January in Nelson Bay is the cloudiest and the hottest month of the year. In January, the weather in Nelson Bay is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Nelson Bay has 13 rainy, 8 sunny, 8 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February, March, June, and November is considered the most uncomfortable time to visit Nelson Bay.