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

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Free cancellationTravelers' pick

1/10

Duration3h

GroupPrivate

LanguagesEN

PickupAt your hotel

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

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.

Good to know

Easy physical levelStroller friendlyPets welcomePublic transport nearbyInfants must sit on laps

Operated by Sea Dog Speed Boat Tours