There are several factors which affect coastal erosion, which can be marine or land based:
Waves
Beaches
Rock Type
Subaerial Processes
Rock Type
Subaerial Processes: Weathering and mass movement processes such as landslides weaken cliffs. Rock fragments as a result of these processes may lead to increased corrasion and abrasion
Waves: This is the main factor affecting the rate and type of erosion . As a result, most erosion occurs during the winter months when waves are more likely to be destructive and more powerful due to frequent storms