Police are urging youngsters to 'think before they jump'.
Officers took to social media to say the sunnier skies and warmer sea temperatures see more people jumping into the Island's harbours.
However, authorities have warned recent incidents have seen people putting themselves in grave danger.
The constabulary says many areas around the Island only have shallow water - even at high tide, and want parents to warn their children the dangers of tombstoning.
How much has been spent on carbon literacy training?
Gov made no assessment before apprentice scheme changes
Government strategy to promote local food under spotlight
Local man to run famous marathon for Children's Centre
Are there supply issues at the meat plant?
What's the target patient to GP ratio?
Plans for new high school to be discussed
Katie Hopkins confirms Island return