Postojna Cave
Postojna Cave is a show cave and archaeological site located within the Dinaric Alps in the Municipality of Postojna. It is part of the larger Postojna-Planina cave system and is recognized as registered immobile cultural heritage of Slovenia. As the second most looked-up sight in the country, it offers visitors access to this extensive karst environment.
Planning a visit
The cave is accessible year-round, though visitors should plan for regional weather conditions when traveling. Summers are the warmest months, with daily highs reaching 21 °C to 24 °C in June and July, while winters are cold, with average lows dropping to -4 °C in January and February. Rain occurs throughout the year, with the highest rainfall amounts recorded in September and October.
Postojna Cave is located 38 km from Ljubljana. The nearest airport is Ljubljana Jože Pučnik Airport, situated 53 km away. You can combine a visit to the cave with nearby sites such as Predjama Castle, located 6.9 km away, or the Škocjan Caves, which are 20.8 km away. The site is wheelchair accessible and charges an entrance fee.
Weather by month
The warmest month is July, with an average high of 24 °C. Rain is spread fairly evenly through the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | 3 | 4 | 9 | 13 | 18 | 21 | 24 | 23 | 19 | 14 | 8 | 4 |
| Average low, °C | -4 | -3 | 0 | 4 | 9 | 12 | 14 | 14 | 10 | 7 | 2 | -2 |
| Rainfall, mm | 99 | 94 | 118 | 128 | 133 | 151 | 103 | 133 | 164 | 176 | 170 | 158 |
| Rainy days | 10 | 10 | 11 | 11 | 19 | 15 | 16 | 14 | 13 | 12 | 13 | 9 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.
