Diving in El Hierro

Reaching the island takes most of a day: flight to Tenerife, inter-island connection or ferry, then 50 minutes of winding road to La Restinga. Divers who come for El Bajon, the night dive at the harbour and the chance of a sand tiger shark encounter consistently say yes. Divers who expect Maldives-grade species density are often disappointed, especially outside October. The standard community advice is to pair El Hierro with Tenerife rather than treat it as a standalone week.

October draws the strongest praise in both Spanish and English forum reports: warm water, calm seas and clear visibility. June to October is the window for the smalltooth sand tiger shark aggregation at Baja Rosario, though the species was absent 2019-2025 before sightings resumed in August 2025. Winter (December to March) sees colder water, variable swell and reduced flight and ferry connections.

Several sites suit Open Water level. Cueva del Diablo sits at 5-15 m with no current; El Rincon runs along a sheltered breakwater reef at 0-20 m; Baja Rosario tops out at 25 m. The Mar de las Calmas is sheltered from trade winds, so surface conditions inside the reserve are usually calm. El Bajon, El Veril and the east-coast sites need more experience.

Fly from Tenerife Norte (TFN) or Gran Canaria (LPA) to El Hierro airport (VDE) with Binter or CanaryFly in about 30 minutes, typically around 30 EUR. Or take the ferry from Los Cristianos to Valverde, roughly 2 hours 20 minutes, one daily departure except Saturdays. La Restinga is 50 minutes by car from the airport. Rent a car; public transport barely exists.

El Bajon is a twin-peaked underwater volcano rising from a sandy base at about 100 m to summits at 6-9 m below the surface, with vertical walls and overhangs on both sides. Currents concentrate amberjack, grouper, barracuda and seasonal devil rays. Reserve rules cap each buoy at 12 divers and one vessel, and the site is exposed enough that strong swell, wind or current can lock it out. A week on the island often yields only two or three Bajon windows.

The summit sits at about 89 m below the surface, well beyond recreational limits. The eruption lasted roughly six months (October 2011 to March 2012) and forced the evacuation of La Restinga. The volcano itself is unreachable, but local operators report that the marine life above it has recovered and, in many accounts, multiplied since the event.

La Restinga, where every dive centre is based. Accommodation is apartments rather than hotels, typically 40-50 EUR per night for two. High season fills fast and many visitors book through their dive centre. Staying elsewhere on the island creates a DCS risk: the main road climbs to 1,200-1,500 m to cross the ridge, and forum consensus is firm that divers should not drive that road with any residual nitrogen load.

Lanzarote and Tenerife win on variety, year-round infrastructure and reliable shallow species such as angel sharks and turtles. El Hierro wins on topography, visibility and the big-animal possibilities at El Bajon and Baja Rosario. Spanish community voices often rank El Hierro below Cabo de Palos, Tenerife South or El Cabron for marine life density, while English-language reports describe larger fish and more dramatic relief. Pairing El Hierro with Tenerife is the pragmatic approach.

The tiburon solrayo is the smalltooth sand tiger shark (Odontaspis ferox), a deep-water species that ascended from 300-1000 m to shallow water at Baja Rosario historically between June and October. Pregnant females over 3 m long are the reproductive aggregation, thought to occur roughly every two years. The species was absent 2019-2025; sightings resumed in August 2025. Encounters are never guaranteed and a 2 m minimum distance, no-chase rule applies.

Community opinion is split. El Bajon and the night dive at La Restinga harbour draw consistent praise; several experienced divers report that other reserve sites feel repetitive if the Alisios lock out the east coast. October visitors describe spectacular conditions; winter visitors are more likely to come away disappointed. Plan for at least 5 days, time the visit for autumn if possible and treat the east-coast window as a bonus rather than a guarantee.