Slovenia · about 2 km from Idrija
Divje jezero
Closed to divers
Diving in Divje jezero is strictly prohibited until further notice (Slovenian cavers, October 2026).
- Max depth160 m
- CertificationFull cave
- SpecialExperienced divers
Diving and fills
Dive here with
No dive centre guides here yet. Do you dive here with guests? Add your centre for free →
Now at Divje jezero
What it looks like
All 3 videos and posts
Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
- Facebook
visitidrija
- Facebook
geoparkidrija
Search for more onYouTube ↗Instagram ↗Facebook ↗
Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
Divje jezero is an emerald lake (0.23 ha) below steep cliffs at the northern edge of the Črnovrška planota. Sources describe the water as cold, though its temperature is not published, and the lake is home to the olm.
1 earlier accident or incident has been reported at this cave. Read what happened ↓
Profile and sections
Divje jezero is an emerald lake (0.23 ha) below steep cliffs at the northern edge of the Črnovrška planota. Sources describe the water as cold, though its temperature is not published, and the lake is home to the olm.
The lake is a Vauclusian-type karst spring. It drains via the Jezernica (55 m, Slovenia's shortest river) into the Idrijca. Discharge occasionally exceeds 60 m³/s; at low water there is no outflow. Cave divers have worked here since the late 1960s. Divje jezero has been a natural monument since 1967 and was set up in 1972 as Slovenia's first 'museum in nature'.
- Depth and profile
- Lake basin ~15 m deep; from its floor a steep flooded shaft, explored to -160 m (2001) and 415 m in length · compressed air legally limited to -40 m
- Configuration
- Deep, cold shaft: CCR or twinset with trimix and deco gases, with cold-water-rated regulators. Passage profile not published. Small single cylinders are unsuitable.
- DPV: Not DPV-suitable
- Vertical shaft, and motorised craft are banned in Slovenian caves: electric scooters only for sump research (ZVPJ art. 18).
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR
- Configuration unknown — research beforehand
- Goes down to 160 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Car park close to the lake; marked paths and a flight of steps lead down to the water. The lake is ~2 km south of Idrija. Foreign divers fall under the Slovenian rules for technical diving: notify the police beforehand and dive with a qualified Slovenian diver (see region info).
Around Divje jezero
FillsNo fill station known nearby
Caves nearby5 within 34 km
News
All (1)
Accidents and incidents
What happened at this cave before, with the sources. No names are given; read it as a lesson for your own planning.
- Several fatal accidents: accidents in April and August 1995 and June 1997 (two major rescue operations); by around 2000 five people had died. In 2001 another diver died at ~-30 m after the diaphragm of his regulator froze. Radio Ognjišče (2016) counts three divers killed.
Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 13 Nov 2026.
More of the latest in Slovenia: conditions, closures and news →Going to Slovenia with your team?
Marcel finds the sites that match your team's certifications.
Plan a trip