sansebastianturismoa.eus · Official Tourism
Mount Ulia city-side coastal context.
Dive Spot Guide•
Las Grietas
Las Grietas is a slabby coastal dive with cracks, anchors, and small life.
A shore-based Mount Ulia dive with east-west slabs, merchant anchors, and a dense mix of small marine life.
About Las Grietas
Las Grietas is a coastal Mount Ulia dive built from east-west slabs, cracks, and merchant anchors that keep the dive compact but textured. The site is more about structure and small-life detail than big walls, with nudibranchs, octopus, cuttlefish, conger eels, and spider crabs crowding the rock line when the sea is calm.
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Research Estimate At Las Grietas
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 12m
AccessSimple entry
Aquatic LifeGreat variety
FacilitiesBasic facilities
CurrentModerate current
SurgeModerate surge
Where Is Las Grietas?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Las Grietas Planning Details
Depth range, seasonality, and planning context.
Reported Depth
14m - 30m
Depth Note
The site starts around 14 m and tops out near 30 m, with merchant anchors on the bottom.
Best Season
Summer and early autumn, when seas are calmer and conditions are usually more forgiving.
Typical Conditions
Shore-access coastal slabs with moderate depth, rocky relief, and conditions that improve in calmer months.
Safety & Access At Las Grietas
Hazards, restrictions, and access requirements.
Key Hazards
Entanglement risk
Safety Notes
Anchors on the seabed may present snagging hazards for hoses and lines.
Access Restrictions
Best for certified scuba divers comfortable with coastal entry and moderate depth; not a casual snorkel target.
Legal Notes
Respect local coastal access and sea-state conditions around Mount Ulia and Pasaia.
Local Intel For Las Grietas
Community notes to help plan your visit.
Scuba Diving
Minimum depth is around 14 m with a maximum of about 30 m, over multiple rocky slabs.
Freediving
The site is primarily a scuba objective; freediving only makes sense on the shallowest slabs and in very calm conditions.
Snorkeling
Not a true snorkel site; the useful structure and life begin well below the surface-swim zone.
Wildlife at Las Grietas
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Las Grietas
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Las Grietas
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility12m
Activity
No dive activity logged yet.
