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Lake Bohinj is in the mountain range of the Julian Alps in the Triglav National Park. As such, the weather can change very quickly. It is located in a glacial valley . The steeply descending lake basin is relatively smoothly shaped and has no shallow areas. However, in general, expect warm summers (around 25°C+) and Cold winters, perfect for outdoor activities such as skiing. In winter, the lake freezes sometimes. The water level rises 2 – 3 metres after heavy rainfall.

Best time to Visit –

The warmest months to visit are July and August. As such, these are the busiest months, although it is never as busy as many other holiday tourist destinations. This is the best time of the year to be able to make the most of all the things to do at Lake Bohinj.

Spring and autumn are quieter seasons offering warm weather (late teens to early 20°C) and are perfect for hiking. Gorgeous flowers abound in the meadows surrounding Lake Bohinj in spring.

Things to do –

There are an abundance of things to do at Lake Bohinj, all set within an oasis of calm, making it the perfect place for a relaxing holiday. Many of our suggestions can be combined to make a great day out or can be spread over a number of days.

Good combinations include:

Tourist boat across Lake Bohinj → Walk back
Tourist boat across Lake Bohinj → Hike up to the Savica Waterfall → Tourist boat back/walk back
Hire a kayak or stand-up-paddle board (SUP) on Lake Bohinj → Swim
Swim in Lake Bohinj → Mostnica Gorge

Lake water is restored three times per year. The main tributary is the Savica, and the main distributary is the Sava Bohinjka. More than a third of the water flows into the lake from the Karst springs under the lake surface along the northern shore. During heavy rainfall, the Karst waters gush out as the Govic spring on the Pršivec hillside.

At the end of the last glacial period, Lake Bohinj was about 18 metres higher, extending all the way to the village of Stara Fužina.
Only one-tenth of Lake Bohinj is shallower than 10 metres, and as much as 80 % is deeper than 20 metres, with 20 % even deeper than 40 metres.
There is a lacustrine chalk deposit between the hamlet of Sveti Duh and the Pod Skalco event area.
To the south side of Sveti Duh, there is also one of the few quartz porphyry deposits in the Julian Alps.
Lake Bohinj is home to 53 planktonic algae species, around 60 species of the freshwater zoobenthos and at least 16 fish species.
Jezernica, the second shortest river in Slovenia, flows from Lake Bohinj, and after it joins the Mostnica river (100 metres from the bridge), it is called the Sava Bohinjka.