Straight answer first: the best snorkelling spots in Ibiza by boat are exactly the ones you cannot reach from a beach towel. By late morning a busy beach has churned its own shallows into a sandy haze, while the water people actually photograph lies out at the anchorages — the protected islets around Es Vedrà, the rock channels off Cala Comte, the sand flats of S'Espalmador and Tagomago's sheltered side just up the coast from us. Every one of them sits on a route we run from Marina Santa Eulalia, snorkelling gear is already on board, and our skipper's favourite part of the job is dropping the hook over the clearest patch he can find that day.
Why the clearest water is always at anchor
Two things decide what you see underwater around Ibiza: seagrass and feet. Posidonia — the seagrass meadow that carpets the seabed between Ibiza and Formentera and forms part of a UNESCO World Heritage listing — works like a living filter, holding the sand in place and leaving the water above it glassy. Feet do the opposite. Anywhere shallow enough to wade into gets stirred into soup by noon.
From the boat, none of that applies. You step down the stern ladder into water nobody has touched all morning. The first thing you hear is your own breathing through the snorkel; hang still for a moment and the second is a faint crackle from below — the reef quietly going about its business.
The best snorkelling spots in Ibiza by boat, route by route
Es Vedrà and Cala d'Hort — the west-coast reserve
The islets around Es Vedrà are a protected nature reserve, and you feel it the moment the mask goes in. The rock does not stop at the waterline: it keeps falling away beneath you in ledges where schools of barracuda hang mid-water like rows of silver commas, entirely unbothered by company. We anchor at Cala d'Hort with the rock filling the horizon; snorkel out along the edge of the posidonia meadow and watch salema graze across it in slow, flickering herds.
The rock islets off Cala Comte and Cala Bassa
These two coves hold the clearest turquoise water we know on the island. The islets scattered offshore create shallow channels of white sand and rock — exactly the mix snorkellers want. Damselfish hover in the open, ornate wrasse patrol the rubble, and if you are patient with the crevices you will eventually meet an octopus doing its best impression of a stone. Because you arrive by water, you snorkel the outside of the islets, the side the beach crowds never reach.
S'Espalmador and the Formentera shallows
On the Formentera day, our first swim stop is S'Espalmador — an uninhabited islet with water so shallow and bright that your own shadow follows you across the ribbed sand. This is not fish-counting snorkelling; here the water itself is the event, a pale, luminous blue you otherwise associate with the Caribbean. Drift towards the seagrass edge and the life appears: bream over the boundary, silver flashes where sand meets meadow. It is also the gentlest snorkel of any route — children can stand up whenever they like.
Tagomago and the east-coast lee
Our home-water card. Tagomago lies about 20 minutes from our berth, and its landward side sits in the lee when the sea breeze builds — calm, clear water along rocky edges while the west coast is flecked with whitecaps. On windy days our skipper heads for the quieter east coast instead of fighting the swell, and the snorkelling under those unhurried cliffs surprises everyone who assumed the famous names were the whole story.
Gear: what is on board, what to bring
Snorkelling gear is waiting on board, so you do not need to pack a thing to get underwater. A few notes from experience:
- Bring: your own mask if you wear a prescription one, and a lycra top if you burn easily — floating face-down, your shoulders and the backs of your legs take full sun.
- Already on board: snorkelling gear, shade under the T-top and the shade sails between swims, and a proper boarding ladder at the stern, so getting out is as easy as getting in.
- Experience needed: none. The skipper briefs first-timers and children before anyone gets wet, and keeps watch while you swim.
When the SUP or Seabob actually earns its keep
Honest advice, because these are paid extras. For one cove and a relaxed hour in the water, the gear on board is all you need — save your money. The inflatable SUP (€50) earns its place on cliff-line days: paddle along the rock at Cala d'Hort or the east coast and peer down into water that would take you twenty minutes to cover swimming. The Seabob (€250, briefing included) is the one that changes the game — it pulls you across more reef in ten minutes than fins manage in an hour, and gliding along the Es Vedrà ledges with it is the most repeated request we get from returning guests. On a lazy S'Espalmador day, skip both.
Make the morning count
The sea is at its glassiest before the afternoon breeze wakes up. Tell us snorkelling is your priority when you book and we will run the day in the right order: the far spots in the morning calm, the easy shallows after lunch. A full day of 8 hours, typically 10:00 to 18:00, fits two or three completely different underwater worlds without ever feeling rushed. The skipper reads the wind and picks the clear side on the day — your only job is deciding which cove gets your first mask-rinse.
