We were there last Sunday in the pouring rain. We were able to feed the dolphins, see the dolphin show, the Shamu show, Wild Arctic, have lunch, etc in the morning while it rained. We were able to sit far enough up to be out of the rain for the shows, which was nice. We did notice that Kraken wasn't running during this time. Not sure about Atlantis (but we were wet enough already, so the water ride didn't hold much appeal). It cleared up about 1pm and the crowds got significantly larger for the rest of the day. In the afternoon we saw everything else we wanted to, had our Dinner with Shamu, and finished the night with the "Shamu Rocks America" show, which was great. The rain was a bit miserable in the morning (I was a bit cold, as I had on shorts under my poncho), but it certainly kept the crowds away! Even my DH, who is not a big theme park fan, said he was pleasantly surprised at how much he liked SeaWorld. We had a nice dinner with Shamu, which I will post about separately....P