All the materials transported by waves, tides and currents have to be deposited somewhere. Deposition takes place under the following conditions:
1 sheltered location: this is where the coast is sheltered from prevailing winds such that wave erosion in minimal. They are favourable for sites for the formation of beaches.

2 gentle coastal slope: this area benefits from the deposition materials brought up by constructive waves where the swash is more powerful than the backwash.
3 excessive load: during a storm, large amounts of material are eroded from the coast. When the storm subsides, it leaves behind a lot of deposits, which the retreating waves are unable to carry back to the sea.

4 shallow coastal water: where coastal water is shallow, the advancing waves break off as gentle spilling breakers, leaving behind more eroded material on the shore than can be carried back to he sea.

5 an abrupt in shoreline direction: when the coastal line takes a sharp turn from its normal direction, the water along the coast slackens, dropping all the eroded material it carries.
6 a change in the level of the coast: earth movement may uplift a coastal region or the sea level may subside, leaving eroded materials stranded on the new emergent coast.