The Department of Infrastructure is advising youngsters, following reports of them jumping into the sea from the back of Peel Castle.
The DOI says it received reports earlier this week, and are emphasising how dangerous it is.
In a post on social media the department says children need to be awards of tides, wave heights, and 'cold water shock' - particularly at this time of year.
It adds these are only a few of the dangers associated with this type of activity.
Crogga still owes the Isle of Man Government money
DoI says works at Liverpool ferry terminal will take longer
Over 50 employment tribunals outstanding at the DoI
Free period products bill raises cost concerns for MHKs
Key road in Ramsey to re-open early this afternoon
Want to start training to become a nurse?
Appeal launched after fly-tipper filmed dumping rubbish
Prepare your pets for Bonfire Night, says Manx charity