The main island of Saint Vincent, at , is long and wide, and has an area of , or about 88% of the total country area, 19 times that of the country's second largest island Bequia. It is dominated by the highest mountain in the country and an active volcano, La Soufrière (), which erupted violently in 1812 and 1902. The most recent eruption was on April 13, 1979. The island has many mountains and forests. The island is tropical humid, with an average of between 18 and 31 °C depending on the altitude.