The Bay of Cartagena: The Boat Day, the Route and What It Costs

Updated: 21 September 2026 · Written by Marta Fernández, founder of CABÚ Viajes, local operator in Cartagena de Indias (RNT 215668). We charter directly with the owners and captains — no agency fee.

In short: the Bay of Cartagena is the huge natural harbour the city was built to defend, and it is the water you cross on the way to everywhere else. A private full day on it runs 850 to 3,800 USD for the boat, not per person, leaving from a dock about ten minutes from the walled city. The standard day departs at 9am and is back by 5pm, taking in the bay, Tierra Bomba, the Vázquez lagoon on Barú and the Rosario Islands national park, with lunch on the way.

What the bay actually is

A deep, sheltered natural harbour — one of the best on this coast, which is exactly why Spain fortified it for two centuries and why the walls exist at all. It is large enough that crossing it feels like being at sea, and protected enough that it stays calm on days when the open water outside is not. Two narrow entrances connect it to the Caribbean; the forts that guarded them still stand at Bocachica.

For a visitor the practical point is this: the bay is not a destination you go to, it is the water everything else sits on. Tierra Bomba is inside it, twenty minutes from the dock. Barú and the Rosario Islands are beyond it. A boat day in Cartagena is really a bay crossing followed by whatever you chose at the other end.

The bay day and the island day are not the same trip

	A day on the bay	A day at the islands
Where	Inside the harbour: Tierra Bomba, the forts at Bocachica, the city from the water	Beyond it: the Rosario archipelago, Cholón on Barú
Water	Calmer, darker — this is a working harbour	Clear, open Caribbean
Time	Twenty minutes to the first stop	35–45 minutes out
Suits	A half day, a sunset, a group with small children or anyone uneasy on open water, or a day when the sea outside is rough	The full swimming day most groups come for

Most full days do both, and that is the usual answer: out across the bay in the morning, the islands in the middle of the day, back through the bay at the end with the city coming up in front of you. It is the best view of Cartagena there is, and it happens to be free.

The standard full day

• 9:00 — departure from the dock. Arrive thirty minutes early; boats leave on time because the port clearance is issued for a window.
• Morning — across the bay, past Tierra Bomba and the fortifications at the mouth.
• Midday — the Vázquez lagoon on Barú, then on to the large islands inside the Corales del Rosario national park.
• Lunch — on board or at a beach club, depending on what you booked. Beach clubs charge a minimum spend per person, separate from the charter.
• Afternoon — swimming and the slow part of the day.
• 17:00 — back at the dock.

The route moves with the weather and the sea. That is normal and it is written into every quote: if conditions change, the captain changes the plan, and a captain who will not is not one to go out with.

What it costs

Item	How it is charged
Private charter, full day	850–3,800 USD per boat by size: 850–1,500 for a 36–40ft speedboat up to about twelve; 1,500–2,500 for a 45–50ft comfortable for fifteen to twenty; 2,500–3,800 above that
Beach club	A minimum spend per person, separate from the charter
Food and drink on board	Quoted separately, or brought with you

Because the boat is billed per boat, the cost per person falls as the group grows: the same 36–40ft boat is 250 USD each across six people and 125 each across twelve. The charter page has the full breakdown by boat size — and the honest explanation of what a "yacht" means here, because most of the fleet advertised that way is a 36 to 48-foot speedboat.

What we check before a boat goes in a quote

US travel advice for Colombia warns specifically about small tourist boats to the islands, and the warning is fair: the fleet is large and not all of it is compliant. Four things, in writing, every time:

1. The captain's licence, valid and in his own name.
2. Passenger liability insurance on the vessel, not just hull cover.
3. The port clearance (zarpe) for that day, which is refused when the sea is unsafe.
4. Maximum legal capacity, with your group fitting inside it and the crew counted.

We send all four with the quote. If another operator will not, that answer is the information you needed.

Frequently asked questions

Planning the rest of the trip

• Private yacht and boat charter: real prices by size, and what a "yacht" actually is here.
• The Rosario Islands: private boat versus shared, and what the day costs.
• A staffed villa inside the walls: from about 600 USD a night for a house sleeping 16, with the staff itemised.
• A local concierge running the days, included at no extra charge.
• Who we are and how to verify any operator before paying a deposit.