Get ready to take one hell of a ride - the date for the grand opening of Wet'n'Wild Sydney is set.

The Prospect water park will open to the public on Thursday, December 12 and Wet'n'Wild Sydney CEO Chris Warhurst confirmed construction was on schedule.

Brightly coloured fibreglass pieces of the world's largest water park have been coming together for some months now on the 25ha site between the M4 motorway and Prospect Reservoir and Sydneysiders have been eagerly watching the progress of this new western wonderland.

Mr Warhurst said online ticket sales were "overwhelming".

"Everything is looking amazing and we're right on track," he said.

PHOTO GALLERY: From muddy paddock to mega park

LOOK BACK: Wet'n'Wild starts to take shape in the west

Gold season pass holders will soon receive invitations to exclusive preview sessions at the park, held in the days before the official opening.

media_camera Construction is on track for a December opening said Wet'n'Wild Sydney CEO Chris Warhurst.

media_camera Final touches are starting to appear on the park's rides.

media_camera Construction will soon draw to a close at the waterpark, which opens in December.

However due to strong sales the gold season pass, which costs $124.99, will only be available for purchase until this Sunday.

Single day admission is priced at $69.99 for people over 110cm tall, $54.99 for people under 110cm, and children aged three and under are free.

READ MORE: Wet'n'Wild loses fans over premium prices

Mr Warhurst also confirmed a free shuttle bus service will ­operate between Parramatta train station and the ­water park through the peak season.

Local bus operators will be contracted to run the service and a schedule will be finalised early next month.

Wet'n'Wild Sydney will be home to more than 40 slides and attractions including some of the tallest and fastest water rides in the world.

media_camera Wet'n'Wild Sydney will be home to some of the fastest water rides in the world.

media_camera Some of the massive water slides taking shape.

media_camera Some of the world's biggest slides will feature in the park.

media_camera Wet'n'Wild at Prospect.

They include the 18m-tall Dark Tornado, part of the southern hemisphere's first Tornado Wave and Tantrum Alley attraction, the towering Aqua Loop and Whizzard Racer - an attraction where riders stand on a trapdoor and drop 20m before doing a 360 degree loop.

It will also have the world's largest Sky Coaster, which lifts passengers to a height 10m higher than the sails of the Sydney Opera House, before they plummet to earth, face first, at 120km/h.

The $115 million project is set to create the equivalent of 300 full-time jobs when it is up and running.

At the project's launch last year, Premier Barry O'Farrell said Wet'n'Wild was predicted to attract about 900,000 visitors a year - including 20 per cent from overseas and interstate - and generate more than $500 million for the state's economy in the first 10 years of operation

media_camera Wet'n'Wild Sydney will be home to some of the fastest water rides in the world.

Originally published as Wet'n'Wild opening date revealed