The South Island is the larger of the two major islands of New Zealand, the other being the more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, to the south and east by the Pacific Ocean. The territory of the South Island covers 151,215 square kilometres (58,384 sq mi) and is influenced by a temperate climate.The South Island of New Zealand is characterized by grand open landscapes. Divided by a backbone of mountain aptly called the Southern Alps, the South Island is known for spectacular mountains and fiords, large beech forests, golden sand beaches and broad plains. Generally cooler in climate than the North Island but don't forget sunhats and t-shirts - temperatures are routinely in the 30°C's in summer. In winter the sea buffers the temperatures which rarely drop much below 0°C except in mountainous regions.