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Slovenia · about 34 km from Idrija

Luknja pri Plavah

  • Max depth24 m
  • CertificationCavern
  • Water temperature≈ 4–16 °C, varies with the seasonestimated, no reports yet
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The dive

Luknja pri Plavah is a rock hole in the bed of the Soča at Plave. Visibility is usually poor (better in winter); the water is ~16 °C in summer and ~4 °C in winter.

The Solkan hydro dam controls current and water level at Plave: dive only at low water.
Source: SPZ – Potapljaški atlas Slovenije, popis 2 (2005/2012) ↗
Profile and sections

Luknja pri Plavah is a rock hole in the bed of the Soča at Plave. Visibility is usually poor (better in winter); the water is ~16 °C in summer and ~4 °C in winter. At low water the current is barely noticeable thanks to the reservoir of the Solkan hydro plant.

The site is described in the Slovenian diving federation's atlas (level P2) and on wannadive.net as a cave dive.

Depth and profile
Entrance ~2 m wide at ~-16/-17 m; inside to ~-24 m (depends on sediment); the hole narrows at the end
Configuration
Small rock hole; a light is essential. No details on the space inside.
DPV: Not DPV-suitable (estimate)
Small hole; no point.
Who can dive where
  • CaveAt least Cavern
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveConfiguration unknown — research beforehand · doesn't decide who may dive
  • Whole caveGoes down to 24 m (trimix or deco may be needed) · doesn't decide who may dive
Depends on water level or swell

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

Enter from the right bank of the Soča, ~100 m downstream of the bridge at Plave; parking for 2–3 cars. Swim along the bottom towards the middle of the river to a rock wall dropping to -17 m, where the entrance is.

Plan your route ↗

Around Luknja pri Plavah

FillsNo fill station known nearby
Where to sleepAround Idrija on Booking.com ↗

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Caves nearby6 within 56 km

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Sources, sharing and disclaimer

Sources

Current conditions

Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Drowning Protection Act ZVU, Uradni list RS 44/2000; Cave Protection Act ZVPJ via JZS; 24ur Jan 2009 and the JZS rescue archive; Svet24 Dec 2025; RTV SLO Jul 2026; Radio Ognjišče; the Slovenian diving federation's PAS atlas and emergency list (2021); Wikipedia; kraji.eu; Moja jezera; Kam na izlet; Dolenjski kras (JKNM); X-Ray Mag and InDEPTH (2020); wannadive.net; potapljanje.si; Norik-sub and watersports.si; visit-idrija.si; Sept 2026). Pins from Wikipedia, the SPZ atlas and Kam na izlet; three sites have no pin. ~ = estimate. Rules change — check locally.