Introduction
Marine reserves concentrate the best of snorkelling in Spain due to biodiversity, visibility and safety.
Beneath the surface, light filters over green meadows and silver schools of fish that flicker like mirrors under the sun.
By the end, you will know when to go, what to see and how to organise your trip with judgement.
Why marine reserves offer more life
In a marine reserve, fishing is limited and key habitats are protected. This leaves room for populations to recover and for large species to return.
Posidonia oceanica is a marine plant that forms meadows, oxygenates the water and creates refuge and food for fry and rockfish. Walls and natural reefs also concentrate life: the term reef refers to rocky or biogenic structures where invertebrates and fish aggregate.
To choose where to go snorkelling in Spain, look for protection seals. These usually translate into more close encounters and less human pressure, so it is advisable to book your trip in advance during high season and dive during hours with fewer people.
How we chose the 7 spots and how to read this list
The list prioritises areas with abundant life, clear waters and easy access, by boat or from the coast, and operators with regular departures.
Each spot provides location, best times, costs and permits, recommended level and safety tips. This way you can compare before booking and choose the one that fits your level.
With children, look for sheltered areas and entry from the beach. If you do freediving, check currents and tides before entering. For photography, choose calm hours and mixed backgrounds: early morning sun on the water surface provides the best definition.
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The 7 spots with the most life in Spain's marine reserves
These are places where it is advisable to check the best time, access and safety before getting into the water.
In each entry, pay attention to those three pieces of information: when to go, how to get there and what precautions to take. Before entering the water, confirm the sea state and current regulations at your destination.
Use a signalling buoy: it is your best ally to ensure vessels see you.
1. Tabarca (Alicante): posidonia meadows and shallow reefs near the island
You can get there by public boat (about 12–25 minutes from Santa Pola and approximately one hour from Alicante) or taxi-boat; confirm prices with the operator. "Snorkel Tabarca" is listed among the best snorkelling places in the Mediterranean due to its mix of meadows and rocky outcrops.
- Location: Tabarca island, facing Santa Pola (Alicante)
- Access: boats from Santa Pola, Alicante and Benidorm (summer)
- Permits/fees: no fee for snorkelling; anchoring regulated with buoys
- Best time: late spring to early autumn; mornings with calm seas
- Level: ideal for beginners and families; also attractive for macro
- Services: operators with daily departures in season; equipment hire at the port
What to see and short routes:
- Shallow passages and caves on the eastern side (always with very calm seas).
Safety and recommendations:
- Gentle currents, but a lot of boat traffic: always use a buoy.
- Avoid days with easterly winds and swell; enter and exit through signalled areas.
- Do not step on or pull up posidonia; it is protected as a priority habitat by the EU.
- Certified local operators offer guided trips with support vests for little ones.
2. Medas Islands (Girona): rocky walls and schools of fish in protected waters
The Medas Islands off l’Estartit are a laboratory of life thanks to decades of protection within the Parc Natural del Montgrí, Illes Medes i Baix Ter. You access them by boat from the port of l’Estartit on organised departures; snorkel tours usually cost 25–45 € p.p. including equipment, depending on duration; confirm conditions with the operator.
- Location: off l’Estartit (Costa Brava, Girona)
- Access: only with authorised vessels from l’Estartit
- Permits/fees: boat access is limited by quotas; the operator manages permits
- Best time: May–October; early hours of the day with calm seas
- Level: better with some experience due to the depth of the walls (although there are shallow areas)
- Services: operators with multiple daily departures depending on the season
What to see and short routes:
- Schools of white seabream, gilthead seabream and common seabream in posidonia clearings.
- Trusting groupers near rocks, a symbol of the reserve.
- Walls with sponges and algae; on the surface you will see the mosaic of lights over crevices.
Safety and recommendations:
- Follow the guide's instructions; touching and feeding are prohibited.
- Do not separate from the group or pass delimitation buoys.
