suited for intermediate divers. Water temperatures remain consistent throughout the year, generally between 27 and 29 degrees Celsius.

Life Saving Point Reef, located at Pigeon Island, is a shallow reef site reaching a maximum depth of 10 metres. Suitable for beginners and training, the site offers calm conditions with mild currents and visibility ranging from 8 to 15 metres. Access is available via both shore and boat entries, making it a practical location for introductory dives and open water courses. The site is also accessible for night diving. Water temperatures remain consistent throughout the year, typically between 27C and 30C. Divers should be aware of the presence of stonefish in the area.

Middle Reef is a boat-accessible site located off Pigeon Island, Sri Lanka. The reef features depths ranging from 8 to 19 metres, with an average depth of 12 metres. Divers can expect mild currents and visibility between 8 and 30 metres. The site is suited for intermediate divers, with typical dive times lasting 45 minutes. Water temperatures remain consistent throughout the year, ranging from 27C to 30C. Access to this site requires a boat. Snorkelling is not recommended at this location, as it holds a rating of 1 out of 5.

Navy Island is a reef site located 1000 metres from the shore of Pigeon Island, Sri Lanka. This site is accessible only by boat and is suitable for beginners. Divers and snorkellers can explore depths ranging from 5 to 15 metres, with an average depth of 9 metres. Conditions are generally calm with mild currents and visibility typically between 10 and 25 metres. Water temperatures remain warm throughout the year, fluctuating between 27C and 30C. Hazards at this location include boat traffic, lionfish, and stonefish. The site features a mix of hard and soft corals, providing a habitat for various reef fish and invertebrates.

Navy Reef, located off Pigeon Island, is a shallow reef site with a consistent depth of 7 metres. It is well-suited for beginner divers, offering mild currents and visibility that can reach 30 metres. Access to the site is strictly by boat. The reef is suitable for both day and night diving, providing ample natural light for observation. Divers should exercise caution regarding stonefish, which are present on the reef. It is recommended to wear closed-toe fins or boots and to consult with boat operators regarding specific hazards before entering the water.

Hospital Reef is a shallow dive site located off Pigeon Island, Sri Lanka, within the calm waters of Dutch Bay. Reaching a maximum depth of 10 metres, the site is well-suited for beginners, shore dives, and foundational training. Divers can expect minimal currents and a relaxed environment throughout the year. Water temperatures at the site range from 27C to 30C depending on the month. Access to the reef is available via both shore and boat entries, providing a convenient location for those looking to build confidence in a controlled marine setting.

The Navy Underwater Dive Museum near Pigeon Island is an artificial reef site established in 2020. It features two sunken gun boats and various military equipment placed on the seabed. The wrecks are non-penetrable but feature small openings for viewing. The site sits at depths between 12 and 23 metres, with an average of 18 metres. Access is by boat, located 500 metres from shore. Divers encounter mild currents and visibility ranging from 5 to 30 metres. Water temperatures remain warm, between 27C and 30C. Species recorded around this area include wrasses, Moorish idols, and various butterflyfish. Hazards include sharp coral and stonefish.