Bay of Plenty from 9–16 °C in winter to 22–26 °C in summer. Rainfall occurs more frequently in winter than in summer, but tropical storms in summer and autumn can produce heavy rain with high winds. Central parts of the region can receive up to 2000 mm of rainfall annually, while the eastern and western areas can receive up to 4000 mm. The sub-national GDP of the Bay of Plenty region was estimated at US$6.689 billion in 2003, 5% of New Zealand's national GDP. Agriculture, natural resources and tourism are the major industries. Most (96 per cent) of the region is defined as
Bay of Plenty foreign (planted) forest areas are found in the inland parts of the region. The Kaingaroa Forest is the world's largest planted forest, comprising radiata pine mainly used for timber. The bay contains numerous islands, notably the active volcano Whakaari / White Island, which lies 50 kilometres from the coast in the eastern bay. Other large islands include (from west to east) Matakana Island, Mayor Island / Tuhua, Motiti Island, and Moutohora Island. The Waimangu Geyser – to be seen 1900–1904 – erupted frequently, was the most powerful geyser of the world and killed 4 people in 1903. In the 2006