Independent article for off-slack timing and shallow swim-through context.
Swordfish Island boat dive with a shallow tunnel.
Swordfish Island boat dive with a shallow tunnel.
Boat access, slack timing, and cold-water currents make a local charter the sensible call.
Swordfish Island is a boat-access Vancouver Island dive that rewards divers who are comfortable in cold water and good at timing current. The site is known for a shallow swim-through tunnel draped in soft coral and anemones, plus the usual Pacific Northwest mix of sea lions, rockfish, nudibranchs, crabs, shrimp, wolf eels, and octopus. It is the sort of site that feels easy only after you are properly geared up and the slack water is right.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
4.5m - 6.1m
Depth Note
The signature tunnel averages about 4.5 m deep and sits around 6 m at its deepest point.
Best Season
Fall and winter for the clearest water.
Typical Conditions
Cold, current-swept water with kelp, a shallow tunnel, and lots of life on the rock.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Treat the swim-through as overhead, dive it off-slack, and use a dry suit.
Access Restrictions
Slack-water timing and dry-suit readiness are part of the standard plan.
Legal Notes
Check local tide and current tables and follow charter guidance.
Community notes to help plan your visit.
Scuba Diving
Best for experienced cold-water divers who want a short tunnel, strong marine life, and active conditions.
Freediving
Not recommended for casual freediving because of cold water, current, and overhead features.
Snorkeling
Not a snorkel site.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Independent article for off-slack timing and shallow swim-through context.
Tourism guide for Southern Vancouver Island dive access, charter logistics, and seasonal clarity.
Independent article for the tunnel geometry, soft coral, and anemone context.
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