On the Adventure the pools are open 24 hours. At night usually one or two pools and hot tubs were closed for cleaning but there was always at least one of each open. I would assume other ships are the same but I am not sure.
this is not true on the navigator. all pools are closed at night. im not positive but i believe hot tubs were open. but thanks for the tip of adventurer i go this summer and that was a main concern for me!!!
Mariner and Voyager pools are open 24 hours... usually one or more might be closed... but there is at least one that is open and most of whirlpools are open. I think this is standard on most of the fleet.... as all the ships I have been on had at least one pool open all nite. Not sure why Navigator would be different.