It's the third time the sails have been replaced in the last five years after they were destroyed.

This time, higher supporting steel posts will be erected at the skate park before the new flame-retardant sails are attached.

It will cost Dubbo Regional Council more than $50,000.

Council's acting manager recreation and open space Ben Pilon said he hoped raising the height of the supporting poles would minimise any future damage.

ALSO MAKING NEWS:

"Skate park users have been inconvenienced too often by the senseless damage to the sails by vandals and council then has to divert money and staff from other important community projects to repair or replace damaged infrastructure," Mr Pilon said.

The shade sails were last vandalised in April.

Security camera footage captured a group of young people climbing on garbage bins and tearing the sails up. It then shows a car pull up and drop off other youths who join in creating the damage.

The footage was sent to Orana Mid-Western Police District for investigation.

Dubbo mayor Ben Shields said there were CCTV cameras covering the skate park and all incidents of vandalism were reported to the police.

"The costs for council are significant every time our staff are faced with the damage caused by idiotic vandals with no regard for other people in our community," Cr Shields said.

"These senseless acts at the skate park alone have cost Council more than $70,000 in recent years."

In 2017/18 vandalism cost council about $87,000. In the 2016/17 financial year it was $81,000.

Council offers a reward of up to $2500 for information leading up to the conviction of any person who has committed wilful damage or theft of council property.

Anyone who witnesses vandalism should contact the Dubbo police station on 6883 1599.