The motion of particles in a surface wave is a combination of transverse and longitudinal waves.
The motion of particles in a surface wave is a combination of transverse and longitudinal waves. Transverse waves are waves in which the disturbance is perpendicular to the direction of propagation, while longitudinal waves are waves in which the disturbance is parallel to the direction of propagation. In surface waves, the particles of the medium move both up and down (transverse) and back and forth (longitudinal), resulting in a combination of these two types of waves.