The Jesus Green Lido in Cambridge will be closed for the rest of April.
The outdoor swimming pool, which has welcomed swimmers since the 1920s, is a popular summer destination.
It is located on Jesus Green, along the River Cam, and is one of the longest outdoor pools in Europe.
The city council has announced the lido will be shut to visitors from Tuesday 2 April 2024 to undergo "vital works".
It is hoped the facility will reopen to swimmers on Saturday 4 May 2024.