Kontxapuzón Navideño is a Christmas Day swim in the Bay of La Concha in San Sebastián, organized by C.D. Fortuna K.E. It begins at midday and is less a race in the usual sense than a cold-water holiday dip with a crowd, a festive mood, and a charity purpose.
Around 250 people from Gipuzkoa participate in the traditional swim. Each year raises money for an association or local cause, with past support going to the mental health association Agifes and funds also directed to the Food Bank of Gipuzkoa, including its work against food waste.