Marine heatwave conditions in the Bay of Plenty have now lasted an unprecedented full year – the longest continuous marine heatwave so far recorded for New Zealand. Pronounced marine heatwave conditions continued during the winter; the Bay of Plenty never really experienced normal winter ocean temperatures. In the Hauraki Gulf, 274 days had marine heatwave conditions, which is 75% of the year, says Smith. The long-running marine heatwave conditions are likely caused by a combination of factors. Recent marine heatwaves around New Zealand have caused die-offs of some marine species, including coastal kelp forests and penguins.

Source: Stuff November 14, 2022 18:13 UTC