Slovenia Tiia Monto · CC BY-SA 3.0
The descent
The entrance, at 572 m.
The real relief above Predjama, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey. No depth has been published for this cave yet.
572m
Entrance altitude
from the 30 m relief model
10°C
Inside, all year
the yearly average outside, at the entrance
145m
Rock above
the highest point within 1.5 km
Inside and outside
10 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 10 °C here, in January and in August. In July the afternoon reaches 26 °C at the entrance, 16 °C warmer than inside: take a jacket.
- 2°-4°Jan
- 4°-4°Feb
- 9°-1°Mar
- 15°4°Apr
- 19°8°May
- 23°13°Jun
- 26°15°Jul
- 26°14°Aug
- 20°9°Sep
- 15°5°Oct
- 9°2°Nov
- 4°-3°Dec
Outside: afternoon and night averages for 1991–2020 (NASA POWER) brought to the altitude of the entrance. Inside: the yearly average, which deep parts of a cave keep. Near the entrance it follows the weather a little.
Cave in Slovenia
Predjama is a cave in Slovenia. The entrance is at 572 m.
Getting there.
- Wild cave: only with caving equipmentNo paths or lights inside. Go only with a caving club or a qualified guide.
- Postojnanearest town · 8.3 km in a straight line
- Belvedernearest viewpoint · 0.0 km from the entrance
- Trieste Airport (TRS)nearest airport with scheduled flights · 51 km in a straight lineCar hire at TRS airport (Ronchi dei Legionari/Trieste)Discover Cars · sponsored link↗
Plan the visit
Guided tours, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From above.
The ground above the cave, with the relief shaded, the line of the section and what people have mapped around the entrance.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the section above. Points © OpenStreetMap contributors.
Around the entrance.
- 4other cave entrances within 3 kmOsojca and 3 more
- 2springs within 2 km
- 1sinkholes within 3 kmGolobova dolina
- 4viewpoints within 3 kmBelveder and 3 more
- 7marked hiking routes within 3 km146 ~ Pot kurirjev in vezistov NOV Slovenije, 147 ~ Pot kurirjev in vezistov NOV Slovenije, Jakobova pot – Primorska veja and 4 more
- 4car parks within 2 km
- 12information boards and visitor centres within 3 km
- 7campsites within 8 kmCamp Mirjam, Pivka Jama, Lipa Plac and 4 more
- 32hotels and guesthouses within 8 kmCenter, Turistična kmetija DOLENČEVI, Proteus and 29 more
- 2restaurants and cafés within 3 km
- caving clubs and spots within 15 km
- climbing crags within 3 km
- named waterfalls within 4 km
- bus stops within 2 km
Counted in OpenStreetMap, the map anyone can edit, around the entrance. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Postojna8.3 km in a straight line
- Vipava13 km in a straight line
- Logatec14 km in a straight line
- Rakek14 km in a straight line
- Pivka16 km in a straight line
- Cerknica18 km in a straight line
- Ajdovščina18 km in a straight line
- Divača19 km in a straight line
In our other atlases
What else is around Predjama.
The river at the entrance, the waterfalls, the lakes, the mountains and volcanoes above, the canyons, beaches and islands nearby — from our other atlases.
Peakyas4 mountains within 10 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | 2 | 4 | 9 | 15 | 19 | 23 | 26 | 26 | 20 | 15 | 9 | 4 |
| Afternoon | 2 | 4 | 9 | 15 | 19 | 23 | 26 | 26 | 20 | 15 | 9 | 4 |
| Night | -4 | -4 | -1 | 4 | 8 | 13 | 15 | 14 | 9 | 5 | 2 | -3 |
| Rain (mm) | 60 | 73 | 71 | 73 | 96 | 88 | 83 | 94 | 118 | 104 | 109 | 85 |
| Rainy days | 8 | 8 | 10 | 12 | 14 | 14 | 13 | 12 | 12 | 11 | 12 | 10 |
| Sun hours/day | 3.0 | 4.1 | 5.3 | 6.1 | 6.9 | 7.8 | 8.4 | 7.5 | 5.6 | 4.4 | 2.4 | 2.3 |
| Snow on the ground (cm) | 15 | 14 | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 13 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 2 | 2 | -4 | 60 | 3.0 |
| Feb | 4 | 4 | -4 | 73 | 4.1 |
| Mar | 9 | 9 | -1 | 71 | 5.3 |
| Apr | 15 | 15 | 4 | 73 | 6.1 |
| May | 19 | 19 | 8 | 96 | 6.9 |
| Jun | 23 | 23 | 13 | 88 | 7.8 |
| Jul | 26 | 26 | 15 | 83 | 8.4 |
| Aug | 26 | 26 | 14 | 94 | 7.5 |
| Sep | 20 | 20 | 9 | 118 | 5.6 |
| Oct | 15 | 15 | 5 | 104 | 4.4 |
| Nov | 9 | 9 | 2 | 109 | 2.4 |
| Dec | 4 | 4 | -3 | 85 | 2.3 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (572 m) with the standard lapse rate. Not a forecast.
Photographs
Inside and around.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 29% | 54% | 109% | 37% | 91% | 161% | 125% | 145% | 97% | 201% | 42% | 240% |
| 2021 | 225% | 102% | 56% | 133% | 230% | 40% | 152% | 111% | 64% | 69% | 140% | 122% |
| 2022 | 70% | 72% | 53% | 114% | 100% | 81% | 86% | 75% | 282% | 52% | 119% | 221% |
| 2023 | 294% | 41% | 118% | 154% | 188% | 158% | 264% | 282% | 69% | 234% | 163% | 174% |
| 2024 | 206% | 127% | 213% | 125% | 232% | 136% | 144% | 90% | 209% | 196% | 70% | 61% |
| 2025 | 186% | 91% | 225% | 117% | 133% | 30% | 222% | 105% | 129% | 140% | 120% | 37% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Predjama
Slovenia
- —Depth
- —Galleries
- 572 mEntrance altitude
- 10 °CInside, all year
Postojna Cave
Slovenia · 7 km
- —Depth
- —Galleries
- 544 mEntrance altitude
- 10 °CInside, all year
Škocjan Caves
Slovenia · 20 km
- —Depth
- 6.2 kmGalleries
- 378 mEntrance altitude
- 12 °CInside, all year
Wild Lake
Slovenia · 20 km
- 160 mDepth
- —Galleries
- 340 mEntrance altitude
- 12 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q15303220) · CC0 |
|---|---|
| The relief above, the entrance altitude, the section and the 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Entrances, springs, sinkholes, opening hours and what is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, lakes, mountains, canyons, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
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viewpoints
Every viewpoint with its real 360° panorama: the peaks you can name, how far you see and where the sun sets.Coming soonVisit 
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