About Siete Bocas
Cenote Siete Bocas, meaning "Seven Mouths," is a unique cavern dive site nestled along the Ruta de los Cenotes near Puerto Morelos in Mexico's Riviera Maya. Its name perfectly describes the seven natural openings in the ceiling, which allow magnificent shafts of sunlight to penetrate the immense underground chamber. This site offers a distinct experience compared to cenotes with long, winding passages, focusing instead on a vast, open space illuminated by these dramatic light beams and adorned with ancient limestone formations. The dive commences by entering through one of the seven openings, leading divers into a sprawling limestone dome. The ceiling is rich with stalactites, formed over millennia when the cavern was dry. As divers explore, the light show from the various angles constantly shifts, creating a dynamic and spectacular atmosphere. In deeper sections, certified divers might encounter a hydrogen sulfide cloud, alongside marine fossils embedded within the limestone walls, offering a glimpse into the region's ancient geological past. The water temperature consistently hovers around 24 to 25°C, providing a comfortable diving experience. Visibility is excellent, often exceeding 30 meters when undisturbed, ensuring clear views of the cavern's grandeur. Dives typically last between 45 to 60 minutes, guiding divers through the cavern route within the natural daylight zone. The site is generally less crowded than some of the more popular cenotes, offering a more authentic and wild ambiance. While accessible to Open Water divers under the right guidance, an Advanced Open Water certification with good buoyancy control is recommended for the recreational cavern route, which typically reaches a maximum depth of 15 meters. Experienced and qualified divers may explore deeper profiles, potentially reaching around 30 meters, where the hydrogen sulfide cloud can be observed. Dive profiles are tailored to diver certification and experience, with an emphasis on preserving visibility through careful movement.
Highlights
Seven natural light shaftsImmense underground chamberGiant stalactitesRemarkable sense of spaceUnderwater light showMarine fossils in limestoneHydrogen sulfide cloudAuthentic, uncrowded atmosphere
Dive site facts: Siete Bocas
- Depth
- 0–30 m
- Current
- No current
- Entry
- Shore / dayboat
- Level
- Intermediate
- Dive type
- Cave & cavern, Reef
- Region / port
- Mexico
- Coordinates
- 20.3511° N, 87.2859° W
Conditions & Currents
Cenote Siete Bocas offers calm diving conditions, as is typical for most cenotes in the region. There are no currents or waves within the cavern system, making it a very serene environment. Visibility is generally excellent, often exceeding 30 meters when undisturbed, but it is important for divers to maintain good buoyancy control to avoid stirring up fine sediment on the cavern floor. The water temperature remains a consistent 24 to 25°C year-round. Dives are conducted along a cavern route within the natural daylight zone, meaning divers always remain within sight of natural light and a clear exit. Guides provide thorough briefings on navigation, communication, and gas management, ensuring a safe experience in this overhead environment. Entry and exit are typically straightforward from one of the seven openings.
Why dive Siete Bocas from a liveaboard?
Siete Bocas is one of Mexico's signature dive sites. A liveaboard sleeps you on the water and puts you in the water for three to four guided dives per day, including dawn and night dives that day-boat operators rarely offer. You skip the daily commute back to port and reach quieter, less-crowded sites in the same region on a single trip.
Below are the liveaboards that include Siete Bocas on their Mexico itineraries.
Liveaboards diving Siete Bocas
These liveaboards may visit Siete Bocas on selected itineraries — the exact dive sites depend on departure, weather and conditions.
Nautilus Explorer
Mexico
25 guests44.8 m
$230/day
Valentina
Mexico
20 guests38.1 m
$430/day
Rocio del Mar
Mexico
20 guests33.5 m
$392/day
Nautilus Under Sea
Mexico
19 guests32 m
$261/day
Nautilus Belle Amie
Mexico
32 guests44.8 m
$299/day
Quino del Mar
Mexico
20 guests36 m
$392/day
Nautilus Gallant Lady
Mexico
12 guests35.36 m
$332/day
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© Esri — Maxar, Earthstar, GIS
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