St. Andrews – Passamaquoddy Bay – Nova Scotia & Atlantic Canada

Site Overview

St. Andrews – Passamaquoddy Bay in the Nova Scotia & Atlantic Canada region offers intermediate Atlantic diving with tidal bay reefs with seal colony and occasional whale sightings. The site features depths from 5 to 22 metres with high biodiversity including Harbour Seal, Lobster, and diverse Atlantic marine life. The reef environment provides excellent opportunities for tidal diving in Canada's maritime provinces where centuries of seafaring history are preserved beneath the waves. 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.