Beach visitors are being urged to steer clear of unstable North Coast sand cliffs of up to 18ft in height, scoured out by extreme weather events.
The Royal National Lifeboat Institution (RNLI) said winter storms have dramatically changed the profile of a number of beaches in the area, as it issued a public safety warning. Whiterocks, Portrush East and Portstewart beaches were significantly affected by coastal erosion, it said.
RNLI lifeguard manager Mike Grocott explained storms had "taken their toll" on the make-up of some of the beaches.
"Many people returning to these favourite spots may be surprised at how different everything looks," he said.
"This includes significant erosion of the sand dunes where gentle slopes have washed away, leaving sheer sand cliffs, some of which are up to 18ft high."