- Wear a thin wetsuit in spring (18–20 °C) and a UV shirt in summer.
- Respect the total exclusion zones where only research is permitted.
3. Cabo de Palos – Islas Hormigas (Murcia): rocky channels and nearby pelagic life
Cabo de Palos and the Islas Hormigas Marine Reserve, next to La Manga, hold very productive rocky bottoms and sheltered bays for snorkelling. It is an intermediate–advanced level spot: currents can appear in the channels.
You reach the port of Cabo de Palos by road from Cartagena in 30–40 minutes. From there, snorkel boats depart towards sheltered points, for 25–40 € per person depending on duration and equipment. The operator takes care of the marine reserve permits, which has restricted zones.
The best time is summer and early autumn, although tides and winds can generate currents.
You will see barracudas and beautiful bream grazing the upper layers, tapestries of algae and sponges, gorgonians at greater depth (sometimes from the surface in very shallow and clear spots) and nudibranchs and blennies in the illuminated crevices. Average visibility is 10–20 m, so a polarised mask with anti-fog treatment is advisable.
Always follow the guide through the currents of channels and exposed points, use a buoy, do not move away from the sheltering rocky outcrops and do not exceed the limits of the integral zones, which are monitored.
4. Columbretes Islands (Castellón): submerged volcano in crystal clear waters
50–60 km from the coast of Castellón, the Columbretes volcanic archipelago has clear waters and visitor control. It is a destination for divers and photographers who are willing to book in advance.
You reach it via an authorised excursion, with 2–3 hours of sailing. Confirm the itinerary and the sea conditions before setting off. Anchoring is done at designated buoys and the regulations are strict.
Barracudas, salemas, bream, and juvenile groupers roam the walls, and the pebble beaches clearly transition into rocky areas and meadows.
The archipelago is very exposed: decide the most sheltered area with the skipper. The level is suitable for everyone if the sea is very calm, and it is ideal for photographers.
The best time is summer with high pressure and flat seas; avoid strong easterly winds. Do not touch or disturb substrates: there are endemics and fragile habitats. On land, eating and smoking are prohibited. It is not advisable for people with reduced mobility.
5. Menorca: Northern Marine Reserve and southern coves like Macarella
Menorca combines the Northern Marine Reserve, on the Tramuntana coast, with southern coves like Macarella and Macarelleta, outside the reserve. The calm waters do the rest: it is a comfortable destination for families and for those starting with snorkelling.
The reserve extends between es cap Gros, Illa des Porros, and punta des Morter, and protects posidonia seabeds on the northern coast. Inside there are three protection areas: an integral reserve from pla de Mar to cala Barril, where fishing and extraction are prohibited; a special protection zone in the Bay of Fornells, only for professional fishing; and a third zone with special fishing conditions.
You arrive by road from Ciutadella or Maó and, in summer, by shuttle buses to the coves with restricted parking. You can also go by boat and thus enter marine caves such as Cova d'es Cormarí.
The best time is from late spring to early autumn, in the mornings with light winds. Underwater you will see posidonia meadows with sea bream, gilipotes, and fingerlings in schools. In the north, Cala Pregonda stands out for its reddish sand, unique in Menorca.
Before setting off, check access closures and capacity limits in high season and respect the paths. Avoid trampling on the posidonia and use short fins if you do not master the technique.
There is snorkel equipment hire at the port and on the island itself during high season.
6. La Graciosa and Chinijo Archipelago (Lanzarote): Atlantic biodiversity and lava
The Chinijo Archipelago Marine Reserve surrounds La Graciosa and the islets north of Lanzarote, featuring lava beds, reefs, and tidal pools.
You arrive by ferry from Órzola to Caleta de Sebo in 25–30 minutes.
Local operators organise guided snorkel trips with a buoy and life jacket. Before setting off, read the wind report.
