About Ultrafreeze
The Ultrafreeze, also known as El Frio, is a 200-foot cargo ship and tugboat deliberately sunk to form an artificial reef off the Caribbean coast of Quintana Roo, Mexico. It rests in Bahia de Mujeres, situated between Cancun and Isla Mujeres, approximately 7 miles southeast of Isla Mujeres. The vessel caught fire while docked at Isla Mujeres, sustaining severe damage that rendered it unseaworthy before its sinking in 1979. Today, the Ultrafreeze lies upright at depths ranging from 85 to 100 feet (26 to 30 meters). Its hull remains largely intact, though Hurricane Andrew in 1992 split the starboard side, creating an L-shaped angle. The wheelhouse, found at 70 feet (21 meters), is adorned with vibrant red, green, and yellow hard corals. Divers can explore its interior, which features loose cables, a staircase, and open cargo holds, with numerous entry and exit points. This site is renowned for its diverse marine life, attracting underwater photographers and divers seeking encounters with large fish. Common sightings include sea turtles, manta rays, groupers, barracuda, jacks, snook, grunts, tarpon, moray eels, and even occasional dolphins. Despite the hurricane damage, coral growth on the wreck is significant, supporting a thriving ecosystem. Due to its depth and potential for strong currents, Ultrafreeze is considered an advanced dive, suitable for certified divers with Advanced Open Water certification. It is typically accessed via a 30-minute boat ride from either Cancun or Isla Mujeres. The typical visibility is around 65 feet (20 meters), and water temperatures average 79°F (26°C).
Highlights
Season calendar
Nov – Apr (Peak)
Socorro season open (Nov–May) for giant mantas and hammerheads. Cozumel bull sharks Dec–Mar. Cenotes excellent year-round. Best overall conditions.
May – Oct (Transition & Sea of Cortez)
Socorro closing, Cozumel still good. Whale sharks arrive at Isla Mujeres Jun–Sep. From August, the Sea of Cortez comes alive: Midriff Islands offer massive sea lion colonies and schooling mobulas. September and October bring world-class diving around La Paz and Cabo Pulmo with whale sharks, hammerheads, and bull sharks on the Explore Baja route.
Dive site facts: Ultrafreeze
- Depth
- 26–30 m
- Current
- Strong
- Entry
- Liveaboard or dayboat
- Level
- Advanced
- Dive type
- Wreck, Reef
- Region / port
- Mexico
- Coordinates
- 21.1555° N, 86.7265° W
Conditions & Currents
Currents at Ultrafreeze can be quite strong, particularly on descent, making it more comfortable for experienced divers. However, some reports indicate that currents can also be low at times. This variability means divers should be prepared for potential drift and strong flows, requiring good buoyancy control and dive planning. The site is a deep wreck, reaching 85-100 feet (26-30 meters), necessitating advanced certification. Visibility typically averages 65 feet (20 meters), and water temperatures are a consistent 79°F (26°C), avoiding thermoclines. Entry and exit strategies should account for the current conditions, potentially involving negative entries or live boat pick-ups, though specific techniques are not detailed in sources. Due to its depth and potential currents, this dive is considered challenging and suitable for advanced divers comfortable with such conditions and wreck penetration.
Why dive Ultrafreeze from a liveaboard?
Ultrafreeze 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 Ultrafreeze on their Mexico itineraries.
Liveaboards diving Ultrafreeze
These liveaboards may visit Ultrafreeze on selected itineraries, the exact dive sites depend on departure, weather and conditions.

Nautilus Explorer
Mexico

Valentina
Mexico

Rocio del Mar
Mexico

Nautilus Under Sea
Mexico

Nautilus Belle Amie
Mexico

Quino del Mar
Mexico

Nautilus Gallant Lady
Mexico
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