Weekly El Niño, La Niña and IOD Indices

The relative Niño3.4 index for the week of 2–8 November 2026 is +2.75 °C, in the very strong El Niño range on the BMKG scale. The IOD stands at +0.75 °C, above the positive IOD threshold, and the 30-day SOI at -15.1, below the threshold, leaning El Niño. A single week is not enough to declare an El Niño or La Niña event: the Bureau of Meteorology requires monthly values to stay beyond the threshold. Source Bureau of Meteorology Australia, compiled and verified by IPOSS, updated weekly.