Grotta di Nereo
Cave diving in Sardinia · about 13 km from Alghero
- Max depth
- 35 m
- Type
- Backmount
- Certification (estimate)
- Open water / no overhead
- Scooter
- No scooter
Considered the largest underwater sea cave in the Mediterranean: tunnels, arches and air chambers with red coral, Leptopsammia, lobsters and morays.
More about Grotta di Nereo
Signed-in divers also see:
- Whether this site fits everyone's certification, gas and gear
- Access, parking and the route from the road
- Exact map pin and navigation
- Depth profile and sumps
- Configuration advice
- Scooter advice
- Driving times from your stay and a plan with the AI instructor
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Plan a cave diving trip to Sardinia
Enter your team, with certifications, gas and configurations, and see right away which caves fit. With driving times from your stay, fill stations and an AI instructor who thinks along.
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Sardinian regional cave cadastre, dive centres, DeepDivingAcademy, Scintilena, Wikipedia, Capo Caccia AMP rules, news reports; Sept 2026). Pins from the cadastre unless stated; ~ = estimate. Rules change — check locally.