Planning for the weather is a good way to make your trip to L'Île-des-Pins relaxing and enjoyable, especially when you're splurging. The hottest months are usually February and March with an average temp of 78°F, while the coldest months are August and July with an average of 71°F. The rainiest months in L'Île-des-Pins are March, January, April, and February, with each month seeing an average of 7 inches of rainfall.