Diving Montezuma: volcanic rocks, Tortuga Islands and tropical life

Montezuma is a laid-back coastal base for boat diving in Tambor Bay and around the Tortuga Islands. Underwater, the attraction is volcanic rock, sandy ground and tropical fish life rather than a dependable wall of clear water. Turtles, rays, morays, octopuses and lobsters give the dives their character, while the village brings waterfalls, beaches and forest walks once the boat is back. It suits a land-based holiday where diving shares the timetable with the rest of the Nicoya Peninsula.

The usual plan is a boat day from Tambor or another harbour in the bay, rather than a departure straight from Montezuma beach. Around the Tortuga Islands, expect rocky volcanic bottoms alternating with sand, schools of fish and the occasional turtle working across the scene. Currents are variable, so the feel can range from an unhurried look around the rocks to a more active finning dive, but this is not a destination built around a predictable drift dive or downcurrent run. Visibility is the practical compromise. It can be pleasant in the dry season, but coastal runoff and nutrient-rich water during the rainy season may turn it down. Think tropical life in changeable water, not the consistently clear conditions of a remote ocean site.

Turtles are a regular possibility throughout the year, alongside rays, morays, octopuses, lobsters and busy schools of fish over the rocks and sand. The attraction is the amount of movement in an otherwise straightforward underwater landscape: fish stream over the bottom while a moray or octopus occupies a crevice. Whale and dolphin sightings vary, and belong as much to the boat journey as to the dive itself. Whale sharks are an occasional bonus, with local sightings particularly associated with August, not a sensible reason to build the whole trip around one encounter. The green season can bring poorer visibility but more nutrients, which may increase activity below the surface while reducing the number of visitors above it.

December to April is generally the easiest window, when the sea tends to be calmer and visibility better. That is the dry season, and it also brings the greatest tourist traffic, especially around boat trips to the Tortuga Islands. From May to November, the rainy season sends more runoff into the coastal water. Visibility may suffer, but the extra nutrients can make the underwater scene livelier and the village less busy. There is no need to write off these months, provided the itinerary leaves room to move a dive when the sea or visibility turns against you.

All levels can find suitable diving here, and no specialist certification is required beyond the diver’s normal training, whether that is BSAC, PADI or SSI. The more important question is comfort with boat diving, changing visibility and variable current. Beginners should expect a proper briefing and a flexible approach to conditions, while experienced divers should leave the idea of a technically demanding site or guaranteed clear water at home. This is a place for observing tropical life, not chasing depth.

From London Heathrow, Gatwick or Manchester, the practical route is to reach San José, then continue overland to Puntarenas. The structural part of the journey is the Puntarenas to Paquera ferry, which takes roughly 75 to 90 minutes. From Paquera, the road to Montezuma takes about 50 minutes, with onward connections through Cóbano. Buses link Puntarenas, Paquera, Cóbano and Montezuma, while a domestic flight may shorten part of the peninsula journey, but the final approach remains by road. Ferry times can change, so leave room between the crossing and any bus or road transfer. In Montezuma, the compact centre is walkable, but diving often means arranging a shuttle or taxi to Tambor or another embarkation point.

Confirm the embarkation point before booking your room. A boat sold as a Montezuma dive may leave from Tambor or elsewhere in the bay, so arrange the road transfer with the diving schedule rather than assuming you can walk to the boat. Keep a spare day for diving, particularly in the rainy season, when runoff can reduce visibility and the sea may upset the plan. Do not compare the water too casually with Cocos Island or a distant ocean reef. Montezuma’s appeal is the fish life and tropical encounters in changeable coastal water. If using public transport, plan the ferry, Paquera, Cóbano and Montezuma connections ahead, and keep extra time for the return to Puntarenas. Missing the ferry can disrupt the whole journey towards San José. Avoid placing a flight or long transfer immediately after diving, and treat whale sharks, whales and dolphins as fortunate sightings rather than appointments.

Allow five to seven days on the ground. That gives the boat schedule some flexibility and leaves time for Montezuma’s waterfalls, beaches, forest walks and wildlife excursions. The village centre is compact, with some accommodation and local services within walking distance, but the diving logistics are separate because boats commonly use Tambor or another harbour. Non-divers have plenty to do, from kayaking and boat trips to exploring the beaches and the Cabo Blanco area.