The swimming pool at West Kirby Concourse will be shut until at least early April for repairs to a leak.
The popular public facility closed for excavation and investigation work on Monday 18 March after it began losing water.
Wirral Council say it will not re-open for “a minimum of two weeks” and Swim Wirral – which runs lessons for children at the Concourse – has contacted parents cancelling sessions for the next few weeks.
The local authority has told West Kirby Today that a large section of pipework the entire length of the pool needs replacing.
A spokeswoman said: “This means digging down, draining the pool partially, replacing the pipework and then re-tiling before re-filling the pool and getting it up to temperature.
“Our leisure teams have commissioned a specialist contractor who commenced work this week. The pool will be closed for a minimum of two weeks until works are completed.
“Leisure staff have contacted all users to make alternative arrangements where possible.”