Basque Country

The Basque coast runs along the southern Bay of Biscay — the Cantabrian coast — from Bilbao east to the French border at Hendaye. This is Atlantic Spain: semidiurnal, macrotidal, mean spring range around 3.5 metres at San Sebastián. Tides here are not incidental; they reshape beaches hour by hour and define when you can fish, surf, or walk the lower rock platforms. San Sebastián (Donostia) is the anchor — a city that curves around La Concha Bay with a composure rare in resort towns. The island of Santa Clara sits in the centre of the bay; the beach width changes by close to 100 metres between high and low water, exposing or swallowing the sand in ways that alter the entire character of the place. Monte Urgull on the east headland and Monte Igueldo on the west frame La Concha like bookends. Zarautz, 20 kilometres west, has the longest beach on the Basque coast at 2.4 kilometres and one of the most consistent left-hand surf breaks in northern Spain. The beach is backed by the old town and the Txakoli wine terraces of Getariako Txakolina. At high water the sand all but disappears; at low water the full 2.4 × 50–80 metre strip is exposed and the break extends across the whole length. Mundaka, 45 kilometres west of Zarautz and inside the Urdaibai Biosphere Reserve, has a famous hollow left that breaks over a sandbar at the mouth of the estuary — it works only on a dropping tide with a good northwesterly swell. Bilbao sits 12 kilometres up the Nervión estuary; Getxo is the coastal suburb at the estuary mouth where the river meets the Bay of Biscay. The Guggenheim Museum is 3 kilometres from the estuary, a gravitational point that pulled international attention to the city when it opened in 1997. The tidal Nervión was the historic artery of Bilbao's industrial and maritime trade. Tide predictions for all Basque Country locations on this site come from Open-Meteo Marine (±45 min / ±0.2–0.3 m accuracy). For official predictions, consult Puertos del Estado at puertos.es — Spain's authoritative tide prediction service, with gauge data for Bilbao and Pasajes (San Sebastián).