Seignosse is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France. Seignosse is prized for surfing. With Biarritz …Seignosse is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France. Seignosse is prized for surfing. With Biarritz and Hossegor, Seignosse is one of the historic place of birth for surfing in France.