Introduction

Looking for a family-friendly way to experience Croatia’s coastal waters without getting your feet wet? The Omi: Semi-Submarine Underwater Adventure offers a relaxing, accessible glimpse into the marine life and history beneath the sea. This tour is perfect for travelers who want to enjoy the ocean’s sights comfortably from a glass-enclosed boat.
One of the things we love about this tour is how it combines marine observation with a touch of history — spotting a sunken WWII ship adds a layer of intrigue. We also appreciate that it’s affordable, costing only around $16 per person, making it a great value for a half-hour ride. On the flip side, some travelers note that the experience may be less spectacular than expected if water clarity isn’t ideal or if marine life isn’t abundant during your trip.
This tour suits families, curious travelers, and anyone interested in a calm, guided underwater view. If you’re after a short, laid-back adventure that offers a different perspective on Croatia’s coastal waters, this semi-submarine trip will fit the bill.
You can check availability for your dates here:Key Points

- Accessible underwater viewing with a glass cabin, no swimming required.
- Affordable price around $16, offering good value for a unique experience.
- Focus on history with a view of a WWII sunken shipwreck.
- Marine life sightings include fish, octopuses, and jellyfish, though visibility varies.
- Nighttime illuminations enhance the experience after dark.
- Small group size of up to 12 people creates an intimate atmosphere.
- Family-friendly activity suitable for all ages, especially kids.
- Booking in advance recommended for secure spots and flexibility.
You can also read our reviews of more tours and experiences in Omis.
What to Expect from the Semi-Submarine Adventure

This experience offers a gentle, 30-minute ride in a vessel equipped with a glass underwater cabin. The semi-submarine doesn’t dive — it simply floats along just below the surface, giving you a safe, comfortable view of the underwater scene. The vessel departs from Omi’s new port, and once underway, you’ll settle into your seat and enjoy the panoramic views through the thick glass.
The Journey and the Shipwreck
Your ride centers around observing a sunken WWII ship, placed just below the sea surface. Depending on tide and visibility, parts of the ship’s deck may be only half a meter underwater and partially buried under sand. Some reviews mention that the ship is clearly visible and that it adds a historical layer to what would otherwise be a standard marine tour.
While some travelers express disappointment with water clarity — “Expected clearer water and more fish,” one reviewer notes — others find the shipwreck a highlight, especially if you’re interested in maritime history. Remember, the ship is surrounded by underwater lights, which make night viewing especially special, casting a dramatic glow over the wreck and marine life.
Marine Life and Sightings
As you glide along, you’ll have opportunities to spot fish, and if you’re lucky, you might see octopuses and jellyfish. The experience relies heavily on natural conditions, so sightings can vary. The illuminated waters at night, paired with the glow of bioluminescent creatures, can turn this into a magical visual experience.
More Great Tours NearbyGroup Size and Atmosphere
With a capacity of only 12 people, the tour maintains an intimate setting, allowing everyone a clear view and a chance to ask questions. This smaller size also means more personalized attention from guides, which some reviews praise as “knowledgeable” and helpful.
Duration and Practical Details
The half-hour tour is brief but packed with sights and stories, making it a good option for travelers with tight schedules or those wanting a quick but memorable adventure. The semi-submarine itself does not include food or drinks, so plan accordingly if you want refreshments afterward.
Night Experience and Lighting
One of the tour’s most praised features is the underwater lights during night rides. These lights turn the underwater world into a mesmerizing scene of shimmering fish and glowing wreckage. Night trips tend to be more visually striking, though water clarity will still influence what you can see.
Is It Worth the Price?

At just $16 per person, this tour offers a compelling value. While it’s short, the chance to see a WWII shipwreck and enjoy marine life from a safe, comfortable spot makes it worth considering, especially for families or those seeking a low-effort introduction to Croatia’s underwater scenery. It’s a great way to add a fascinating twist to your coastal itinerary without the expense or effort of snorkeling or diving.
Authentic Insights from Travelers

Many travelers appreciate the value and accessibility of the tour. One describes it as “alles perfekt,” praising the experience wholeheartedly. Others, however, express more reserved opinions; for instance, some expected more fish and clearer water, suggesting that natural conditions can influence satisfaction. One reviewer noted that the shipwreck was the main highlight, but they wouldn’t repeat the experience unless water conditions improved.
Some guests mention that since the vessel doesn’t dive and only floats just below the surface, it’s less appealing if you’re expecting an immersive underwater adventure. Also, those with claustrophobia should consider whether the enclosed cabin might feel tight. The experience is designed to be family-friendly and relaxing rather than adventurous or intense.
Practical Tips for Visitors

