In December, the weather in Batemans Bay is typically warm. Average daily high temperature in December is about 24 degrees above zero. On average, Batemans Bay has 15 rainy, 7 sunny, 6 partly cloudy, and 3 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and June is considered the most uncomfortable time to visit Batemans Bay.