Under the water, you will see lava formations and reefs with black seabream, parrotfish, salemas, and barracuda. At low tide, the crystal-clear tidal pools fill with small blennies and crabs; on clear days, schools of goatfish and juvenile fish appear. Cold water upwellings from the African coast provide nutrients and explain the richness of marine life in the area.
The best time is from late spring to autumn, with more stable trade winds, and September–October is usually calmer. The average water temperature is 18.2–19.6 °C in spring and 19.1 °C in winter, so a wetsuit is advisable.
The level is intermediate if there is a swell and easy in sheltered coves.
Anchoring and fishing are strictly regulated. Within a one-mile radius centred on Roque del Este (integral reserve), diving and fishing are prohibited.
Do not take anything from the seabed, do not feed the fish, and do not leave rubbish or anchor with boats. Respect nesting birds and leave no trace on pristine beaches.
7. Mar de las Calmas / La Restinga (El Hierro): deep blue and big life
The Mar de las Calmas Marine Reserve, sheltered by La Restinga, holds some of the most powerful encounters in the Canarian Atlantic. Its waters are calm and warmer than those of the rest of the islands, because they are protected from the trade winds and the cold Canary Current.
You arrive by road from Valverde in 40–50 minutes. Boat trips lead to sheltered coves and reefs within the reserve, with operators providing guides, flotation equipment, and a daily weather report. Regulation is strict: there are no-go zones, quotas, and circuits, so respect the integral no-entry zones.
The level is intermediate–advanced, although there are very calm options near the harbour.
Schools of goatfish, juvenile fish, and salemas swim over the lava. Rays (chucho), turtles, and, occasionally, pelagic fish also appear near the surface. In total calm, reefs with shallow cavities provide good macro and backlighting.
There are local currents at the points and tidal changes: follow the guide and the buoy, and avoid days with a western swell. Wear a thin wetsuit almost all year round, with water between 18 and 24 °C.
Location map
The interactive map brings together the 7 snorkel points in marine reserves, with their departure ports and approximate distances to nearby cities. It helps you see at a glance which spot is closest to you and from where the boat departs.
The departures are distributed as follows: Santa Pola/Alicante for Tabarca, l'Estartit for Medas, Cabo de Palos–Cartagena, Castellón for Columbretes, Fornells/Ciutadella in Menorca, Órzola–La Graciosa in Lanzarote, and La Restinga in El Hierro. You can activate layers with GPS coordinates and references for road and pier access.
With the map, you can calculate real times, check tides and wind, and save your locations. Before setting off, confirm the local maritime report, boat schedules, and any seasonal limitations on official websites or at the tourist office.
How to choose well: safety, visibility, permits and operators
Before you get into the water, look at the currents, the wind exposure and where you would come out in case of a problem. In the Mediterranean, the levante wind cuts visibility and raises short waves; in the Canary Islands, the trade winds and the swell dictate the day's plan.
Ask if the area is signposted, if there is mobile coverage and if it has a lifeguard or a support boat. A buoyancy aid provides more comfort for little ones and beginners.
Visibility depends on the wind, the swell, sediments and plankton blooms. After several days of calm, the water clears, and after a storm, it is advisable to wait 24–48 h.
The water temperature changes according to the area and the season. In the Canary Islands, it is between 19.1 °C in winter and 24 °C at the end of summer. In the Mediterranean, in summer, there are 24-26 °C at the surface and 18-20 °C at depth; in spring, the water is around 18-20 °C.
Most reservations allow snorkelling in signposted areas without a fee, but there are integral no-entry areas and regulated anchoring on buoys. Hire an operator or guide if there are currents or complex access points, if you are looking for remote spots or environmental interpretation, or if you are going with children and want buoyancy support and group control.
Check the report on AEMET and Puertos del Estado and confirm locally on the morning of the activity. Consult the regulations at MITECO, natural parks and maritime captaincies, and carry a warm Plan B in case the wind changes.
Respect the local community: park where appropriate, avoid saturating small coves and listen to skippers and guides, who know the pulse of the sea.
