From the DC website:
Water Temperature
The temperature of our pools remains constant throughout the year. The fresh water Serenity Bay and Wind-away River are maintained around 85-88 F (30 C). The salt water dolphin pools maintained around 72 F, and The Grand Reef are 77 F (25 C).
You will have your option to wear either a wetsuit OR a vest. Whichever is your preference.
We were there on January 1st and didn't find the water to be that cold. Colder, certainly, than other water in the park (the lazy river is warm, warm, warm) but not cold enough to be considered uncomfortable. But I will say that we are from Canada (EH!
) so we are used to cold water. If you are from a predominantly warmer region you might not adjust as well.
Comfort in a certain water temperature varies from person to person. When I take a shower, I like the water to be a half degree before scalding.....DH sets the temp to "just barely warm". So I think it will depend on how sensitive you are to cooler water. In any case, 72 degrees shouldn't make your lips turn blue
.