I had the opportunity to visit Wet 'n' Wild Sydney a few weeks ago when I was visiting Amber in Australia. The park just opened on December 12th and we visited on the 27th (only day we had the chance) and enjoyed the park despite reaching capacity. It was brand new, so there was many growing pains and issues they have to sort out, but I will give them the benefit of the doubt. I'll explain throughout my photos
The park is located somewhat far from downtown Sydney, but is easily reached by public transport. You can normally take a North shore and Western line train from Central Station out west towards Richmond or Emu Plains and get off at Paramatta. This direct line (only a few stops) was under construction when we visited, so we had to take the Airport line down to Glenfield to transfer to the Cumberland line up towards Paramatta (about 1.25 hrs). From Paramatta the park offers a shuttle bus that runs continuously through the day, from an hour before park opening until an hour after park closing.
I'll continue with the photos!