Recommended equipment and good practices
A transparent silicone mask with a good fit and anti-fog applied before entering changes the morning. The rest of the equipment depends on how you swim and where you go in.
To start, short fins; if you master breath-holding, long ones. Carry a buoyancy aid or a towed buoy: it gives you visibility and allows you to rest on the surface. A UV shirt or a thin 2–3 mm wetsuit covers both thermal and solar protection, and booties prevent slipping on rocky entries. If you record, attach the action camera with a float to your wrist.
There are accessories that add safety and others that should be used sparingly. Thin gloves are only for protecting your hands on the rocks during entry and exit, never for touching fauna. In areas with boat traffic, a buoy with an alpha flag is essential. A compact torch for shallow crevices, used with discretion, also helps.
Inside the water, do not step on or disturb the posidonia: its rhizomes are fragile and prevent erosion. Do not chase animals or feed them; it alters their behaviour and can be sanctionable. Pick up micro-rubbish if you can, with a mesh net. If you go by boat, do not anchor in meadows: use buoys or clean sand. On land, park in designated areas and respect the paths so as not to erode the dunes.
Equipment lasts longer if you take care of it. Rinse everything with fresh water after each use and dry it in the shade. Store the mask protected to avoid scratches and change the straps if they are cracked. For photos, clean the dome and do not touch it with sand; shoot in soft backlight at sunrise to get silhouettes without disturbing.
Frequently asked questions
Do I need a permit to go snorkelling in a marine reserve?
Generally, you do not need a permit to go snorkelling from the coast in a marine reserve. Before entering the water, check the local regulations and signage: there are prohibited zones and quotas for vessels.
If you have doubts or want to move by boat, consult authorised operators to learn about the conditions of the reserve.
What is the difference between snorkelling and scuba diving?
Snorkelling is practised on the surface with a tube and without a tank. Scuba diving uses heavy equipment and requires certification.
To go snorkelling, it is enough to know how to swim safely and use flotation if necessary.
What is the best time for snorkelling in these reserves?
In the Mediterranean, the good window goes from May to October, and mornings are usually the calmest hours. In the Canary Islands, you can enter the water all year round, although it is advisable to choose days with less trade winds and without swell.
Check the weather report on the same day before heading out: the wind and swell change from one hour to the next and affect visibility.
How should I act if I get caught in a current?
The first thing is to stay calm and float instead of fighting against the current. Swim diagonally towards an area with less current, never against it.
Signal your position with your buoy so that you can be seen from the outside. If you are with a guide, wait for their instructions before moving.
Are jellyfish or certain fish dangerous?
In summer, there may be jellyfish in some coves. Wear a UV shirt and do not touch them, neither in nor out of the water.
Do not touch fish or invertebrates either: some have stinging spines and will defend themselves if you grab them. If something stings you, rinse the area with seawater and consult a healthcare professional.
Recommendations for families and beginners?
For your first snorkelling outings, choose sheltered coves with calm waters. Enter the water early in the morning, when there are fewer people and the sea is calmer.
Bring a life jacket or flotation buoy and short fins. Always stay close to the shore and within the marked zones.
Where can I find reliable operators?
Look for companies with active certifications and insurance. Before booking, check that they offer daily departures during the season and clear safety briefings.
You can consult options on Picuco to compare experiences and availability.
Can I bring my underwater camera?
Yes, you can bring your underwater camera when snorkelling. Carry it with a float and a wrist strap so you do not lose it or hit the bottom.
To get the photo, do not harass the wildlife and avoid direct flash in the animals' eyes.
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Conclusion
Marine reserves bring together the best of snorkelling in Spain: clear waters, healthy Posidonia, and confident fish thanks to protection.
Plan wisely: choose calm days, check the regulations, use a buoy, and respect the habitats. To finalise your plan, define your date, confirm the weather report 24 hours before, and prepare a sheltered Plan B.