A walker had to be rescued by fire crews after becoming stranded in waterlogged sand in Swanage.
The walker had to be pulled from the water-sodden beach by Dorset Fire and Rescue Service on Friday.
Purbeck District Council has criticised people for ignoring the warning signs on Swanage beach, Dorset, which is situated near recent landslips.
Parts of the cliff became unstable after heavy rain in December.
A council spokesman said: "Further wet weather in January made the situation worse, with significant landfalls to the north of Ocean Bay, particularly in the section between Burlington Chine and Sheps Hollow."
Charlotte Blackman, 22, from Heanor, Derbyshire, died on 24 July after the 160ft (49m) high cliff collapsed onto Hive Beach near Burton Bradstock.
Five people escaped unhurt after a landslide on 8 August between Charmouth and Golden Cap.