Swimming facilities at the National Sports Centre will be closed from Saturday 4 August 2018 to enable work to start on a major upgrade.
The refurbishment of the competition and leisure pools will progress over the next nine months.
The two flume rides will also be replaced and the new facilities are scheduled to reopen in May 2019.
All other facilities at the NSC will remain open as normal.
People will still be able to access the three other public swimming pools in Castletown, Peel and Ramsey.