In May, the weather in Vũng Tàu is typically hot. Average daily high temperature in May is about 31 degrees above zero. On average, Vũng Tàu has 26 rainy, 3 sunny, and 2 partly cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Vũng Tàu.