I am guessing you mean the pools at the on-site resorts. They vary depending upon season. I have been there when the pools were open until 10 or 11 PM, and at times when they closed by 7 or 8 PM. I would guess the weather would be a factor as well. I have been to HRH when the temps were in the 40's and I can't imagine that the pools were open very late--even if they had anticipated that they would stay open until X hour.
You can call the hotels directly to see if you can get information, but I would guess it is subject to change. When we were at HRH last month there was a board where they posted things like park and pool hours.
PBH 407 503 1000
HRH 407 503 2000
RPR 407 503 3000