Weather will likely play an important role when you plan your trip to Les Sables-d'Olonne, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 19°C, while the coldest months are February and January, with an average of 9°C. Average annual precipitation for Les Sables-d'Olonne is 761 mm.