You can plan your beach trip with this snapshot of year-round temperatures in L'Île-des-Pins: The hottest months are usually February and March, with an average temperature of 26°C, while the coldest months are August and July, with an average of 21°C. The rainiest months in L'Île-des-Pins are March, January, April and February, with each month seeing an average of 185 mm of rainfall.