July in Margaret River is the rainiest, the windiest, and the cloudiest month of the year. In July, the weather in Margaret River is typically warm. Average daily high temperature in July is about 16 degrees above zero. On average, Margaret River has 20 rainy, 9 partly cloudy, and 2 sunny days in July. The rains are usually heavy. July as well as June, August, and September is considered the most uncomfortable time to visit Margaret River.