Slow Sea Days in Ibiza: 6 Boat Trips, Cave Cruises and Sunset Sails to Book This Week (May 11–17, 2026)

There's a quiet stretch in early May when the island shifts gear. The headline parties haven't quite hit full volume, the beaches are wide and unhurried, and the sea — pale jade in the morning, deep cobalt by late afternoon — is at its most generous. If there's a perfect week to swap the dance floor for a deck, this is it. The boats are running, the captains have time to talk, and you can step off in a cove that, by July, will be a slow-motion traffic jam of dinghies.

This week (May 11–17, 2026), the calendar leans hard towards the water. Boat trips along the west coast, ferries skipping across to Formentera, jet-ski runs out to Es Vedrà, and a brunch cruise that turns the morning into a long lunch. Here are six ways to spend a day on the Mediterranean before the high-summer crowds arrive — handpicked from what's actually bookable this week.

1. San Antonio to Es Vedrà — The Classic West-Coast Cruise

If you only do one boat trip on this trip, make it this one. Capitan Nemo's San Antonio to Es Vedrà cruise is the slow, four-hour traverse of the Ponent coastline that takes you past Cala Comte, Cala Bassa and the dramatic limestone cliffs around Cala d'Hort before drifting beneath Es Vedrà itself — the 400-metre rock that sailors have been telling stories about for centuries. You'll anchor for a swim, and yes, the water really is that colour.

Two versions are running this week: a daytime departure on Wednesday 13 May at 10:00 (€23–45), and a sunset version on Thursday 14 May at 17:00 — the same route, but with Es Vedrà silhouetted against the dropping sun. Same price. Most people who do both say the sunset trip is the one they remember.

2. Cave and Beach Hopping Along the Ponent Coast

The west coast of Ibiza is folded with sea caves — narrow openings in the limestone that, from the road, you'd never know existed. TAKE OFF's Cave and Beach Hopping Boat Tour is a three-hour run from Ibiza Town that threads between half a dozen of them, anchoring at the kind of micro-coves where the sandy bottom is visible from the deck.

It departs at 10:30 each morning, including Tuesday, Wednesday and Thursday this week, and costs €70–100 depending on group size. Bring a mask. The boat carries snorkelling gear, but the coves are calm enough this time of year that you can spend a happy half-hour just floating. Captains here are honest about which spots are best given the wind — listen to them.

3. Ibiza's Northface — A Different Coast Altogether

Most boat tours stick to the south and west, which means the north coast — wilder, more forested, with sheer cliffs dropping into deep blue water — stays surprisingly empty. Ulises Cat's Northface trip on Thursday 14 May changes that. It's a half-day expedition (€40–98 depending on cabin choice) along the stretch from Portinatx to Cala Sant Vicent, taking in Tagomago island and the strange, pine-clad headlands that locals call the wildest part of Ibiza.

This is the trip to choose if you've been before and want to see something new. The water on this side is cooler and clearer, and the cliffs are tall enough that the boat feels small. Stop for lunch on board, swim in caves that aren't on the day-tripper map, and be back by mid-afternoon.

4. Brunch on the Boat — Lazy Tuesday at Sea

Tuesday 13 May at 13:00, Ulises Cat runs its Brunch on the Boat trip out of Ibiza Town (€80). The premise is straightforward: brunch, but slowly, while anchored in a quiet cove. Expect a proper spread — eggs, fresh fruit, pastries, coffee, prosecco if you want it — eaten somewhere between Talamanca and the headland.

It's a four-hour escape, which sounds long until you're on it and realising you don't want to get off. Bookings include all food and drinks, so the only thing you need to bring is sun cream and the willingness to ignore your phone for half a day. For two travellers it works out as one of the better-value experiences on the water this week.

5. Ferry to Formentera — Ibiza's Smaller, Quieter Sister

For a complete change of scene, take the ferry. The Balearia Fast Ferry runs from Ibiza Port to Formentera in 30 minutes, with departures from 07:00 onwards every day this week. Tickets start at €25 round-trip in the morning windows and climb to around €50 for peak crossings, which is still less than most boat tours and gives you a whole island to play with.

Formentera in mid-May is the version of itself that long-time visitors remember: untouristed beaches, slow lunches at chiringuitos that have just reopened, and water so clear it looks computer-generated. Rent a bike or a scooter when you arrive, head straight for Ses Illetes or Playa de Llevant, and don't try to do too much. The trick to Formentera is doing very little.

Cheaper alternative: Ulises Cat's Figueretas departure at 09:45 (€19–38) is even better value if you're staying in Playa d'en Bossa or Figueretas — same crossing, no need to schlep into town.

6. Lady Virginia — Anchor in the Clearest Water You'll Find

The Lady Virginia Boat does a single thing very well: it leaves Ibiza Town at 13:00 each day, motors to the calmest, most turquoise coves on the south coast, and drops anchor. That's it. €30–80 depending on the package. There's a swim platform, snorkelling kit, drinks on board, and no agenda beyond floating.

It's the trip to book if you want the photographs without the production. The boat is small enough to feel personal — usually around a dozen guests — and the captain knows which coves the bigger catamarans haven't found yet. Best for couples, small groups of friends, or anyone who's seen enough of Ibiza Town and just wants to swim.

Practical notes for sea days this week

The mid-May water temperature in Ibiza is around 18–20°C — refreshing rather than warm, but absolutely swimmable once you're in. Pack a light wetsuit top if you feel the cold; otherwise a long swim and a sunny deck do the trick. Mornings start cool and breezy, so a jumper for the early departures is wise.

UV is already strong, even when there's a sea breeze fooling you. Reef-safe sun cream, a hat, sunglasses, and water — non-negotiable. Most boats provide drinks, but a refillable bottle saves plastic and is welcomed by every captain we've ever met.

Book ahead where you can. May is gentler than July, but the smaller boats — Lady Virginia, the Brunch Cruise, the Northface — do fill up by the weekend. Most operators take cancellations up to 24 hours before, so there's little risk in committing early.

Most of all: leave time to do nothing. The whole point of a sea day in Ibiza is that the schedule dissolves the moment the engine cuts. You drop anchor in a cove, the water goes still, and three hours later you'll have no idea where the morning went. In May, that's still a possibility. By August, it isn't. Go now.