Another marine heatwave is forming around parts of New Zealand after sea surface temperatures warmed considerably last month, Niwa forecasters say. In this region, marine heatwave conditions were affecting Northland and northern Auckland's coastal waters, and extended west into the Tasman Sea. Sea surface temperatures around New Zealand are on the rise again, and Niwa is predicting another marine heatwave this summer. A marine heatwave is an extended period of extremely warm ocean temperatures that can extend up to thousands of kilometres. He said a marine heatwave this summer would be the third in four years.

Source: New Zealand Herald November 19, 2020 20:26 UTC