The boy was part of a group from Uxbridge College in west London, who were visiting the beachside village of West Wittering, near Chichester, West Sussex, to celebrate the end of term, according to Sky NEWS.
He was airlifted to hospital where he was pronounced dead, and his family have been informed, Sussex Police said.
Uxbridge College principal Dylan McTaggart said: “This was a tragic accident that has had a huge impact on everyone here. Our priority now is to look after all those affected.
