+1.97°C
El Niño, strong on NOAA's relative index
RONI for ASO 2026. Relative ONI: Niño-3.4 minus the whole tropical belt's warming. NOAA's official strength measure since 2025. NOAA CPC status: El Niño Advisory (issued 8 October 2026).
Record watch: Niño-3.4, weekly reached +3.4 °C (week of Oct 28, 2026), past the record of +3.0 °C (week of Nov 18, 2015). Records on 6 of 12 observed indices.