While a lot of Camber Sand's attractions are outdoors, you shouldn't let a rainy day put a damper on your holiday.
You're going to be getting wet anyway, so why not try out some watersports activities? Camber's coast is famous for kitesurfing, with The Kitesurf Centre offering lessons and equipment hire locally. For an adrenaline-packed day out, nearby Action Watersports offers a range of water-based activities on their own private lake, including waterskiiing, paddleboarding and an inflatable aqua park obstacle course.
If you prefer to stay on dry land, why not use a rainy day as an excuse to go shopping and have lunch out in Rye. This historic town is full of independent shops and boutiques.