A Dubrovnik boat tour is one of the best ways to experience the Adriatic coastline, hidden caves, and island beaches that make this stretch of Croatia unforgettable. Crystal-clear water, dramatic cliffs, and stops at places you simply cannot reach by land — it is easy to see why boat tours top every Dubrovnik itinerary.
But every summer we see the same avoidable mistakes ruin what should be a perfect day on the water. Some cost money. Some cost comfort. A few can derail the experience entirely.
Whether you are visiting Dubrovnik for the first time or coming back for another season, this list will save you time, money, and frustration. Here are the ten most common boat tour mistakes — and exactly how to dodge them.
1. Booking the Cheapest Option Without Checking Inclusions
A low price tag is tempting, especially when dozens of operators line the Old Town harbour. The problem is that rock-bottom tours often strip out the things that matter: snorkelling gear, drinks, lunch stops, national park entrance fees, or even fuel surcharges that appear at checkout.
Before you book, compare what is actually included. A tour that costs €20 more but covers lunch, equipment, and all fees is almost always better value than a bare-bones trip where you pay extra for everything on the day.
How we handle it: Every Blue Cave Tours Dubrovnik trip lists full inclusions upfront — no hidden costs, no surprises at the dock. Check our pricing page to see exactly what each option covers.
2. Not Bringing Sunscreen — You Are on the Water for 4+ Hours
This sounds obvious, but it catches people every single week. Reflection off the Adriatic roughly doubles your UV exposure compared with walking around the Old Town. A four-to-eight-hour tour means sustained, direct sun with minimal shade.
Pack SPF 50+ reef-safe sunscreen, reapply every two hours, and bring a hat. Your future self will thank you.
3. Not Checking the Weather Forecast
Croatian summers are largely sunny, but the Adriatic can shift fast. A sudden bura wind or afternoon thunderstorm can turn a calm sea into an uncomfortable ride — or force cancellations at the last minute.
Check the forecast the evening before your tour. Reliable apps like Windy or Yr.no give accurate coastal conditions for the Dubrovnik area. If conditions look marginal, a good operator will contact you proactively with options to reschedule. If yours does not, that tells you something about how they run their business.
4. Choosing the Wrong Time of Day — Afternoon Means Choppy Seas
Sea conditions in the Adriatic follow a predictable daily pattern. Mornings are typically glassy and calm. By early afternoon, thermal winds pick up and the water gets choppy, especially on the return leg when you are tired and possibly sunburned.
This is the single biggest factor in whether you enjoy the ride or spend it gripping the rail. Families with small children and anyone prone to seasickness should treat this as non-negotiable. If you have a choice, always pick the morning departure.
5. Not Pre-Booking in Peak Season — July and August Sell Out
Dubrovnik receives over a million visitors between June and September. In July and August, popular boat tours sell out days or even weeks in advance. Walking up to the harbour hoping to find a spot often means settling for whatever is left — if anything is available at all.
The fix is simple: book ahead. Our how-to-book guide walks you through the entire process, and you can reserve your spot online in under two minutes.
6. Forgetting Seasickness Medication
Even experienced sailors can feel queasy on a speedboat bouncing across open water. If you have any history of motion sickness — or if you are simply unsure — take precautions before you board, not after the nausea starts.
Over-the-counter options like dimenhydrinate (Dramamine) work well when taken 30 to 60 minutes before departure. Ginger tablets and acupressure wristbands are popular non-drowsy alternatives. Sitting toward the back of the boat and keeping your eyes on the horizon also helps.
7. Not Bringing Water Shoes for Rocky Beach Stops
Many of the best swim stops along the Dubrovnik coastline — Šunj beach on Lopud, the coves near the Elaphiti Islands — have rocky or pebbly entries. Stepping barefoot on sea urchin territory is a holiday-ending mistake.
A pair of lightweight water shoes takes up almost no space in your bag and makes every beach stop more comfortable. If you forget, some local shops near the harbour sell them, but the selection and sizes are hit-or-miss in peak season.
8. Expecting the Biševo Blue Cave from Dubrovnik
The famous Blue Cave on Biševo island is near the island of Vis — roughly 200 kilometres northwest of Dubrovnik. It is not reachable on a day trip from Dubrovnik, despite what some misleading advertisements suggest.
Dubrovnik has its own spectacular sea caves, grottoes, and blue-water swimming spots that are genuinely stunning. But if the Biševo Blue Cave is the specific reason you are booking, you need to be on the island of Vis or departing from Split. We are upfront about our tour routes and stops so you always know exactly what you will see.
9. Not Bringing a Waterproof Phone Case
You will want photos. You will be on a boat that hits waves. Spray, splashes, and the occasional rogue wave are part of the experience. A waterproof phone case costs under €15 and lets you capture everything without the gut-drop moment of watching your phone sink into the Adriatic.
Universal dry bags or clip-seal pouches work fine — you do not need anything expensive. Just make sure it is rated IPX8 and test it in the hotel sink before you leave.
10. Skipping the Morning Slot
This one deserves its own point because it ties together several mistakes above. The morning slot gives you:
- Calmer seas — wind and chop build through the afternoon
- Better light — morning sun illuminates caves and coastline beautifully
- Cooler temperatures — less sun exposure, more comfortable on the boat
- Fewer crowds — popular stops like Sunj beach are quieter before noon
- More energy — you return by early afternoon with the rest of the day free
If morning is available, take it. It is the single best decision you can make when planning your Dubrovnik boat tour.
How to Get It Right the First Time
Most of these mistakes come down to one thing: not having the right information before you book. That is exactly why we built Blue Cave Tours Dubrovnik the way we did — clear inclusions, honest itineraries, morning departures, and all the gear and guidance you need for a great day on the water.
Ready to plan your trip? Start with our how-to-book guide for a step-by-step walkthrough, or head straight to pricing to compare options and see exactly what is included with each tour. If you already know what you want, book your tour now and lock in your preferred date before peak season fills up.
Have questions before you commit? Our team is happy to help — get in touch and we will point you in the right direction.