shop.sansebastianturismoa.eus · Official Tourism
Official tourism listing confirming the Ondartxo / Pasaia San Pedro locale.
Dive Spot Guide•
Ondartxo
Ondartxo is a boat-access slab dive off Mount Ulia.
Local operator required
Boat access from Pasaia is the normal route.
Plan a local-operator boat dive on an east-west slab with a channel, a small cave, and a deeper north wall; calm seas make it more relaxed.
About Ondartxo
Ondartxo is a boat-access slab dive on the slopes of Mount Ulia near the mouth of Pasaia. The route runs east-west across broken rock, with a channel, sand pockets, and a small camouflaged cave on the south side. Divers can keep it moderate along the sheltered side or continue north to a steeper wall when conditions are calm. Expect strong macro interest and plenty of rock life, with the site best on settled sea days.
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Research Estimate At Ondartxo
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 12m
AccessModerate entry effort
Aquatic LifeGreat variety
FacilitiesBasic facilities
Where Is Ondartxo?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Ondartxo Planning Details
Depth range, seasonality, and planning context.
Reported Depth
14m - 32m
Depth Note
Main slab is around 14 m; a south-side line can stay in the mid-teens to low twenties, while the north wall drops to about 30-32 m.
Best Season
Summer and early autumn usually give the most reliable windows.
Typical Conditions
A rocky east-west slab with a channel and sand pockets; the site is more comfortable in calm windows and less relaxed when Bay of Biscay weather builds.
Safety & Access At Ondartxo
Hazards, restrictions, and access requirements.
Key Hazards
Boat trafficWaves
Safety Notes
Keep the small south-side cave as a look-in feature only, watch the return line to the anchor, and simplify the plan if swell or port-mouth flow builds.
Access Restrictions
Boat access is the normal pattern; keep the plan tied to a local operator and a settled sea state.
Legal Notes
Follow local harbor and boat-traffic rules near the mouth of Pasaia.
Local Intel For Ondartxo
Community notes to help plan your visit.
Scuba Diving
Use the shallower south side/channel for a relaxed tour, or take the deeper north wall if your plan and conditions allow; this is a better fit for divers comfortable with a boat dive than for first-timers.
Freediving
Not a freedive-first site; the useful structure sits beyond comfortable breath-hold range and is easiest to enjoy with scuba.
Snorkeling
Not a snorkel-first site; the interesting slabs, cave, and wall are subtidal.
Recent Logged Visits At Ondartxo
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Ondartxo
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility12m
Activity
No dive activity logged yet.
