Indices
NASA GISS temperature departures from 1951-1980, global monthly and tropical yearly.
Limits. The yearly tropical value only appears once the year is complete.
How to read it
degC above normal. Dated the 15th of the month (monthly) or 1 July (yearly).
Why it matters for Koh Samui
Shows the global heat that El Nino adds on top of long-term warming.
ENSO status now
- ONI (NOAA CPC)
- +1.80 °C, JJA 2026 (previous +1.39 °C)
- RONI (NOAA CPC)
- +1.36 °C, JJA 2026
- Nino 3.4 weekly (NOAA CPC / OISST)
- +3.0 °C anomaly, week of 16 Sep 2026 (SST 29.6 °C)