Seven lifebuoys including the holding stakes were burnt over the Bank-Holiday weekend at Brittas Bay Beach.
Members of Wicklow County Council found the burnt remains of the life saving equipment at two separate locations south of the entrance to the beach.
The Lifeguard Station at the entrance to the beach was also broken into.
Speaking to Wicklownews Water safety officer with Wicklow County Council, Robert Kelly, said:
“Gardai are investigating both incidents, it is very disappointing as we are working hard to keep the beach in top condition for all visitors. It is pure vandalism and will cost Є1,000 to replace, we have a stock of lifebuoys and we replaced them immediately.
A small number if items were taken from the Lifeguard Station, which had only been open for 5 days.
I would like to remind members of the public if they see anyone tampering with Lifebuoys or should notice any missing on any waterway throughout the county to contact Wicklow County Council.”
Gardai are also investigating a crash within the bounds of the South beach car park, where a car was being driven at high speed.