Dive Site: Knife

Dive site facts: Knife

Depth

12–30+ m

Typical dive

12–25 m, 50–60 min

Current

Mild

Visibility

20–30+ m

Water temperature

26–29°C

Entry

Day boat

Level

Open Water Diver to Advanced

Dive type

Reef, Wall

Night dive

Possible

Region / port

Grand Cayman

Coordinates

19.4007, -81.3888

Conditions & Currents

Currents at "Knife," consistent with Grand Cayman's general conditions, are typically mild due to the limited tidal range of the Cayman Islands. While there are large-scale ocean effects like the Caribbean Current bringing warm water, these generally contribute to stable diving conditions rather than strong localized currents. Divers can expect calm waters with minimal swells, making entry and exit via boat relatively easy. Visibility usually remains excellent, often exceeding 30 meters (100 feet), due to minimal river runoff and clear Caribbean waters. However, during the hurricane season from June to November, conditions can occasionally become choppier with reduced visibility, especially if a storm passes nearby, though storms are infrequent and usually predictable. The generally relaxed conditions at "Knife" allow divers of all experience levels to explore without the stress of stro

Marine life & sighting chances

Tarpon

common

French Angelfish

common

Reef Sharks

occasional

Eagle Rays

occasional

Groupers

common

Hawksbill Turtle

occasional

Loggerhead Turtle

occasional

Vibrant Tropical Fish

common

Sponges

common

Corals

common

Dive profile & how the dive runs

Diving "Knife" typically begins with a boat entry, where you descend to the top of the coral ridge. The site features a distinct coral formation that creates a natural 'knife-edge' along a wall, starting in approximately 12 meters (40 feet) of water. The dive usually progresses by following this wall, allowing you to explore the topography as it drops to deeper sections. Maintain a comfortable depth range, typically between 15-25 meters (50-80 feet), to maximize bottom time and explore the various crevices and coral overhangs. Marine life such as tarpon and reef fish are commonly encountered along the wall. The turn point is determined by air consumption or dive computer limits. Ascend gradually along the reef, conducting your safety stop at 5 meters (15 feet) near the top of the shallower reef section, offering opportunities for observing smaller reef creatures before surfacing.

Underwater photography

The distinctive coral ridge and wall topography at "Knife" offer excellent wide-angle photography opportunities, especially to capture the dramatic structure and the expansive blue water. A wide-angle lens, like a fisheye, is ideal for framing the wall, resident tarpon, and schooling fish. For macro enthusiasts, the healthy coral formations and sponges provide habitat for various small critters, best captured with a macro lens. Visibility is consistently high, allowing for effective natural light photography in shallower areas, but strobes are recommended to bring out the true colors of the corals and marine life, especially as you explore deeper sections of the wall. Practice good buoyancy control to avoid damaging the pristine corals and to maintain stable shots.

Combine with nearby dive sites

• 3 Fathom Wall

  3 Fathom Wall is an exciting and fish-filled dive site located in the Cayman Islands, specifically at the intersection of the renowned…

• Bloody Bay Wall

  Bloody Bay Wall, located within the protected Bloody Bay Marine Park on Little Cayman, is celebrated globally as a premier dive destination.

• Bonnie's Arch

  Bonnie's Arch is a renowned dive site located on the West Side of Grand Cayman, celebrated for its spectacular natural arch formation and…

• Cemetery Wall

  Cemetery Wall, located on Cayman Brac, is a renowned wall dive named for a nearby cemetery.

• Grand Cayman Wall

  The Grand Cayman Wall stands out as one of the world's premier wall diving destinations, encompassing numerous sites around the island.

• Kittiwake Reef

  The USS Kittiwake, a former US Navy submarine rescue vessel, was deliberately sunk in 2011 off Grand Cayman's Seven Mile Beach to create an…

Getting there & logistics

Grand Cayman is easily accessible, with Owen Roberts International Airport (GCM) serving as the main gateway, offering direct flights from the US, Canada, and the UK. Dive trips to "Knife" typically depart from various ports along Grand Cayman's west side, often as part of a two-tank day trip on a day boat. Most dive operators are conveniently located, providing transport from resorts. While no specific permits or fees are mentioned for "Knife," diving in the Cayman Islands is regulated, and adhering to local marine park rules is essential. Trips often combine wall dives like "Knife" with shallower reef sites or wreck dives, such as the USS Kittiwake. Accommodation options range from resorts catering to divers to private rentals, with packages often including transfers to dive centers.

Safety & environment

For diving in Grand Cayman, including sites like "Knife," the nearest recompression chamber is located on the island, providing critical support in case of a dive emergency. Evacuation to larger medical facilities, if necessary, would involve air transport. All divers are strongly advised to have comprehensive dive insurance that covers recompression treatments and medical evacuation. Site-specific hazards at "Knife" are minimal due to generally calm conditions and mild currents, but standard safe diving practices, including adherence to no-decompression limits and buddy system protocols, are paramount. Marine protected area rules prohibit touching marine life or corals and restrict spearfishing. Carrying a dive knife or cutting tool is recommended for entanglement risks, but its use is strictly limited to emergencies, never for harming marine life.

Who it suits, and who it doesn't

FAQ

Knife FAQ

Liveaboards diving Knife

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

Cayman Aggressor IV

Cayman Islands

18 guests33 m