I went the whole summer up till delivery with my son. Its great just don't be to tempted by the lazy river if there is one lol I layed in it for 3 hours and was a lobster at the end. No slides obviously and since the zikka virus is around I recommend some bug spray because not everything is chlorinated.
I just would recommend staying away from slides. Other than that, being in the water feels great during pregnancy (:
They have signs telling you what you can't do if you are pregnant
I went to a water park when I was 7 months I avoided all the slides. I was able to do the wave pool, lazy river, and regular pool and still managed to have fun with my fam just take it easy and try to not stay in a wet bathing suit for too long once your out of the water (easy to get a yeast infection that way) alot of kids where slipping from running around the place too so I made sure to keep my sandles on whenever I wasn't in the water. Hope this helps and just take it easy don't forget to take breaks to drink water and have a snack