Kotor Bay: Blue Cave Swim, Submarine Tunnels & Our Lady of the Rocks

Speed across Kotor Bay to swim in the Blue Cave and wander Our Lady of the Rocks

You’ll zip across Kotor Bay by speedboat with a local skipper, swim through glowing water inside the Blue Cave, peer into WWII submarine tunnels, and step onto Our Lady of the Rocks island where legends linger in every stone. Expect laughter, chilly swims, stories you won’t read online, and moments that stick with you long after you dry off.

Step-by-step itinerary

Stops and time spent at each

1. Bay of Kotor2h
2. Blue Cave25m
3. Our Lady of the Rocks20m

Speed boat tour of Kotor Bay highlights

• Trip along Kotor Bay coastline
• Swim and dip inside Blue Cave
• Stop next to Mamula Island prison
• Visit submarine tunnel from WWII
• See Our Lady of the Rocks island

The experience

The first thing I noticed was how salty the wind tasted as we sped out into Kotor Bay: honestly, I gripped the rail tighter than I’d like to admit. Our skipper, Marko, just grinned at us and pointed out a cluster of old stone houses along the shore. He knew every twist in that coastline, he grew up here, and he kept tossing little stories our way about fishermen and how his grandfather used to row across these same waters. The engine’s hum mixed with seabirds overhead, and for a second it felt like we were chasing something ancient.

I didn’t really expect to swim into the Blue Cave. But when we anchored just outside, Marko handed me a bottle of water (included, nice touch), told us it was safe, and said “You’ll see why they call it blue.” The water was cold enough to make me gasp, but inside…well, it glowed. Not in a dramatic way. Just this soft blue shimmer everywhere, bouncing off the walls and your own arms. My friend tried to take a photo but gave up. You kind of have to be there. We floated for a bit in silence except for someone laughing nervously nearby (not me this time).

On the way back, we stopped near Mamula Island: Marko pointed at the old prison there and shrugged like he’d told this story too many times. It looked lonely out there. Then those submarine tunnels from WWII. I stuck my head inside one and it smelled damp and metallic, like old secrets or something left behind. We finished at Our Lady of the Rocks island where locals still light candles for luck. I watched an older woman do just that while our guide explained how fishermen built this place stone by stone. There’s a tiny museum with sea-worn paintings inside if you want to look around (small fee). I still think about that view from the dock: sun bouncing off all that pale stone, boats drifting past so slowly you almost forget you’re on a tour at all.

What’s included

Your day includes bottled water for everyone on board as you travel by private speedboat across Kotor Bay with stops for swimming in the Blue Cave and exploring historic sites before returning to port.

Options for this experience

2 options

Three-hour private speedboat trip to the Blue Cave and Our Lady of the RocksUp to 6 per booking · Guide in English · 09:00, 12:00, 15:00 and 18:00Pickup is included

Private tour for a maximum of 10 peopleUp to 9 per booking · Guide in English · 09:00, 12:00, 15:00 and 18:00

You'll see the exact price of each option when you check availability.See dates and prices

Before you book

Days and timesFriday and SaturdayDepartures at 09:00, 12:00, 15:00 and 18:00

Book up toStart time

GroupPrivate

Live guideEnglish

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.You can choose from 31 pickup points.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather or if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Paid on site€ 5

Prices and times updated 2 days ago

Good to know

Low physical effortStroller-friendlyPets welcomePublic transport nearbyInfants must sit on laps

Operated by Sea Dog Speed Boat Tours

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Top questions

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

How do you get into the Blue Cave on this tour?

You reach the Blue Cave by swimming from the boat. Speedboats don’t enter directly.

Is bottled water included during the speed boat tour?

Yes, bottled water is included for all guests on board.

Can infants join this private speed boat tour?

Yes, infants can join but must sit on an adult’s lap. Strollers are allowed too.

Do you go inside Our Lady of the Rocks church?

You can enter for a small fee. There’s also a museum attached if you want to visit.

Are service animals allowed on this tour?

Yes, service animals are allowed during this experience.

How long does this private speed boat tour last?

The tour lasts approximately 3 hours from start to finish.

What historical sites are visited during this day trip?

You’ll see Mamula Island (former prison), WWII submarine tunnels, and Our Lady of the Rocks island.