 Under Köppen’s climate classification, La Rochelle features an oceanic climate.Although at the same latitude as Montreal in Canada or the Kuril islands in Russia, the area is exceptionally mild throughout the year due to the influence of the Gulf Stream waters, the summers are relatively warm, and insolation is remarkably high, in fact, the highest in Western France including sea resorts much further in the south such as Biarritz.La Rochelle seldom experiences very cold or very warm weather.