La Concha, the city beach that changes size with the tide, and how to do it right

Overview

La Concha is not a beach you travel out to: it is the front of the city, a shell-shaped curve of sand between the old town under Urgull and the rocky point of the Pico del Loro, with the promenade and its white railing running along the top for its whole length. Its Basque name, Kontxa, is the same word in Basque spelling. What makes it worth a page of its own is that it is never the same size twice in a day. The beach is about 1,350 meters long but on average only around 40 meters wide, and the Atlantic tide here moves several meters vertically, so at high water the sand can shrink to a strip under the sea wall and at low water it opens into a broad, firm expanse you can walk end to end. The city’s official tourism site publishes the day’s two high and two low tides, and that table, rather than the weather, is the thing to check before you plan a long walk or an afternoon on the sand.

The sand and the water

The sand is fine and pale gold, and at low tide the lower part of the beach is packed hard by the receding water, which is what makes the length of it walkable barefoot. The bay is almost closed: Urgull on one side, Igueldo on the other and the island of Santa Clara in the mouth break the open sea, so the water inside is usually calm, with small waves, a gentle sandy entry and a gradual shelf. That makes it a straightforward beach for children and for swimmers who want to swim lengths parallel to the shore rather than fight surf. It is not a snorkelling beach, and it is not a surf beach either: the waves the Basque coast is known for break elsewhere, on the open shore east of the river.

At the big spring tides of autumn, the water draws back far enough that people have walked out across the exposed sand towards Santa Clara. Treat that as something the tide occasionally allows, not a route: the water comes back across flat ground faster than it seems to.

What the tide no longer allows is the old low-water crossing to Ondarreta, the next beach west. The passage over the rocks of the Pico del Loro, which used to join the two at low tide, was closed in March 2026, when the municipal police taped off the accesses to the Pico del Loro from both beaches after falls on its slippery rock. To reach Ondarreta now, go up to the promenade and walk round.

Local tip: check the tide table before choosing a time. Low water gives you the long walk and room to spread out on a summer afternoon; high water leaves a crowded ribbon of sand and is the moment to swim from the steps instead of searching for space.

Getting there

From anywhere central there is nothing to arrange: walk. The beach runs along the edge of the Centro, a few minutes from the Parte Vieja, and the promenade above it is the route the city guide already recommends for getting between neighborhoods on foot. Stairs and ramps lead down from the promenade to the sand at intervals along its length, so you choose your stretch by where you join it. If you are staying further out, the city buses that run along the bay bring you close to the promenade, and the seafront bike lane follows it. There is no reason to drive: the advice against bringing a car into the center applies here more than anywhere.

Practicalities

Access is free and unticketed. Bring a towel, water and sun cover; changing and shower facilities exist under the promenade, but plan around what you carry rather than what you hope to rent. In the summer bathing season the beach has lifeguard cover, and the calm of the bay is real, but the usual sea rules still apply at the far ends near the rocks and on a falling spring tide.

July and August are crowded, and on a hot weekend at high tide there is genuinely little sand left per person; September keeps midsummer’s water temperature with more room; June is quieter too, but the sea is a couple of degrees cooler. Out of season the beach is a walk rather than a swim, and arguably at its best: the broad low-tide sand, the island in the mouth of the bay and the light over Igueldo in the late afternoon, with the promenade above for when the tide comes in. Time it by the table first and the clock second, and the beach gives you its full width.