Ibiza has two coastlines. There's the one you drive to — the car park, the wooden steps, the towel wedged between two other towels — and there's the one that only opens up when you're floating three hundred metres offshore, engine off, looking back at a cliff that has no road behind it. Spending a day on the water is the single best way to see Ibiza by boat, and it's far less exclusive than the yacht photos suggest. This is a local's guide to the bays worth aiming for, what a boat actually costs, and the anchoring rules that catch out more visitors every summer.
Why the island looks completely different from the water
Ibiza is small — about 45 kilometres end to end — but the coast is folded into something like 210 kilometres of cliffs, coves and headlands. Roughly a third of it has no road access at all. From a boat you get the parts of the island the guidebooks skip: the sandstone quarry at Sa Pedrera de Cala d'Hort, cut into geometric blocks by nineteenth-century masons and now half-swallowed by the sea; the caves under Punta Galera; the north coast between Cala d'en Serra and Portinatx, where the cliffs go copper at six in the evening.
There's also the simple matter of water quality. The clearest swimming in Ibiza is almost never at the busiest beach. It's forty metres off the busiest beach, over sand, where nobody is kicking up silt. On a calm morning in the south you can anchor in eight metres and count the ripples on the seabed.
The bays worth pointing the bow at
Es Portitxol (north-west, near Sant Miquel) is the postcard: a horseshoe of grey pebbles, a cluster of old fishermen's boat houses with wooden slipways, no bar, no music. It's a punishing walk down from the road, which is precisely why it stays quiet. Arriving by sea feels like cheating.
Cala Salada and Cala Saladeta sit side by side on the west coast. Saladeta has no road, only a scramble over rocks, and the water is a shade of green that doesn't quite look real. Anchor outside the swim zone and swim in.
Cala d'Hort and Es Vedrà are the classic southwest run. The 400-metre limestone rock rises straight out of the sea and, up close, is genuinely imposing rather than merely photogenic. Circling it is one of the great half-hours in the Mediterranean. Es Vedrà is a strict nature reserve — landing is not permitted, and the seabird colonies are the reason.
Cala Benirràs on the north coast is worth a Sunday afternoon, when the drummers gather on the sand for the sunset. From the water you get the whole amphitheatre, and you avoid the traffic jam on the access road.
Cala Llentia, Cala Codolar and Cala Conta form a good south-westerly chain if the wind is coming from the north. Between Conta and the islets of S'Espartar and Ses Bledes the water shallows out over pale sand, and the colour goes almost Caribbean.
Cala Mastella and Pou des Lleó on the quieter east coast are the sensible choice when the west is blowing. Small, sheltered, low-key, with the sort of fishing shacks that make you want to buy one.
Formentera in a day, the easy version
You don't need a private boat for the best sea day on offer. The passenger ferry from Ibiza Town's Estación Marítima to La Savina takes around half an hour on the fast services, and several operators run through the day from early morning until evening. Return fares typically land somewhere in the €40–60 range per adult in high season, and it's worth booking online in advance in August — both for the price and because the middle-of-the-day sailings fill up.
Once you're there, rent a bike or a scooter at the port and head for Ses Illetes or Cala Saona. Two things to know: Formentera charges a vehicle entry and circulation fee for cars and motorbikes brought over in summer, so travelling as a foot passenger and renting on arrival is usually cheaper and always easier. And the last ferry back is earlier than you think — check the time before you order a second bottle of anything.
Between the two islands sits Espalmador, a low sandy island with a famous mud lagoon. It's privately owned and protected; access rules are tightly controlled and the lagoon itself is off limits. Don't plan your day around it.
Renting a boat: the honest maths
There are three realistic routes onto the water.
Shared group trips are the cheapest way in. Half-day and full-day boat excursions from Sant Antoni, Ibiza Town, Santa Eulària and Cala d'Hort generally run somewhere between €50 and €100 per person depending on the boat, the length of the trip and whether food and drinks are included. Sunset sails around Es Vedrà are the most popular, and in July and August they sell out days ahead.
Renting a small boat without a licence is the option most people don't realise exists. Under Spanish rules you can operate a boat under five metres with an engine of 15 horsepower or less without any qualification. That gets you a little open dinghy — perfect for hopping between two or three nearby coves at low speed, useless for crossing to Formentera. Expect roughly €150–300 for a day depending on season and operator, plus fuel and a deposit.
Skippered charters cover everything from a traditional wooden llaüt for six people to a flybridge motor yacht. A modest skippered day boat often starts around €400–700 in shoulder season and climbs steeply through July and August; larger yachts run into the thousands. Split between six or eight people it's less absurd than it sounds — and a skipper who knows the island will find you an empty cove while everyone else queues at the obvious one.
Posidonia: the rule that actually matters
Under the water around Ibiza and Formentera grows Posidonia oceanica, a seagrass meadow that is the reason the sea here is so clear. One clone of it near Formentera is estimated to be around 100,000 years old, and the meadows are part of the UNESCO World Heritage listing the islands hold.
Dropping an anchor into posidonia rips it out, and it grows back at roughly a centimetre a year. The Balearic government's posidonia decree bans anchoring over the seagrass, with inspection boats patrolling in summer and fines that run into serious money. The practical answer is easy: anchor on sand, never on the dark patches. Sand reads as bright turquoise from the surface; posidonia reads as dark green or black. If you can't tell, the Balearic government publishes a free official map showing where anchoring is permitted, and any legitimate charter company will brief you on it.
The same logic applies to the swim buoy lines — the yellow markers off busy beaches are a boundary, not a suggestion.
Small things that make the day work
Go early. The sea is glassiest between about eight and eleven in the morning, and the afternoon breeze builds most days in summer. Check the wind direction before you choose a coast: north wind means head south and east, south wind means head north and west. Take twice the water you think you need and a proper hat — there is no shade at anchor, and people badly underestimate the sun reflecting off the water. Bring cash for the smaller beach kiosks. And if you're bringing food out, bring the rubbish back; the coves with no road are also the coves with no bins.
Sea days are the one thing on this island that reliably lives up to the photographs. Pick a bay, watch the wind, and let the rest of the day happen on its own.
Planning your week? Browse everything happening across the island on the Ibiza Calendar — markets, live music, village fiestas and more, updated daily.
