Biševo Island – Blue Cave, Sandy Beaches and Hidden Part of the Vis Archipelago

Biševo is a small offshore island located southwest of Vis, opposite Komiža, best known for the famous Blue Cave. However, to reduce Biševo to just a few minutes spent in the blue interior of the cave would mean missing out on much of what makes this island special. Behind its most famous attraction lie sandy coves, old paths between small island settlements, vineyards, the Church of St. Sylvester, an unusual geological history, and life on an island that today has only about twenty permanent residents.

Biševo has an area of 5.91 km², is approximately four kilometers long and up to two kilometers wide. The highest point is Stražbenica, 239 meters above sea level. The island is small enough that distances on the map seem short, but the terrain, ascents, and summer heat mean that sufficient time should be allocated for walking tours.

Biševo is part of the UNESCO Global Geopark Vis Archipelago, along with Vis and offshore islands and islets such as Sveca, Brusnik, Jabuka, and Palagruža. It is evident on Biševo how the sea, limestone, tectonic processes, and wind have shaped the current landscape, caves, and unusual sandy areas of the island over a long period.

Blue Cave – The Most Famous Attraction of Biševo

The majority of visitors come to Biševo for the Blue Cave, located in Balun Cove on the eastern side of the island, about 4.5 nautical miles or 8.3 kilometers from Komiža. The cave is approximately 24 meters long and 10 to 12 meters wide, and its well-known blue-silver color occurs when sunlight penetrates through an underwater opening and reflects off the bright bottom into the cave.

Entry is possible by small boats through a very low natural opening, about 1.5 meters high and 2.4 meters wide. Therefore, visiting the cave also depends on sea conditions – when the waves are too high, safe entry is not possible. The Blue Cave has been protected as a geomorphological natural monument since 1951. Organized visits depart from the nearby Mezuporat Cove.

The cave was introduced to the wider European public in 1884 by Austrian painter and explorer Eugen von Ransonnet, after which Biševo became known far beyond Vis and Dalmatia. Today, the Blue Cave is one of the most visited natural attractions in this part of the Adriatic.

If one wishes to see only the Blue Cave, it is sufficient to join an organized excursion from Komiža. However, to truly experience real Biševo, it is worthwhile to stay on the island after visiting the cave and explore beyond Mezuporat.

Mezuporat – The Gateway to Biševo and Starting Point for the Blue Cave

Mezuporat is a small cove on the eastern side of the island and the main place where a large number of visitors to the Blue Cave arrive. Here, visitors transfer to small boats that enter the cave, and the cove is also connected to the rest of the island. The Komiža Tourist Board lists Mezuporat as one of the main locations on Biševo.

In the sea in front of Mezuporat, an ecological mooring system is used to reduce anchoring on seagrass meadows. This serves as a good reminder that Biševo, despite the large number of daily visitors to the Blue Cave, remains a sensitive island area where tourism must be adapted to nature, not the other way around.

Nearby is the Visitor Center Blue Cave – Biševo, dedicated to the natural, geological, and cultural heritage of the island. The center provides a much broader picture of Biševo than what is gained during a brief visit to the cave.

Porat – The Most Famous Sandy Beach on Biševo

On the western side of the island lies Porat, a deeply recessed and well-protected cove with one of the most beautiful sandy beaches in the area of Vis and Biševo. Unlike most beaches in Vis, which are dominated by pebbles and rocks, Porat has a sandy shore and shallow, clear waters. The Komiža Tourist Board also officially lists it as Biševo's sandy beach.

Porat is therefore a good choice for longer swimming after visiting the Blue Cave. The cove is surrounded by slopes and greenery, and the atmosphere is completely different from the busy Mezuporat during peak summer crowds.

Porat can be reached by boat, but also by land through the interior of the island. The combination of the Blue Cave, walking across Biševo, and ending the day at Porat provides a much more complete experience of the island than a classic quick excursion.

Salbunara – Sand, Peace, and Unique Nature of Biševo

Not far from Porat is Salbunara, another of the most beautiful parts of Biševo. The very name is associated with sand, which is one of the island's greatest features.

The sand on Biševo is not only interesting to bathers. Geological studies show that it was brought during ice ages by strong winds when sea levels were significantly lower than today. These deposits have left fertile soil and sandy coves that distinguish Biševo from most neighboring Adriatic islands.

The Salbunara area is particularly valuable due to its vegetation. Sea lilies grow in the sand, and rare and endangered plant species have been recorded, including a plant that occurs naturally only on Biševo. Therefore, plants and flowers in sandy areas should not be picked.

For swimming and a quieter stay, Salbunara is one of the parts of the island worth including if staying on Biševo for more than a few hours.

