Whether you live in Austin or are visiting, take advantage of Austin’s outdoor warm water pools! The most famous is the three acre, spring-fed Barton Springs Pool which is generally 68 degrees in winter and up to 72 degrees during the summer months. Take the annual New Year’s Day Polar Bear Splash at 10am on 1 January, 2016! The spring-fed Deep Eddy Pool, the oldest swimming pool in Texas, maintains a temperature between 68 and 72 degrees year round. The Big Stacy Park Pool originally was filled with spring water from Walsh Springs, Today it receives a mix of city water and 100 degree well water pumped from the Trinity Aquifer. This water combo keeps the temperature around 80 degrees year round! I would do my Polar Bear Splash at this pool! Bartholomew Pool (1800 East 51st Street, 78723) is heated during the winter.