August in Noumea is the coldest month of the year. In August, the weather in Noumea is typically warm. Average daily high temperature in August is about 19 degrees above zero. On average, Noumea has 13 partly cloudy, 11 sunny, 6 rainy, and 1 cloudy day in August. The rains are usually heavy. August as well as September is considered the most comfortable time to visit Noumea.