Dive Site: Cay Bay Reef

About Cay Bay Reef

Cay Bay Reef in St. Maarten offers a welcoming dive experience for all levels, situated in a sheltered area ideal for tranquil exploration. This shallow reef boasts a rich variety of corals and is complemented by the remains of a 20-meter freighter vessel lying nearby. Divers can expect a visually engaging underwater landscape with ample opportunities to observe local reef inhabitants. The reef is characterized by its relatively shallow depths, making it highly accessible and illuminated by natural light, which enhances its vibrant colors. The underwater terrain is a mix of lush coral formations and the intriguing wreck of the freighter, creating diverse habitats for marine species. It serves as an excellent site for both novice divers gaining confidence and experienced divers looking for a peaceful, biodiverse environment. Marine life here includes a host of tropical reef species, with frequent sightings of various fish. The sheltered nature of the site also makes it a reliable option when other locations might be affected by rougher weather, ensuring consistent dive conditions. The clarity of the water typically offers excellent visibility, allowing for clear views of the reef and its inhabitants. This dive site provides a comfortable and rewarding experience. Its ease of access, combined with its sheltered conditions and the presence of both natural reef and wreck elements, makes it a popular choice. It's a prime example of St. Maarten's accessible and surprisingly vibrant reef diving, emphasizing a leisurely pace of exploration.

Dive site facts: Cay Bay Reef

Depth

9 m

Typical dive

9 m, 45-60 min

Current

Mild

Visibility

10–30 m

Water temperature

26–30°C

Entry

Boat

Level

Beginner

Dive type

Reef, Wreck

Night dive

Possible

Region / port

St. Maarten

Coordinates

18.02, -63.12

Conditions & Currents

Currents at Cay Bay Reef are generally mild, making it an ideal site for less experienced divers and for those seeking a relaxed underwater environment. The sheltered location further contributes to calm water conditions, even when other parts of the island experience rougher seas. Visibility is typically good, ranging from 10 to 30 meters, which allows for clear views of the reef and wreck. Divers can anticipate a straightforward boat entry and exit, facilitated by the calm surface conditions. Buoyancy control remains important to protect the delicate coral formations, despite the lack of strong currents. The minimal current also helps conserve air, allowing for longer bottom times and extended exploration of the site's features. This gentle environment ensures a comfortable and unhurried dive experience.

Marine life & sighting chances

Tropical reef fish

common

Caribbean reef shark

occasional

Nurse shark

occasional

Loggerhead turtle

occasional

Green turtle

occasional

Hawksbill turtle

occasional

Grouper

occasional

Stingray

occasional

Barracuda

occasional

Angelfish

common

Parrotfish

common

Pufferfish

occasional

Trumpetfish

common

Seahorse

rare

Dive profile & how the dive runs

Your dive at Cay Bay Reef typically begins with a boat entry, followed by a descent onto the shallow reef, which reaches a maximum depth of 9 meters. You'll start by exploring the vibrant coral gardens, where various hard and soft corals create a colorful habitat. The dive route often includes a visit to the nearby 20-meter freighter wreck, which now serves as an artificial reef, teeming with marine life. Visibility is usually excellent, allowing for clear views of the wreck's structure and the surrounding reef. Divers will circumnavigate the wreck, observing fish and other critters that have made it their home. The dive continues along the reef, maintaining a shallow depth, which is ideal for longer bottom times and relaxed observation. The turn point is determined by air consumption and time, ensuring ample gas for a safe ascent. Throughout the dive, pay attention to smaller reef creatures and the intricate details of the corals. Your safety stop will be conducted in the clear, shallow waters, typically around 5 meters, before a comfortable boat exit. The entire profile is designed to be calm and unhurried, suiting divers of all experience levels.

Underwater photography

Cay Bay Reef's shallow depths and excellent visibility make it an ideal location for underwater photography, particularly for wide-angle and macro shots. For capturing the expansive coral formations and the freighter wreck, a wide-angle lens is recommended to encompass the full scene. The natural light penetration at 9 meters is superb, often negating the need for external strobes unless you're aiming for vibrant color pop and shadow reduction. Macro enthusiasts will find plenty of subjects among the corals and within the wreck, such as small reef fish, crabs, and nudibranchs. Patience and good buoyancy control are crucial to avoid stirring up sediment and to get close to shy subjects without damaging the delicate reef. Consider using a snoot for dramatic lighting effects on macro subjects. Always maintain respectful distance from marine life and avoid touching or disturbing the environment to ensure natural behavior and pristine shots.

Combine with nearby dive sites

• Isabella

  The Isabella wreck in St.

• Man O'War Shoal

  Man O'War Shoal is an exceptional dive site located within the Man O'War Shoal Marine Park, the only protected marine area in Sint Maarten.

• Fish Bowl

  A large circular reef within the Marine Park, known for diverse fish and coral arches.

• Big Mama's Reef

  A shark diving site with Caribbean reef sharks, accessible to all levels.

• HMS Proselyte

  A popular wreck dive, an 1801 frigate covered in corals.

Getting there & logistics

To reach St. Maarten, you will typically fly into Princess Juliana International Airport (SXM). Dive operators are predominantly resort-based on the Dutch side of the island. Trips to Cay Bay Reef are generally part of daily dive excursions, usually involving boat transfers from various ports along the southern coast. Dive packages often combine this site with other nearby reefs and wrecks within the Man of War Shoal Marine Park. While most diving is day-trip based, some liveaboards, like the Caribbean Explorer II, include St. Maarten in their itineraries, often combining it with dives in Saba and St. Kitts. No specific permits are typically required for individual divers at Cay Bay Reef, as access is usually managed through dive centers. It's advisable to verify inclusions and potential marine park fees with your chosen dive operator.

Safety & environment

For diving in St. Maarten, including Cay Bay Reef, it is highly recommended to have comprehensive dive insurance, such as that provided by DAN, to cover any potential incidents. The nearest recompression chamber is not directly on St. Maarten, meaning any serious dive accident would necessitate medical evacuation, likely to a larger facility in a neighboring territory. Understanding evacuation procedures and having adequate insurance is therefore critical. Cay Bay Reef is considered beginner-friendly due to its shallow depth and mild currents, but standard safe diving practices, such as maintaining proper buoyancy, monitoring air consumption, and staying with your buddy, are always essential. Avoid contact with marine life and corals to prevent injury and protect the ecosystem. Always follow the dive brief provided by your guide, especially concerning entry and exit procedures, and depth limits.

Who it suits — and who it doesn't

FAQ

Cay Bay Reef FAQ

Liveaboards diving Cay Bay Reef

These liveaboards may visit Cay Bay Reef on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Caribbean Explorer II

St. Maarten

18 guests

$224/day