No, swimming in the Blue Cave Croatia is not allowed.
The Blue Cave (Modra špilja), located on Biševo Island near Vis, is a protected natural site. Entry is only permitted via official boat tours, and swimming is strictly prohibited due to safety concerns and environmental preservation.
Why Swimming Is Not Allowed in the Blue Cave
1. Narrow entrance and heavy boat traffic – The cave entrance is less than 2 meters high. Boats must enter carefully, and swimmers would be at risk.
2. Protected status – The cave is under natural protection laws. Human activity is limited to prevent damage to the cave walls and the iconic blue light effect.
3. Tourist safety – Currents inside can be unpredictable. Allowing swimming would endanger both swimmers and boat passengers.
What You Can Do Instead
Although swimming inside the Blue Cave is not possible, here’s how to still enjoy the area:
• Take an official Blue Cave boat tour – From Split, Hvar, Komiža, or Vis. Tours are short (about 15 minutes inside the cave), but unforgettable.
• Swim near Biševo – Popular beaches like Mezoporat and Porat Bay offer crystal-clear waters perfect for swimming and snorkeling.
• Explore nearby caves – Some tours also include Green Cave and Monk Seal Cave, where swimming is often permitted.
Best Time to Visit the Blue Cave
• Midday (11:00–13:00) is the best time to visit, when sunlight reflects off the seabed and illuminates the entire cave in blue.
• Peak season is June to September, so book tours early.
What to Expect on the Tour
• Short ride in a small boat inside the cave
• No swimming or touching the water
• Photography is allowed
• Total visit time: ~15 minutes inside the cave
Final Thoughts
The Blue Cave Croatia is a unique and delicate environment that deserves protection. Although swimming is not allowed, you can still fully enjoy the magic of this place through official tours and by exploring nearby swimming spots.
If you’re visiting Croatia’s Adriatic coast, don’t miss the Blue Cave—just leave your swimsuit for the beaches outside.
