Gros Morne – Bonne Bay – Newfoundland & Labrador
Site Overview
Gros Morne – Bonne Bay in Newfoundland & Labrador offers advanced North Atlantic diving with freshwater-over-saltwater fjord with underwater cliffs and clear cold water. The site features depths from 8 to 40 metres with high biodiversity including Harbour Seal, Cod, and diverse cold-water marine life. Newfoundland's rugged coastline preserves centuries of maritime history with extraordinary cold-water diving in one of Canada's most dramatic coastal environments. The cold, nutrient-rich waters support extraordinary biodiversity with colourful invertebrate communities, large predatory fish, and marine mammal encounters that make every dive rewarding. Professional dive operators provide guided experiences with equipment rental, boat transport, and local knowledge that enhances the diving experience significantly. The site attracts divers from across Canada and internationally who seek the unique combination of cold-water marine ecosystems, historical significance, and accessible diving infrastructure. Underwater photographers will find exceptional opportunities with diverse macro subjects, wide-angle reef landscapes, and the dramatic lighting that cold-water environments provide. The diving season extends from late spring through early autumn, with peak conditions during the summer months when water temperatures are highest and marine life is most active. The cold, nutrient-rich waters of the region support extraordinary biodiversity with colourful invertebrate communities, large predatory fish, and frequent marine mammal encounters that make every dive rewarding for experienced cold-water divers.
Dive Briefing
"Gros Morne – Bonne Bay offers diving to 40 metres with an average depth of 25 metres in the fjord and wall environment. The site features high biodiversity with Harbour Seal, Cod, Sea Star, and diverse North Atlantic organisms. Access is by boat with a 20-minute boat ride. The deep fjord diving with halocline defines the diving experience at this unique Newfoundland site. Divers should plan their descent carefully, monitoring depth and air consumption throughout the dive. The site rewards patient divers who take time to explore the smaller features and crevices where marine life shelters. Buoyancy control is essential for protecting the delicate marine ecosystems and maximising bottom time in the cold water environment. Communication with dive buddies is important given the cold water conditions and potential for rapid environmental changes. Safety stops should be planned conservatively given the cold water exposure and potential for thermoclines at depth. The dive plan should include careful assessment of entry and exit points, particularly for shore dives where rocky terrain requires appropriate footwear and caution. Underwater navigation follows the natural contours of the reef or wreck structure, with divers maintaining close buddy contact throughout the dive. Emergency procedures should be reviewed before entry, including the location of the nearest exit point and the availability of surface support. Post-dive warming is essential given the cold water exposure, with hot beverages and warm clothing readily available on the boat or at the shore base."
Signature Marine Life
Harbour Seal
Phoca vitulina
Best: June, July, August
Cod
Gadus morhua
Best: June, July, August
Sea Star
Asteroidea spp.
Best: June, July, August
Anemone
Actiniaria spp.
Best: June, July, August
Wolffish
Anarhichas lupus
Best: January, February, March
Safety & Hazards
- Extreme cold North Atlantic water
- Strong currents and rough seas
- Remote location far from medical facilities
- Iceberg drift hazard
- Limited visibility from plankton
- Hypothermia from extended exposure
Traveler Notes
Who is this for?
Gros Morne – Bonne Bay is best suited for advanced divers with cold-water experience and appropriate certification. The site rewards nature lovers and underwater photographers with high biodiversity. Divers with experience in cold-water environments will find the conditions familiar and rewarding. The site offers excellent training opportunities for divers looking to build cold-water skills and confidence in a controlled environment. Photography enthusiasts will appreciate the diverse subjects and dramatic underwater landscapes that the cold-water ecosystem provides throughout the diving season.
Quick Stats
Dive Logistics
- Gros Morne Dive Charters
Photography Info
Best for: wide_angle, macro