Plymouth City Council said Mount Batten beach had been closed for the foreseeable future to enable it to investigate extent of asbestos contamination.
Asbestos was first found at the site in April, with more and larger amounts discovered in May.
The initial discovery at the end of April was “a small amount of low grade, low-risk asbestos” the council said – prompting a temporary closure.
Following the discovery of a “larger amount” earlier this month, the authority announced it would remain closed.
On 17 May, council workers said the beach would be closed for the foreseeable future as it investigated “the extent of the problem and the most appropriate way of dealing with it.”
