Mallorca is Europe's archetypal holiday island, and its diving is typical western-Mediterranean fare — rocky drop-offs, Posidonia meadows and no coral reefs — lifted well above ordinary by two genuine assets: the El Toro and Malgrats marine reserves off the southwest, where dusky grouper biomass has rebounded up to 52-fold since protection in 2004, and the light-filled limestone caverns around Cala Ratjada inside the 11,000-hectare Llevant marine reserve.
Destination info
Conditions, highlights, and the resident marine life.
Conditions
Water and air temperature across the year.
WaterAirDryShoulderWet
Description
Mallorca is the largest of the Balearic Islands and sits at the centre of one of Europe's biggest mass-tourism economies — the archipelago drew 18.7 million visitors in 2024 — so expect busy resorts, not wilderness. The diving itself is honest western-Mediterranean: limestone boulder slopes, caverns and Posidonia oceanica seagrass meadows rather than coral reefs, with modest fish life along most of the coast and visibility that routinely hits 20–30 m. Two clusters make it worth a diver's attention. Off the southwest, the small El Toro and Malgrats Islands marine reserves (created in 2004, later unified and extended to 2,952 hectares) are a textbook protection rebound — by 2020 dusky grouper biomass at El Toro was up to 52 times its 2004 level and brown meagre 284 times, the highest vulnerable-fish biomass recorded on the Balearic coast — and five-to-ten-minute boat rides out of Santa Ponsa reliably deliver close grouper encounters, schooling barracuda and summer amberjack. On the island's opposite corner, Cala Ratjada lies inside the 11,000-hectare Llevant marine reserve (declared 2007), where the draw is geology as much as fish: a network of caverns and caves discovered and named by local diver Jaume Ferriol — most famously the Cathedral, with its air-chamber grotto — plus the cave-riddled rock of Cap des Freu, whose underwater cavities Spain's marine-reserve service describes as unique in the archipelago. Reserve diving is regulated (the Llevant reserve caps scuba at 200 immersions per day across eight zones and closes to diving November–February), so book through licensed local centres. The industry is summer-seasonal: the main season runs roughly mid-June to October with in-season water of 22–28°C, while from December to April the sea drops to around 14°C and many centres shut. In this catalogue's season keys, "dry" marks the warm peak diving months, "shoulder" the cooler fringes, and "wet" the winter off-season.
Highlights
What makes this dive worth the trip.
The El Toro and Malgrats Islands marine reserves, created by the Balearic government in 2004 minutes from Santa Ponsa, are among the Mediterranean's clearest small-reserve success stories: by 2020 dusky grouper biomass at El Toro had risen up to 52 times its 2004 level and brown meagre 284 times — the highest vulnerable-species fish biomass ever recorded on the Balearic coast — and the unification decree added dedicated diving zones to each reserve.
Following a push approved by the Calvià town council in September 2020, the two southwest reserves were unified and the protected area multiplied by 13 — from the original 227 hectares to 2,952 hectares stretching from Punta Castellot to Cala Figuera — to protect Posidonia meadows and coral-like benthic habitats alongside the recovering fish stocks.
The Llevant de Mallorca–Cala Rajada marine reserve, declared in 2007 (Order APA/961/2007), covers 11,000 hectares (5,900 ha regional waters, 5,100 ha state waters) and strictly regulates scuba: a maximum of 200 immersions per day across eight designated zones, an annual cap of 11,500 dives, a low season in March–April and a full closure to diving from November to February — its submarine caves at Cap des Freu are described as unique in the archipelago.
Marine life
19 species you’re likely to encounter on a dive here.
Dive sites
6 signature sites at this destination.
Little Cheese
The smaller sibling of Big Cheese and the area's easy option: a maximum of 16 m, with the same pattern of passages and holes on a friendlier scale, surrounded by sand patches and Posidonia seagrass inside the Llevant reserve. Reachable by boat or from land, which makes it the bad-weather fallback and a natural training and check-dive site. Groupers, morays, barracuda and rays pass through, and slipper lobsters tuck into the crevices seasonally.
6–16 mbeginnerShoreNo currentVisibility 10–25 m
El Toro (Illa del Toro)
A small islet off Calvià's Cap de Cala Figuera and the most-dived spot in the southwest reserves — regularly cited as the fishiest dive site on the island. A 5 m platform rings the rock (handy for training and safety stops), a slope leads to 15–20 m where dusky groupers, morays and octopus hold territory, and deeper sections at 35–40 m produce John Dory and conger. The grouper population here is the reserve's headline act: decades of protection have made large, confident animals the norm rather than the exception.
5–40 mintermediateDay boatLightVisibility 15–35 m
Malgrats Islands
Two protected islets off Santa Ponsa, a 5–10 minute boat ride from the harbour, with three distinct dive areas: the Piscina, a 3 m natural pool used for training; gentle boulder reefs at mid-depth; and Punta Malgrats, a drop-off reaching 35 m for experienced divers. The reserve (no fishing May–October, heavily restricted otherwise) is best known for its big schools of barracuda, plus groupers, scorpionfish and morays in numbers that noticeably exceed the unprotected coast nearby.
3–35 mintermediateDay boatLightVisibility 15–30 m
The Cathedral
Cala Ratjada's signature dive and the site that made the town's name in cave diving: a cavern system with a huge entrance whose daylight zone can be dived on standard recreational equipment, leading to branching passages, thermoclines and an underground air-chamber grotto where divers can surface inside the rock. Discovered and named by Jaume Ferriol of Mero Diving. The entrance area sits around 15 m; anything beyond the light zone is genuine overhead territory needing competent guiding, good buoyancy and ideally cave training.
12–20 madvancedDay boatNo currentVisibility 15–30 m
Cap des Freu
The cave-riddled headland at the island's northeast tip and the deepest dive in the Cala Ratjada repertoire, dropping to around 40 m through a mighty boulder landscape with a swim-through tunnel and a cavern that can be surfaced in. Spain's marine-reserve service singles out the submarine caves of this cape as unique in the Balearic archipelago. Barracuda, groupers, morays, triggerfish, flying gurnards and dorid nudibranchs are the regulars; it is the most exposed and weather-dependent site in the area.
12–40 madvancedDay boatModerateVisibility 20–30 m
Big Cheese
An imposing rock rising from the sea near Cala Ratjada, named for the Swiss-cheese pattern of holes, wide openings and light-flooded cavities that riddle it between roughly 12 and 27 m. The passages are wide and bright enough for non-cave divers, and the open water around the rock turns on when hunting barracuda push sardine shoals against it. Octopus, morays and nudibranchs fill the holes; slight currents are common but manageable.
12–27 mintermediateDay boatLightVisibility 15–30 m
Where to dive & stay
Local dive centers, resorts, and hotels.
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