While I believe Aquatica heats the water, be advised we've had several days this winter where the air temp was below 35f .... I don't plan to use my Aquatica pass again before mid May ....
from the Aquatica Web Site:
Water Temperature
At Aquatica, the water is as warm as the South Seas themselves-actually, warmer. We have a state-of-the-art climate control system that adjusts the water temperature according to the weather so that it's always just right. The water can be heated up to 84 degrees.