The town is not big enough to warrant taking a bus around. Car parking is available at the Fort and Paradise Park. Both of these places are within walking distance from the station and ferry port.
There are probably coastal walks towards Brighton, but a better bet would be to go the other direction from Seaford towards Cuckhaven and on over the Seven Sisters towards Beachy Head.
Catch A Ferry most travellers will use Newhaven as a stopping point en route to France (and beyond); services to Dieppe
Newhaven Fort A fort in operation since Napoleonic times, it ceased operation after WW2 and has been converted into a fascinating museum. the view over the channel is also well worth a visit. Prices are as follows:
Adults £5.75
Senior/Concession £4.65
Child £3.70
Family Tickets (2 Adults + 2/3 Children) £16.50
Season/Yearly Tickets:
Adults £16.50, Senior/ Unwaged/student £13.00,
Child £11.00, Family £45.00
Visitors must note that there is a height bar to the car park; however alternative car parking is available.
Tide Mills Not a great tourist attraction, part of the old course of the Ouse River; before it broke through and 'New - Haven' was created. There are various specialist plants. Possible to walk to the nearby town of Seaford, very pleasant on a sunny day
Paradise Park Originally a garden centre but has had bits added to it, now includes a model railway, dinosaur museum, a mini arcade and Newhaven Museum. it in the north of Newhaven, on 'Avis Road'. Open Sundays
Various other establishments; The Hope serves good food; it is underneath the fort; upstairs has a view over the harbour. For the desperate / insane there is a McDonalds opposite the Focus retail park
Brighton to the West is a simple bus (£2.50 taking about an hour) or train (£3.60 return taking about half an hour) by car it is easily accessible along the coast road
Take a walk on the beach towards Seaford, passing the old Dieppe Seaplane station, tidemills water mill (disused) and the old railway to Seaford (it was moved in the late 1800s)