Length: 13.8/17.8/22.4 km (8.6/11.1/13.9 miles) 2/10
To make a change from the soaked countryside, a walk along the sea front following the England Coast Path, from Littlehampton eastwards. Several possible stopping places depending how far you want to go, but after Worthing there is quite a long roadside section unless the tide is out. On the web page the walk is described east to west and the GPX goes that way too but as we are following the coast, there should be no difficulty finding the way.
Trains: 0946 from Victoria (Clapham Junction 0953, East Croydon 1004) arriving 1134. Direct trains back from Worthing 03/33, Lancing 07/37, Shoreham-by-Sea 12/42. More but slower trains back via Brighton. A return to Littlehampton will cover all journeys, but it's quite pricey so it might be worth getting advance tickets each way.
Lunch: beachside cafes or go inland for a pub:
Blue Bird Cafe, Ferring, BN12 5QX; Sea Lane Cafe, Goring BN12 4HR; , The Mulberry pub Goring (01903-241555), 10 minute walk directly inland along Sea Lane from the Sea Lane Cafe.
Tea: In Worthing, some cafes near the pier and plenty of places in town if heading for the station. The Railway Hotel by the station is in the Good Beer Guide. In Lancing, Perch on the Beach, open till 4. In Shoreham, a range of cafes and pubs, including the interesting Old Star micropub.
Shortening the walk : The railway line from Littlehampton runs all the way along the route, albeit quite a bit inland, and there are four stations before Worthing. For instance, we reach Goring-by-Sea after about 6 miles but it's another mile from the shore to the station.
L=swc.211 but note we are doing this in reverse.