- Book in advance: The small size of the boat means spots fill up quickly, especially during peak season.
- Consider the timing: Night rides provide a more dramatic view thanks to underwater lighting.
- Prepare for water conditions: Water clarity and marine life sightings depend on weather and tides, so don’t expect a guarantee of abundant fish.
- Bring a camera: The views through the glass are photogenic, especially the shipwreck at sunset or under night lights.
- Arrive early: To ensure a comfortable boarding process and find a good seat.
Who Should Consider This Tour?

This activity is ideal for families with children, history buffs, and marine life enthusiasts seeking an easy, safe way to see underwater sights. It’s also a great choice for travelers who want a short, affordable, and nature-focused experience without the hassle of water gear or diving certification.
If you’re after a longer or more active marine adventure, you might find this tour a bit limited. Conversely, if you prefer a relaxed, guided experience with minimal effort, it hits the mark perfectly.
The Sum Up
The Omi Semi-Submarine Underwater Adventure offers a charming, accessible way to experience Croatia’s underwater world. While it may not rival more immersive diving excursions, it provides a safe, family-friendly introduction to marine life and shipwrecks for a very reasonable price. The small group size, night lighting, and historical highlight of the WWII wreck make it stand out as a unique coastal activity.
For travelers who appreciate a peaceful, guided view of the sea from comfort, this tour delivers authentic moments directly through its glass cabin. It’s especially well-suited for families, history enthusiasts, or anyone looking to add a distinctive touch to their Croatian holiday without too much effort or expense. Just remember, natural conditions can influence what you see — but the experience of floating just beneath the surface and witnessing a sunken ship is still pretty memorable.
FAQ

How long is the semi-submarine tour?
The tour lasts approximately 30 minutes, offering a quick but engaging glimpse beneath the water’s surface.
Does the semi-submarine actually dive?
No, the vessel does not dive. It floats just below the surface, giving you a view of the underwater world through the glass cabin.
Is this activity suitable for children?
Yes, it’s described as family-friendly and suitable for all ages, especially kids who enjoy marine sights without the need for snorkeling or diving.
What can I expect to see?
You’ll mainly view a sunken WWII ship and potentially marine creatures like fish, octopuses, and jellyfish, depending on conditions.
How good is the water clarity?
Some reviews mention that water clarity can vary, with expectations of clearer water and more fish not always being met. Visibility depends on natural factors.
Is the experience at night more impressive?
Many travelers find nighttime illumination adds a magical touch, especially with the underwater lights accentuating the shipwreck and marine life.
What is the group size?
The vessel holds up to 12 people, making for an intimate and personalized experience.
Do I need to book in advance?
Yes, booking ahead is recommended to secure your spot, as spaces are limited and popular.
Are food and drinks included?
No, the tour does not include food or drinks, so plan accordingly if you want refreshments afterward.
Can I cancel my booking?
Yes, you can cancel up to 24 hours in advance for a full refund, offering some flexibility in planning.
In brief, this semi-submarine tour in Omi provides a relaxed, inexpensive, and visually appealing way to explore Croatia’s underwater scenery. It’s best enjoyed by those who value a gentle, guided experience with a touch of history and marine life — simple, straightforward, and worth considering for a memorable coastal outing.
You can check availability for your dates here:More Tour Reviews in Omis
Not for you? Here's more nearby things to do in Omis we have reviewed
- Omi: Jet Ski Rental with Instructions
- From Omi: Half-day boat trip to Bra island with lunch
- Iz Omisa: Extremni Canyoning na rijeci Cetini/ Free photos
- From Omi: Krka Waterfalls and Trogir Group Tour
- Omi: Free Climbing gear, Daily Rental
- Omi: 2-Hour Cetina River Boat Tour and Nature Park Visit
- Omi: Cetina River Canyon Glass Boat Tour to Radman Mills
- Omi/Split Expedition: 65 km Quad Tour to Hidden Waterfalls
- From Split/Omi: Canyoning Cetina River + Free Photos/Video
- Omi, Croatia: Rent a Kayak on the Cetina River
- Omi: Beach & Fort Private Tour- ideal for cruise guests
- Iz Omisa/Zadvarija: Extremni Canyoning na rijeci Cetini
