Agios Onoufrios Tunnel
Location: Chania, Region of Crete, Greece
Also known as: Agios Onoufrios Submarine Passage, Akrotiri Swim-Through, Chania Tunnel, Onoufrios Tunnel, Τούνελ Αγίου Ονουφρίου
Dive Site Specs
- Max depth:
- 22m
- Difficulty:
- Advanced Open Water
- Entry type:
- Boat Dive
- Coordinates:
- 35.550563, 24.069551 (Directions on Google Maps)
- Rating:
- 4.0/5 (1 reviews)
- Tags:
- Cavern, Boat Dive
Overview
The site offers crystal-clear waters and winding passages, with a maximum depth of approximately 22 meters. The area also features a long vertical wall with interesting marine life, sponges, and abundant microlife.
Access: Agios Onoufrios Tunnel is accessed by dive boat departing from local harbors in Chania, Region of Crete. Dive boats anchor or secure to mooring lines above the site.
Marine life: Documented marine species observed at Agios Onoufrios Tunnel include common octopuses (Octopus vulgaris), encrusting sponges and yellow cluster anemones (Parazoanthus axinellae).
Safety: Dives should be planned in accordance with local marine weather and surface swell conditions. Deploy a surface marker buoy when ascending in open water away from coastal rock formations.
Nearby Dive Sites
- Agios Onoufrios Seal Cave (0.0 km away)
- Blue cave (0.1 km away)
- Spot Lights (0.1 km away)
- Cathedral (0.2 km away)
- Magic Gate (Cave) (3.2 km away)
- Kalami beach Messerschmitt wreck (10.8 km away)
Recent Dives
- Agios Onoufrios Tunnel - 2025/10/24 (by kargig · Oct 24, 2025 · Depth: 14.8m · Duration: 112 min)
- Agios Onoufrios Tunnel - 2025/10/22 (by kargig · Oct 22, 2025 · Depth: 21m · Duration: 103 min)
Associated Diving Centers
- Chania Diving Center (Chania, Greece)
- Blue Adventures Diving (Chania, Greece)