Dive Site: Tres Cocos

About Tres Cocos

Tres Cocos is a popular dive site situated north of San Pedro on Ambergris Caye, offering quick access from shore. It forms part of the Belize Barrier Reef, the second-largest barrier reef globally, characterized by its distinctive spur-and-groove formations. The topography here consists of coral spurs that typically crest between 50 and 80 feet, separated by sand-floored canyons that rapidly descend to depths of 110 feet. These canyons run perpendicular to the main reef line, creating a dynamic underwater landscape of deep and sometimes narrow cuts. Marine life commonly observed includes harlequin bass, trumpetfish, and dusky damselfish amongst the corals, while yellowtail snapper, grey angelfish, bar jacks, and black durgeon hover in the water column or within the canyons. Encounters with barracuda, green moray eels, and spotted eagle rays are also possible, particularly given the site's currents. Diving at Tres Cocos often involves a drift along the dramatic canyons. While generally accessible, the site's strong currents can make it more challenging, thus it is often recommended for divers with some experience. The mooring buoy, located just beyond the reef's protection, ensures reliable access even on days with rougher surface conditions.

Dive site facts: Tres Cocos

Depth

50-110 ft (15-34 m)

Current

Strong

Visibility

Excellent, up to 100 ft (30 m)

Water temperature

79-84°F (26-29°C)

Entry

Boat from mooring buoy

Level

Intermediate to Advanced

Dive type

Reef, drift, canyon

Region / port

Ambergris Caye, Belize

Coordinates

17.2985° N, 87.8841° W

Conditions & Currents

Tres Cocos is recognized for its strong currents, making it an excellent location for drift diving. These currents can present a challenge, implying that divers should possess some experience to comfortably navigate the site. Visibility at the site is generally excellent, often reaching 30 meters or more. Water temperatures are consistently warm, averaging around 27°C (80°F) throughout the year, meaning thermoclines are generally not a concern. Entry is typically from a boat to a mooring buoy. Divers should be prepared for active water movement, planning their gas consumption and drift trajectory carefully, with the dive master's briefing on current strength and direction being crucial for a safe and enjoyable dive.

Marine life & sighting chances

Harlequin bass

common

Trumpetfish

common

Dusky damselfish

common

Yellowtail snapper

common

Grey angelfish

common

Bar jacks

common

Black durgeon

common

Barracuda

occasional

Green moray eel

occasional

Spotted eagle rays

occasional

Parrotfish

common

Squirrelfish

common

Dive profile & how the dive runs

Dives at Tres Cocos typically begin with a boat entry at a permanent mooring buoy, positioned just beyond the main reef line to assist with surface conditions. Divers then descend into the spur-and-groove reef system, characterized by coral formations cresting at 50 to 80 feet, flanked by sand-floored canyons that quickly drop to around 110 feet. The dive usually progresses as a drift, following the direction of the strong currents through these deep and narrow canyons that run perpendicular to the reef. This allows for observation of reef fish along the coral spurs and pelagic species in the open water. The turning point is often determined by gas consumption or dive time, rather than a specific landmark, given the drift nature. Safety stops are typically performed in shallower areas of the reef structure, often between 15 and 20 feet, before surfacing for a boat pickup.

Underwater photography

Tres Cocos offers excellent opportunities for both wide-angle and macro photography. For wide-angle shots, a fisheye or wide-angle lens is ideal to capture the dramatic spur-and-groove formations and deep canyons. Visibility often exceeds 30 meters, making it suitable for capturing expansive reef scenes. Consider strobes to bring out the vibrant colors of the coral and fish in deeper sections or during overcast conditions. For macro enthusiasts, explore the ledges and crevices within the coral spurs for smaller creatures like harlequin bass and damselfish. Buoyancy control is paramount, especially when navigating currents, to avoid disturbing the fragile coral environment. Maintain a respectful distance from marine life, particularly if you encounter any larger pelagics like eagle rays, to avoid startling them.

Combine with nearby dive sites

• Tackle Box Canyons

  Features deep, narrow canyons with vertical walls and a short tunnel.

• Victoria Tunnels

  Known for impressive tunnel diving within large canyon formations.

• Cypress Canyons

  Similar spur-and-groove reef with specific coral growth like elkhorn and staghorn.

• Hol Chan Marine Reserve

  A protected marine park, excellent for beginners and snorkelers with abundant marine life.

• Tuffy

  Features sandy slopes and patch reefs teeming with marine life, ideal for beginner to intermediate divers.

• Esmeralda

  Known for hard coral ridges extending into deep canyons, with a resident green moray eel and nurse sharks.

Getting there & logistics

Diving Tres Cocos typically originates from Ambergris Caye, with San Pedro serving as the primary departure point. The dive site is notably close, requiring only a five-minute boat ride from San Pedro. Travelers to Belize generally fly into Belize City International Airport (BZE). From there, connections to Ambergris Caye are usually made via short domestic flights or water taxis. Dive excursions to Tres Cocos are often part of day trips or shorter two-tank dives, rather than extended liveaboard itineraries, given its proximity to shore. While marine park fees are common for protected areas in Belize, the sources do not explicitly state a specific fee for Tres Cocos; however, divers should confirm with their chosen operator as fees are often included in dive packages.

Safety & environment

For dive safety in Belize, including Tres Cocos, the nearest recompression chamber is located in San Pedro on Ambergris Caye. Evacuation in a dive emergency would typically involve rapid transport to this facility. Divers are strongly advised to carry comprehensive dive insurance that covers emergency medical treatment and evacuation. Site-specific hazards at Tres Cocos include strong currents, which necessitate good buoyancy control and awareness of one's position relative to the reef and other divers. Divers should strictly adhere to their dive guide's instructions regarding entry points, drift direction, and any specific safety protocols for managing currents. Always dive within your certified limits and be prepared to end a dive early if conditions exceed your comfort or skill level.

Who it suits — and who it doesn't

FAQ

Tres Cocos FAQ

Liveaboards diving Tres Cocos

These liveaboards may visit Tres Cocos on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Belize Aggressor IV

Belize

20 guests42.1 m

$356/day

Belize Aggressor III

Belize

18 guests33.5 m

$336/day