Adequate, without being fully connected. Trains run to Brighton via Lewes at about two an hour, from Seaford Rail Station at the end of the branch line. About three residents in a hundred actually commute that way. Gigabit-speed broadband reaches roughly eighty-four percent of premises. For most people moving here, the honest question is not whether Seaford connects to the country, but whether their job needs it to.
The rail line runs from Seaford Rail Station through Bishopstone Rail Station, Southease Rail Station, Newhaven Town Rail Station and Newhaven Harbour Rail Station, with services to Brighton via Lewes at roughly two trains an hour. Two an hour is a decent frequency for a branch line, but the direction of travel is fixed. Seaford is the terminus, and the line does not run direct to London. Getting to a London terminal from here means a change at Lewes or Brighton and an acceptance of the total journey time. Roughly three residents in a hundred make that trip regularly enough to count as a train commute, which tells you how much of the town has arranged its working life around the line. On buses, there are 113 stops within the town, which is a generous count for a coastal population of 24,000 and reflects the routes running west along the coast road to Brighton and east to Eastbourne. About four in a hundred residents use the bus to get to work. Most drive, or work from home, or both.
Broadband is the strongest link in Seaford's connectivity picture. Gigabit-speed fibre gets to about eighty-four percent of addresses, and nearly every remaining address sits on at least fast broadband. That is what has quietly changed the town in the last five years: the rail line does not need to work for your commute if the fibre does. The share of residents working from home sits at just over three in ten, which is high for a coastal town and modest for a town of software engineers. Seaford sits somewhere between the two profiles.
On practical getting about, roughly half of Seaford's working residents drive to work. A typical trip into the town centre by car averages about nine minutes from a postcode inside the town. By public transport it averages fourteen minutes, and on foot about twenty. For anything further, the coast road going west takes you to Brighton, the same road going east takes you to Eastbourne, and one of those directions becomes the daily reality for anyone whose job is not remote or already in the town. Two public electric-vehicle chargepoints sit inside the town's bounding box, one of them a rapid charger. That is the current provision for the switch to electric, and it is thin.
Above average by inland-rural standards, below average by south-coast-city standards. If you have a car, a home broadband contract, and a job that lets you use the second more than the first, Seaford is well enough connected for the life you can actually build here.