portal.azores.gov.pt · Official
Azores government PDF describing the seamount, hydrothermal activity, and reserve context.
Dive Spot Guide•
Dom João de Castro
Offshore Azores seamount with vents, walls, and pelagic life.
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Local operator required
The site is remote and offshore, so a knowledgeable local operator is required for safe access and planning.
Dom João de Castro is an offshore Azores seamount between Terceira and São Miguel, with vents and steep volcanic walls. It is boat-only and suits advanced divers comfortable with current.
About Dom João de Castro
Dom João de Castro is a remote Azores seamount dive that combines an active submarine volcano, hydrothermal vents, and sweeping open-ocean walls. The site is reached by boat and is best handled as a serious offshore trip for divers comfortable with current, depth, and large pelagic life. It stands out more for volcanic terrain and big-water exposure than for an easy reef profile.
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Research Estimate At Dom João de Castro
Conservative baseline from public research. No community dives logged yet.
AccessDifficult access
CoralHealthy coral
Aquatic LifeExceptional variety
FacilitiesNo facilities
CurrentStrong current
Where Is Dom João de Castro?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Dom João de Castro Planning Details
Depth range, seasonality, and planning context.
Reported Depth
13m - 60m
Depth Note
The seamount summit rises to about 13 m below the surface, while the broader site is listed to roughly 60 m.
Best Season
Year-round; calm weather windows are the easiest time to get there.
Typical Conditions
Boat-only offshore seamount diving with hydrothermal vents, steep volcanic walls, coral gardens, and open-ocean exposure. The site is planned around current and pelagic life rather than easy reef sightseeing.
Safety & Access At Dom João de Castro
Hazards, restrictions, and access requirements.
Key Hazards
Dangerous wildlifeRestricted accessStrong current
Safety Notes
This is a boat-only offshore seamount dive with current and large marine life, so advanced planning, gas management, and operator guidance are essential.
Access Restrictions
The bank is a marine reserve and should be dived responsibly through a boat operation that understands the offshore conditions.
Legal Notes
Fishing restrictions and marine-reserve expectations apply, so divers should follow local conservation and operator rules.
Local Intel For Dom João de Castro
Community notes to help plan your visit.
Scuba Diving
The dive is centered on an active underwater volcano with vents, a crater-like top, and steep walls dropping away into open water.
Freediving
Advanced freedivers may find the shallow summit interesting, but this site is primarily a serious scuba seamount.
Snorkeling
Not a snorkeling-first site; the draw is the offshore seamount, vents, and pelagic life at dive depth.
Wildlife at Dom João de Castro
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Dom João de Castro
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Dom João de Castro
Average conditions based on logged dives & visits.
No community dive data has been logged here yet. Be the first to record a dive and seed the averages.
