El Niño may mean increased heat and possible drought in Aotearoa.

Explainer - We are being told to look out for El Niño in the coming months and for it to peak over our summer. But what exactly does that mean?

The "climate driver" is likely to bring drier, hotter and windier conditions to much of New Zealand.

In its seasonal climate outlook for June through August, Earth Sciences New Zealand (ESNZ) said there's a 95 percent change of El Niño conditions, an even higher outlook than the United Nations' World Meteorological Organisation which puts the odds at 80 percent.

The UN has also issued a warning telling the rest of the world to be prepared for extreme heat El Niño may bring.