Seaford is the quieter Sussex seaside town at the western end of the Seven Sisters country. It does not have Eastbourne's resort polish or Brighton's noise, and that is a large part of the appeal: a long shingle beach, a practical town centre, and chalk downland rising almost immediately to the east.
The great reason to come is the coast. From town you can walk up to Seaford Head for the classic view of the Seven Sisters, then continue to Cuckmere Haven where the river winds through the valley to the sea. It is one of the cleanest chalk-and-sea landscapes in southern England.
Seaford town itself is modest: a seafront promenade, a Martello tower museum, a few pubs and cafes, and enough railway convenience to make it an easy day trip. West of town, Tide Mills adds a stranger, ruined note between Seaford and Newhaven.
Use Seaford as a walking base rather than a bucket-and-spade resort. The beach is wide and open, but the real reward is to climb out of town, look back over the Channel, and then drop toward the Cuckmere valley.