From MarineSpecies Traits Wiki
The longshore current is the dominating current in the nearshore zone, it is running parallel to the shore. The longshore current is generated by the shore-parallel component of the stresses associated with the breaking process for obliquely incoming waves, the so-called radiation stresses, and by the surplus water which is carried across the breaker zone towards the coastline.
For more coastal definitions and a sketch, see also Definitions of coastal terms.
- Mangor, Karsten. 2004. “Shoreline Management Guidelines”. DHI Water and Environment, 294pp.