How cold is the water around Antarctica?

The children had fun learning how to read a thermometer beginning with warm water simulating that found around the Atlantic Ocean off the Florida Gulf coast at a balmy 65 degrees. They slowly added cooler water as we moved to the Atlantic Ocean off the eastern Florida coast and the Pacific Ocean off the northern California coast. We continued to cool our water as we went to the Pacific Ocean off the Oregon and Washington coast and then a little closer to home in the Atlantic Ocean off the New England coast. Then we plunged into the ice cold water and brought our temperature down to 30 degrees in the Antarctic Ocean. It was amazing to watch and listen to them grasp the understanding of counting by 2's on the thermometer - counting backwards by 2's at that. One would have thought we actually took a field trip to Antarctica!