Vandals have caused about £5,000 worth of damage to the Castle Green pavilion in Broughty Ferry.
Police are appealing for information following the break-in at the waterfront site, which is believed to have taken place overnight from Sunday into Monday between 4pm and 6.40am.
Nothing is said to have been stolen.
A Tayside Police Division statement reads: “Entry was gained through an external disabled toilet, with a number of internal doors and lockers forced open once those responsible got inside.
“At this time we do not have confirmation of anything having been stolen, but the damage caused is estimated to be in the region of about £5,000.
“If you have any information that could assist our investigation, please call 101 or speak with any police officer. Also, information can be provided anonymously through CrimeStoppers on 0800 555 111. Our reference is incident 0636 of August 10.”