RNZ2 Jul, 2026 05:32 AM6 mins to readA warming of sea-surface temperatures across the tropical Pacific during El Nino can influence weather patterns around the world, although its effects in New Zealand are often less direct and less predictable. Photo / Getty ImagesBy Kate Newton of RNZEl Niño has been observed for centuries - starting with Peruvian fishermen who noticed that in certain years the ocean was warmer, and brought more tropical fish to their nets.
But it’s only been in recent decades that live monitoring of
