The Nivelle river flows through the north of the commune flowing towards the west parallel to the D918 on its way to the Atlantic Ocean. Several tributaries rise in the south of the commune and flow north, gathering many more tributaries, into the Nivelle. These streams include the Aniberreko Erreka, the Galardiko Erreka, and the Arraioko Erreka. The Larrunko Erreka forms the south-western border of the commune as it flows north then west to join the Intsolako Erreka which continues north to join the Aniberreko Erreka.