Nautilus Liveaboards
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Mexico
Diving in San Benedicto Island (Revillagigedo)
2 sites114 species21–28 °C15–30 m vis
Photo: Harvey Clements / Pexels
San Benedicto Island is the most remote of Mexico's Revillagigedo archipelago — an uninhabited volcanic cinder cone 390 km southwest of Cabo San Lucas. Known as "Mexico's Little Galápagos," it is home to two of the world's most extraordinary dive sites: El Boiler, featuring the world's premier giant manta ray cleaning station where mantas actively seek divers for playful interaction, and El Canyon, renowned for massive schools of scalloped hammerhead sharks. Accessible exclusively by liveaboard from Cabo San Lucas, the island sits within Revillagigedo National Park — the largest fully protected marine reserve in North America at 148,000 km².
Revillagigedo National Park is the largest fully protected marine reserve in North America at 148,000 km².San Benedicto is an uninhabited volcanic cinder cone; a 1952 eruption reshaped the island and its underwater terrain.Giant oceanic mantas at El Boiler reach wingspans of over 7 meters (22+ feet).The Clarion angelfish is endemic to the Revillagigedo archipelago and cleans the visiting mantas at El Boiler.More than ten shark species patrol the archipelago, including the scalloped hammerhead schools famous at El Cañón.Humpback whales pass through between January and April, and divers can sometimes hear them singing underwater.Divers can photograph the mantas and submit their IDs to mantamatcher.com to help catalog individual animals.The island has no permanent fresh water, which is why it has never been inhabited.
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Conditions
21–28 °C
15–30 m
10–40 m
Strong
November to June (Revillagigedo liveaboard season), with peak big-animal encounters November to May.
| Month | Summary |
|---|---|
| Jan | January is prime liveaboard season with cooler water around 24-26°C; expect giant Pacific oceanic mantas at cleaning stations, schooling scalloped hammerheads, and humpback whales whose song is often audible underwater. |
| Feb | February brings world-class encounters for experienced divers, with oceanic mantas, hammerhead schools, and silvertip sharks amid strong currents; humpback whales are present and their song carries through the water. |
| Mar | March remains a peak month with cool water near 24-26°C, giant mantas, hammerheads, and Galapagos sharks; it is the tail end of humpback whale season, with songs still often heard underwater. |
| Apr | April offers excellent liveaboard diving as water gradually warms; oceanic mantas, schooling hammerheads, bottlenose dolphins, and silvertip sharks are reliable highlights for advanced divers. |
| May | May is late-season diving with warmer water and strong action from giant mantas and hammerheads; whale shark sightings become more likely as the season winds down. |
| Jun | Early June marks the close of the liveaboard season, with the best chance of whale sharks alongside oceanic mantas and sharks before operations pause for the summer. |
| Jul | July is off-season at San Benedicto: liveaboards do not operate during the summer hurricane season and heavy seas, so diving is not available this month. |
| Aug | August is off-season with no diving available; hurricane season and rough Pacific conditions keep all liveaboard operations suspended. |
| Sep | September remains off-season at this remote offshore site; liveaboards do not run during hurricane season, so diving is not offered this month. |
| Oct | October is the final off-season month; heavy seas and hurricane risk mean liveaboards stay closed and diving is unavailable until the season reopens. |
| Nov | November reopens the liveaboard season as conditions settle; early trips already deliver giant oceanic mantas, schooling hammerheads, and silvertip sharks for advanced divers. |
| Dec | December is excellent early-season diving with water cooling toward 24-26°C; expect oceanic mantas at cleaning stations, hammerhead schools, and bottlenose dolphins in strong currents. |
Dive Sites (2)
El Boiler
6–50m · Advanced
Shallow guyot · Flat mesa top · Sheer walls
El Canyon (El Cañón)
10–50m · Advanced
Deep vertical walls · Canyon formations · Two cleaning stations
Marine Life (114)
must-seeGreat Hammerhead
must-seeSpotted Eagle Ray
must-seeHawksbill Turtle
must-seeGreen Sea Turtle
must-seeAtlantic Bottlenose Dolphin
must-seeTownsend's Shearwater
Longspined Porcupinefish
Great Barracuda
Telja's Nudibranch
Socorro Serrano
Finespotted Moray
Jewel Moray
+102more species in the app
Dive shops
No dive shops are listed for this destination yet.
Liveaboards (6)
Guides
Top 2 Dive Sites at San Benedicto Island — Ranked
El Boiler and El Cañón — the two legendary dive sites of San Benedicto Island, ranked with depth, marine life, conditions, and practical details.
San Benedicto: Dive Guide to Mexico's Little Galápagos
The definitive guide to diving San Benedicto — two legendary sites, giant mantas, hammerhead schools, and 10-day liveaboard expeditions from Cabo San Lucas.
San Benedicto Dive Conditions: Seasons, Temps & Currents
Visibility up to 35 m, 21–28°C water, and strong drift currents. Here's exactly what San Benedicto's conditions look like month by month.
Safety
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