The reason given is a UK-wide shortage of chlorine, the chemical added to pools to kill bacteria and make them safe for people to use.
However, today Falkirk Council who run the centre revealed that it was reopening from 12.30pm today but only for scheduled swimming lessons.
It will remain closed for public swimming until 12pm on Friday, June 24.
In a statement on the website the reason given for this was “due to a limited amount of the required pool chemical being delivered”.
It continued: “We would love to be open to all, however, due to the reduced volume received, we are managing the restricted supply as best we can.
“The situation has arisen due to a UK-wide shortage of a specific chemical essential to ensuring the water quality of the swimming pool. Our supplier is doing their utmost to source this chemical as quickly as possible.
“Thank you for your patience as we attempt to resolve this supply issue. We will continue to keep everyone up to date on this situation via our website and social media channels.”
They reminded customers that all other facilities at the Mariner Centre remain open, including the soft play area, and people can still access casual swimming at Grangemouth Sports Complex and Bo’ness Recreation Centre until the pool reopens for public swimming later this week.