Local community page describing Portu Pedrosu as a hidden fjord reachable by sea.
Overhead limestone siphon in a sheltered fjord
Overhead limestone siphon in a sheltered fjord
Boat access and cave-siphon conditions make local guiding the practical default.
Portu Pedrosu - Sifone is a limestone fjord dive where the technical draw is a short overhead siphon cut into the cliff line. The site is all about boat access, calm-weather timing, and precise buoyancy through the passage, with the main reward coming from the light, the rock texture, and the cave fauna. It is not a casual swim site; the overhead section and deeper entry make it a fit for expert divers who already manage gas, trim, and line discipline well. The outside cove is scenic and sheltered, but the siphon is the reason to go.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
6m - 18m
Depth Note
The siphon is entered from the deep side around 18 m and opens to a window around 6 m, so the feature is a short technical passage rather than a long drift.
Best Season
Calm-weather months, usually late spring through early autumn, are the practical window.
Typical Conditions
Sheltered limestone cove with a technical siphon, best in calm sea state and suited to precise buoyancy and gas planning.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Treat the siphon as an overhead cave profile for expert divers only. Plan redundant gas, line discipline, and conservative turn pressures, and only enter in sea conditions that allow a controlled boat approach.
Access Restrictions
Boat access and expert-level cave experience are required for the siphon. Calm sea state is needed to reach the inlet safely.
Legal Notes
Sea access and local skipper judgment govern whether the site is diveable on a given day. The overhead section should only be attempted by divers trained for cave or siphon profiles.
Community notes to help plan your visit.
Scuba Diving
Enter from the deep end, work the short limestone passage, and exit at the window in shallower water. The appeal is the light play, cliff geometry, and cave fauna rather than a long swim.
Freediving
Not a freedive venue; the overhead siphon and entry depth make this a scuba-only technical dive.
Snorkeling
Not a snorkel site. The draw is below the surface and the main feature is a cave passage that requires scuba and overhead training.
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
Local community page describing Portu Pedrosu as a hidden fjord reachable by sea.
Boat-operator page showing Portu Pedrosu as part of the Capo Monte Santo fjords route from Cala Gonone.
Official tourism page describing the fjord-like limestone coastline and calm-weather access window.
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