In June, the weather in Les Sables-d Olonne is typically warm. Average daily high temperature in June is about 20 degrees above zero. On average, Les Sables-d Olonne has 14 sunny, 12 partly cloudy, and 4 rainy days in June. The rains are usually light. June as well as August and September is considered the most comfortable time to visit Les Sables-d Olonne.