A layer of felt on the upper roof lifted off, allowing water to pour into the premises.
Over 50 buckets have had to be used to collect water pouring in to the St Brigid's boxing club in Kildare Town.
Speaking to Kfm, club founder Paddy Phelan said it has endured a "massive amount of water damage" following the recent storm.
A layer of felt on the upper roof lifted off, allowing water to pour into the premises.
"We are in serious trouble," he said.
"We won't know what damage is done to the ring until the plastic is lifted off."
Paddy said the punching bags are also soaked, which can result in "rot" from the inside out.
Some training is still going ahead tonight in cordoned off areas.
Locals are advised to keep an eye on the club's social media pages for an update.

Speed Enforcement To Increase In Kildare With 21 New Camera Zones To Be Rolled Out In January
Over 400 Motorists Caught Speeding So Far Today, Including A Driver In Kilcock
Transport Minister In Discussions With Irish Rail About Extending Late-Night Trains Beyond Christmas
Bus Shelters Treated As Luxury Rather Than Standard, With 500 Kildare Bus Stops In Need Of Upgrades
Recruitment Announcements Don’t Add Up As Garda Numbers Stagnant In Kildare South, Says Local TD
Court Orders Demolition Of 29 Unauthorised Modular Homes Built By Kildare Developer
170 People Arrested In Past Week For Driving Under Influence Of Alcohol Or Drugs
€239k For Clane Playground As Kildare Secures Funding For Just Two Projects