San Andrés is roughly 750 km from the Colombian mainland and about 230 km off Nicaragua, which explains most of what makes it unusual. The island is Colombian, but the Raizal community speaks English and an English-based Creole, the food is Caribbean rather than costeño, and the reef offshore is part of the Seaflower Biosphere Reserve — a UNESCO designation covering one of the largest protected marine areas in the hemisphere.
For divers, the short version is: warm water year-round, visibility routinely in the 20–30 metre range and often better, a genuinely large reef system, and prices meaningfully lower than comparable Caribbean destinations.
The tourist card, before anything else
Every non-resident visitor to the archipelago must buy a tarjeta de turismo — a tourist card — and it has to be purchased before you board your flight to San Andrés, at the departure airport. Airlines check for it at the gate. It is a departmental control mechanism and the revenue funds local development.
You need it again on departure. Losing it means buying a replacement to get off the island. Photograph it and keep the paper somewhere that is not your beach bag.
You will also encounter an airport departure charge on the way out. Have pesos.
Diving conditions
| Factor | What to expect |
|---|---|
| Water temperature | Warm all year, broadly 27–29°C. A 3mm shortie is plenty; many divers use a rash guard. |
| Visibility | Typically 20–30 m, frequently better on the western wall sites. |
| Current | Mild at most sites; stronger on the exposed eastern side and at some wall dives. |
| Depth range | Shallow reef from 5 m to wall dives beyond 30 m — suits everyone from open water to tech. |
| Best months | Diveable year-round. Hurricane season runs June to November; September and October are historically the least settled. |
Sites worth doing
Blue Wall (La Pared Azul)
The signature dive. A sheer drop-off on the western side plunging into deep blue, with excellent visibility and the open-water feeling that wall dives deliver. Advanced-level.
Nirvana / Piramide
Shallower coral gardens on the western side, sheltered and suitable for open water divers and training dives. Reliable for rays and turtles.
The wrecks
Several artificial and accidental wrecks sit off the island, including sunken vessels placed to build reef structure. Depths vary; most are accessible to advanced open water divers.
Cantil de Villa Erika
Another wall profile with dramatic topography and consistently good visibility.
Cayo Bolívar
An atoll roughly 25 km southeast — a full-day boat trip, and the closest thing to a genuinely remote dive from San Andrés. Sea conditions dictate whether it runs.
Snorkelling without a certification
The reef here is shallow enough in places that snorkelling is not a consolation prize.
- Rocky Cay — walkable and wadeable from shore at low tide, with a small wreck close in. The easiest reef access on the island.
- Johnny Cay — the small island off the north coast, reached by boat. Beautiful, busy, and more of a beach-and-music day than a snorkelling one.
- Haynes Cay and El Acuario — the shallow sandbank area where the water genuinely goes turquoise-on-white. Standard boat-tour stop; the rays there are habituated.
- West View — a cliff-and-ladder entry on the western coast with immediate reef access and a platform to jump from.
- La Piscinita — similar western-side entry, calm and shallow, good for a first look.
Booking and certification
San Andrés has a substantial dive-shop cluster, mostly PADI and SSI. Two-tank morning trips are the standard product, and multi-dive packages bring the per-dive cost down considerably. Open Water certification courses run continuously and are among the better-value places in the Caribbean to certify, largely because the conditions are so benign for training.
What to check before handing over money:
- Group ratio. Ask how many divers per guide. Six is comfortable; ten is a crowd.
- Equipment condition. Look at the regulators and BCDs, not the shop's signage.
- Insurance. Confirm what the shop's coverage includes and whether your own travel policy covers diving to your intended depth.
- Chamber access. Ask the shop where the nearest recompression facility is and what their evacuation procedure is. A good shop answers immediately.
- Flight timing. Standard no-fly interval after diving applies, and it catches people out on short island trips. Plan your last dive at least 18–24 hours before your flight.
Seaflower is a protected biosphere reserve and the reef is under real pressure from bleaching and visitor volume. Reef-safe sunscreen, no touching, no standing on coral, no shell or coral collection. Some of it is regulated; all of it matters.
Getting around, and Providencia
The island is small enough to circle in an afternoon. Golf carts, scooters and mototaxis are the standard rentals, and the coastal loop road is the main event. Rental competition is fierce; prices are negotiable, particularly for multi-day.
If you have the time, Providencia is a 30-minute flight or a catamaran ride away and is a genuinely different island — quieter, hillier, and sitting on the same barrier reef with even less pressure on it. See our separate guide to Providencia access and current status before you commit to the leg.
Practicalities
- Currency. Colombian pesos. Cash is preferred widely, though San Andrés has ATMs, unlike Providencia.
- Water. Drink bottled or filtered. The island's fresh water supply is constrained.
- Crowds. San Andrés is a major domestic holiday destination. December–January, Semana Santa and mid-year school holidays are busy and priced accordingly.
- Food. Rondón — a slow-cooked coconut milk stew with fish, breadfruit and yam — is the Raizal dish worth building a meal around.
Common questions
Do I need a tourist card for San Andrés?
Yes. Non-resident visitors must buy the tarjeta de turismo at the departure airport before boarding. Airlines check for it, and you need the same card again to leave the island.
Is San Andrés good for beginner divers?
Very. Water is warm year-round, visibility is long, and there are plenty of shallow, low-current sites suitable for training and early dives. It is also one of the better-value places in the Caribbean to certify.
What is the best time of year to dive San Andrés?
Diving works year-round. Hurricane season runs June to November, with September and October historically the least settled. Conditions on the western side are sheltered most of the year.
Can you snorkel without booking a tour?
Yes. Rocky Cay, La Piscinita and West View are all shore-accessible. Boat trips are needed for Johnny Cay, Haynes Cay and El Acuario.
How do you get to Providencia from San Andrés?
By short flight or by catamaran. Both sell out in high season and the catamaran is weather-dependent. There is no direct access to Providencia from mainland Colombia.