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

Warnings for NSW beaches and coast amid weekend rescues; 4-metre swells predicted

08:16 EDT

Authorities have issued warnings for dangerous surf conditions, including waves bigger than four metres, expected along much of the New South Wales coast today.

Dozens rescued as dangerous swell slams south-east Queensland

06:26 EDT

At least 50 people have been rescued in a as dangerous swells continue to slam the coastline in the wake of Tropical Cyclone Gita.

Scams, fake news advertised on Bureau of Meteorology website

06:17 EDT

Advertisements for scam pages have appeared on the Bureau of Meteorology (BOM) website.