Medvidina Cave – Protected Cave of the Mediterranean Monk Seal

On the southern coast of Biševo, in Trešjavac Cove, lies Medvidina Cave. It is about 160 meters long and is considered the longest semi-submerged marine cave in the Adriatic. It is named after the Mediterranean monk seal, which the locals referred to as "sea man," and which once used the cave as a shelter and a place to raise young.

Medvidina Cave has been protected as a geomorphological natural monument since 1967. Entry is not allowed today: due to the protection of the sensitive habitat and the danger of landslides, strict restrictions have been introduced, so this location should be viewed as a protected natural space, not as another tourist cave like the Blue Cave.

Poje, St. Sylvester, and the Interior of Biševo

Those who venture inland from the coast will quickly see a completely different Biševo. The houses are not clustered in one large settlement but are scattered across smaller locations and around old agricultural areas.

In Poje, there was an island school built by the residents in 1937. The school operated until 1961, when it was closed due to the declining number of children. Today, the story of the school is one of the best indicators of how life on Biševo has changed during the 20th century. Before World War II, several hundred people lived on the island, while today the permanent population counts only about twenty individuals.

Even deeper into history is the Church of St. Sylvester. The Benedictine community on Biševo was established as early as 1050, when a priest named Ivan from Split built a church on the island and handed it over to the Benedictines from the Tremiti Islands. The Biševo Abbey later had estates on Vis and Hvar and was an important part of the history of this offshore area for centuries.

The current appearance of the church is the result of later renovations; the Komiža Tourist Board dates the present structure to the 16th century, and mass is held there on the feast day of St. Sylvester.

Biševo Geostaza – The Best Way to Explore the Island on Foot

If staying on Biševo long enough, one of the best ways to get to know the island is through the Biševo Geostaza. It connects not only geological attractions but also the story of the people, vineyards, the old school, the church, caves, sandy deposits, and plants that have developed in this isolated space.

Walking on Biševo best shows how different the island is from the image received by a traveler who arrives by speedboat, enters the Blue Cave, and immediately returns to Vis. The interior lacks urban hustle and the classic tourist infrastructure. Among the houses, dry stone walls, low vegetation, and former vineyards, the character of a small offshore island is still felt.

In summer, it is important to carry enough water, sun protection, and good footwear. Biševo does not have its own public water supply system, and drinking water for the population is still delivered to the island, which is another good reason not to set off on a full-day excursion without your own water supply.

How to Get to Biševo

The main starting point for Biševo is Komiža on the island of Vis. During the tourist season, numerous organized excursions and private boats depart from Komiža to the Blue Cave and other coves of Biševo.

Biševo is also connected to Komiža by the regular state boat line 612 Komiža – Biševo – Komiža. This is a passenger boat line, not a ferry for car transport. The schedule changes between the season and the rest of the year, so it should be checked on the official websites of the City of Komiža or the Coastal Line Shipping Agency before traveling.

For a one-day tourist visit, the simplest option is an organized excursion from Komiža. If you wish to walk around the island, visit Porat or Salbunara, and see more than just the Blue Cave, the regular boat line or pre-arranged transport offers much more freedom.

Biševo does not have a ferry connection for cars. There are local roads and vehicles of residents on the island, but for visitors, Biševo is primarily an island to be explored on foot and by boat.

When is the Best Time to Visit Biševo?

Summer is the easiest time to arrive due to the largest number of boat excursions, warm sea, and swimming at Porat and Salbunara. At the same time, this is when the highest number of visitors is around the Blue Cave.

If the goal is to experience the quieter side of the island, interesting months are June and September, when the days are still long enough for walking and swimming, and the pressure from day-trippers is usually lower than at the peak of the season.

When traveling by boat, one should always consider sea conditions. Biševo is an offshore island, and wind and waves can affect the regular line, tourist excursions, and the possibility of entering the Blue Cave. Therefore, it is advisable to check the weather forecast and current sailing information shortly before departure.

Biševo is More Than Just a Trip to the Blue Cave

The Blue Cave is the reason why Biševo is known worldwide, but the best experience of the island begins only when one stays a little longer after visiting the cave.

Swimming at the sandy beach in Porat, the tranquility of Salbunara, walking towards Poje and St. Sylvester, and observing the dry stone walls and abandoned agricultural areas reveal another side of the island – one that is not seen during a quick speedboat trip.

Biševo is a small island, but within just a few square kilometers, it connects two protected marine caves, sandy beaches that are rare in this part of Dalmatia, nearly a thousand years of documented history, and a very small number of people who still maintain life on the island. For this reason, it is worth spending more time here than just a visit to the Blue Cave.