Can we still go to Hk Ocean park after lunch?

We are visiting Hongkong on June 15 to 17 and will be staying at Regal Oriental Hotel. Most probably we will be settled in hour hotel around 11:am and start of exploring Hongkong maybe around 1:00pm. Is it still possible for us to go to the park by that time? And how can we get there from the hotel. I have check their website and it is not available every sunday.