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

Late-season cyclone potential

16:30 EST

A tropical cyclone may form in Australian waters during the next 24 hours, although the system will have little impact on our mainland.

Wintry chill grips six states and territories

14:58 EST

Parts of eastern and southeast Australia experienced their coldest temperatures in at least six months this morning.

Hobart heritage buildings not built to withstand Tasmania's toughest wind speeds

11:20 EST

Tasmania's heritage buildings are taking a battering from gusty winds they were not designed to withstand.