The Mangrove Park opened earlier this year and it was built on Al Jubail Island. The gates open at 8AM and close at 5PM. So to avoid the crowd due to the Covid-19, we decided to visit the park at 8AM LOL. By the way, there is no entrance fee and food and drinks are not allowed and they have a couple coffee shops at the entrance of the park. Other than that just enjoy the walk and we recommend to visit when it is high tide.
It was a beautiful morning walk and very surreal.