Water parks in the evening
 

Looking at park hours, the Disney waterparks open until 8pm in August, and although this year’s hours aren’t up for Volcano Bay, last year it was open until 9.

Is it worth visiting late afternoon / evening? What are the crowds like then?

We have been twice in August and I think they shut at 8pm (Typhoon Lagoon and Blizzard Beach).

We always go in the afternoon - it's not too busy but as we haven't been in the morning I can't compare.