What the Blue Cave Is
The Blue Cave (Plava Spilja) sits in the cliffs on the seaward side of the Lustica Peninsula, near the entrance to the Bay of Kotor. It is a sea-level grotto roughly thirty metres deep where sunlight enters through an underwater opening and refracts upward, flooding the interior with an intense cobalt-blue glow. The effect is strongest between mid-morning and early afternoon when the sun is high and the water is calm.
Unlike the famous Blue Grotto on Capri, this cave is still relatively uncrowded. Small boats carry groups of six to ten passengers from the beach at Zanjice, and the round trip takes roughly forty-five minutes including time to swim inside the cave. The experience is simple, affordable, and genuinely striking — the colour of the water inside bears no resemblance to anything you see from the shore.
The Drive from Herceg Novi
From Herceg Novi centre take the main road west toward Igalo, then follow signs for Lustica and Rose. The road climbs through the village of Djenovici and continues along the spine of the peninsula through olive groves and pine forest. After roughly twenty-five minutes you reach the turn for Zanjice Beach. The final section descends steeply to the coast — the road is narrow but paved and in good condition. Total driving time from Herceg Novi is approximately thirty minutes.
Zanjice Beach
Zanjice is a small pebble beach backed by a handful of restaurants and a car park. It faces south toward the open sea and is one of the cleanest swimming spots on this part of the coast. The beach has sunbed rentals, a couple of casual restaurants serving grilled squid and cold drinks, and the boat operators who run trips to the Blue Cave and Mamula Island. Arriving before 10am in summer secures both a parking spot and a place on the first boat departure.
The Boat to the Cave
Boats depart from the eastern end of Zanjice Beach throughout the day in season (roughly May through October). The crossing takes about fifteen minutes each way. Most operators offer a combined trip that includes the Blue Cave and a loop past Mamula Island — see our guide to Mamula Island fortress.
Inside the Cave
The boat enters the cave through a wide opening in the cliff face. Inside, the cave widens into a chamber roughly twenty metres across. The water glows an electric blue that intensifies as your eyes adjust to the lower light. Passengers can swim in the cave — the water is deep, clear, and surprisingly warm in summer. The boat stays for ten to fifteen minutes before returning to Zanjice. Bring a waterproof phone case or a GoPro; the blue light photographs well but smartphones struggle without protection from the spray.
What to Do After
Spend the rest of the morning on Zanjice Beach, or continue driving along the Lustica Peninsula to the village of Rose at the tip. From there you can loop back through Krasici to Herceg Novi, making a full peninsula circuit. Alternatively, head north toward the Croatian border for a very different kind of drive — see our guide to driving the Prevlaka Peninsula.
Practical Tips
- Best time: 10am–1pm for the strongest blue light effect inside the cave. Calm seas are essential — boats do not run in rough weather.
- Swimming: Wear your swimsuit under your clothes. You will want to jump in once you see the water colour.
- Parking: Small car park at Zanjice, €3–5 in summer. Fills by mid-morning in July and August. Arrive early.
- Payment: Boat operators accept cash (euros). Some now take cards but do not rely on it.