August in Sanary-sur-Mer is the warmest month of the year. In August, the weather in Sanary-sur-Mer is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Sanary-sur-Mer has 31 sunny days in August. August as well as June, July, and September is considered the most comfortable time to visit Sanary-sur-Mer.