Do you need a jet ski licence to drive one in spain?

Yes, in Spain, you need a license to operate a jet ski. Specifically, you must have a "Licencia de Navegación" (Navigation License) or a higher category, such as the "Patrón de Navegación Básica" (Basic Navigation Skipper) or "Patrón de Yate" (Yacht Skipper). Additionally, there are age restrictions, typically requiring operators to be at least 18 years old. Always check local regulations, as they can vary by region.