July in Ko Samet is the rainiest, the windiest, and the cloudiest month of the year. In July, the weather in Ko Samet is typically hot. Average daily high temperature in July is about 29 degrees above zero. On average, Ko Samet has 31 rainy days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Ko Samet.