Diving in El Hierro

El Hierro is the youngest of the Canary Islands, and its seabed is still mostly raw lava. Within 300 m of the coast the bottom falls past 200 m, and the lava along the way has set into walls, arches, tunnels and pinnacles, with black coral on the deeper faces. Reef-building coral does not grow here. Nearly everything is dived from La Restinga, a one-street fishing village at the southern tip, on zodiacs that reach most sites in under 15 minutes.

Those dives sit mostly inside the Reserva Marina de La Restinga, created in January 1996 along the sheltered southwest coast known as Mar de las Calmas; official figures for its surface range from 750 to 1,180 ha. El Bajón is the dive people fly in for: a twin-peaked volcano rising from sand at about 100 m to summits 6 to 9 m below the surface, with vertical walls and overhangs where amberjack, dusky grouper and barracuda gather in the current. Divers report current on nearly every dive there, and it runs only when swell, wind and buoy space allow. Baja Rosario is a shallow shoal rising to 7 m, where a smalltooth sand tiger shark was reported in August 2025 after about six years without a record. The inner reserve then reads as a tour of lava forms: El Saltu's small caves and light-ray tunnel, La Cueva del Diablo's skylit cavern with angel sharks on the sand outside, El Desierto's drop from sand to twisted lava, Punta Restinga's arches and shelves with several route choices.

When the Alisios drop, the exposed east coast opens: Baja Bocarones, a volcanic tower with angel sharks and rays; El Río, a submerged lava channel; Roque de Bonanza, a dyke you can swim around. Life outside the headline sites is steady but not dense, and divers expecting tropical numbers are often disappointed. What holds up is relief, visibility that is commonly over 30 m, small groups and almost no crowds. Repeat visitors rate the night dive from the La Restinga pier, at 0 to 12 m with rays, cuttlefish, sleeping turtles and Spanish dancers, among the best dives on the island.

Fly to Tenerife Norte or Gran Canaria and connect to El Hierro airport in about 30 minutes, or take the ferry from Los Cristianos on Tenerife, about two and a half hours. La Restinga is roughly 35 km and 50 minutes by road from the airport, and a rental car is the norm because public transport is thin. The road across the island climbs to about 1,500 m, so leave a safety margin after your last dive before crossing it, follow your computer's altitude guidance and the centre's advice, and sleep in La Restinga. The village has no hotels, only apartments, around 40 to 50 EUR a night for two, and they fill in high season.

Diving inside the reserve needs authorisation from MAPA or the Canary Islands government, and happens only at marked points from a support boat. A fully protected reserva integral off Bahía de Naos, between Roque de Naos and La Herradura beach and marked by plastic buoys, is closed to diving; scuba is allowed only outside it. Centres describe a limit of 12 divers per buoy, guides included, and groups of four to eight are usual. A typical day is two morning dives from about 08:30, with afternoon and night dives on request. Not every centre can run El Bajón on a given day, so say you want it when you book and allow several days for a window.

Easy sites such as La Cueva del Diablo and El Rincón suit newer divers; El Bajón, El Veril and El Río call for advanced skills. October is the favourite month, and June to October is the main season. Days off pair well with the volcanology centre, the Charco Azul pools and the El Golfo valley.