Fairfax Media Network

NINO3.4 Index

  • index
  • SOI
  • NINO3.4

The NINO3.4 index is one of several El Niño/Southern Oscillation (ENSO) indicators based on sea surface temperatures.

NINO3.4 is the average sea surface temperature anomaly in the region bounded by 5°N to 5°S, from 170°W to 120°W. This region has large variability on El Niño time scales, and is close to the region where changes in local sea-surface temperature are important for shifting the large region of rainfall typically located in the far western Pacific.

An El Niño or La Niña event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niño or -0.4°C for La Niña for at least 6 consecutive months.

Display Your Local Weather

Weather News

Early snow heading to Australian Alps

13:47 EST

A cold front is surging across southern Australia today and will reach the Alps on Sunday morning.

Adelaide's early start to winter

11:35 EST

A pair of fronts are set to bring a chilly start to winter for the South Australian capital.

Cyclone Debbie rebuild continues for 'heartbroken' north Queensland residents

09:36 EST

It has been almost two months since Tropical Cyclone Debbie hit the north Queensland coast and many residents in the Whitsundays are still rebuilding their lives.