I made a few visits there in the winter and it's not too bad then. I went on a weekend during the last bit of summer that day and the parking lot was overflowing with cars! I had no idea there was upper parking. Thankfully it was fairly empty. It was full by the time we left to go to the aviary.
Yeah if you go early it isn't so bad, and its great during the winter! No one is there! I'm curious to see what they will do with the seals... I'm wondering if it is a heated tank because it gets really cold here during the winter and the Zoo is practically in a mountain side. But I love going during the winter because they have nice heated buildings there are so few people. The only problem is that most of the Savannah Animals hide away. Like the Elephants, giraffe's, rhino's, and others get put away and you can't see them. But I would love to see the Polar Bear when it snows
I love going to zoos in the winter time. Except that most of the African hoof animals are inside most of the time. Unless I'm in the southwest where it doesn't get too cold, like around New Mexico although last winter was pretty cold. The seals/sea lions should be okay. They've got quite a bit of blubber to keep them warm. And the pool is probably kept at a certain temp year round.
If it's salted water it may take a bit more to freeze it. The Oregon zoo's sea otter & sea lion exhibit has never had frozen water issues, but the hippo pool and giraffe water area have had frozen water. Needless to say they were not outside.
Uhh...I've been to... a lot... Almost 30? I think. This is including zoos, aquariums, sanctuaries, aviaries and one roadside zoo that I will never visit again.