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Official Porto tourism PDF with waterfront and recreational-boat context.
Dive Spot Guide•
Marialva
Porto wreck dive with silt, sand, and boat-only access.
Boat-only wreck off the Douro mouth for wreck divers comfortable with silt, limited visibility, and variable current.
About Marialva
Marialva is a boat-only wreck off the mouth of the Douro River, reached by a long run from Porto-area harbour bases. The tug lies on a sandy bottom and is heavily damaged and silted, with the broken hull spreading into a low-contrast wreck profile. It works as an intermediate wreck dive for divers who are comfortable with current-sensitive boat logistics, limited visibility, and a more technical feel than a simple reef outing. Expect conger eels, octopus, and occasional rays around the wreckage, with the real appeal being the wreck structure itself rather than easy scenery.
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Research Estimate At Marialva
Conservative baseline from public research. No community dives logged yet.
AccessChallenging entry effort
Aquatic LifeAverage variety
FacilitiesGood facilities
Crowd / PopularityFew visitors
CurrentModerate current
SurgeLight surge
Where Is Marialva?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Marialva Planning Details
Depth range, seasonality, and planning context.
Reported Depth
25m
Depth Note
Wreck lies on a sandy bottom at 25 m and is heavily damaged and silted.
Best Season
All year
Typical Conditions
A damaged wreck on sand and silt with a broken-up profile around the hull.
Safety & Access At Marialva
Hazards, restrictions, and access requirements.
Key Hazards
Low visibilityRestricted accessStrong current
Safety Notes
Plan for current shifts, reduced visibility, and a long boat run; this is not a casual shore option.
Access Restrictions
Accessible only by boat.
Local Intel For Marialva
Community notes to help plan your visit.
Scuba Diving
Best for wreck divers with good buoyancy control and comfort in silted water.
Freediving
Not a freedive target because it is a deeper boat wreck with limited visibility.
Snorkeling
Not a snorkel spot; this is a scuba-only wreck.
Wildlife at Marialva
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Marialva
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Marialva
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.
