El Niño and palm oil output: a slow-moving signal
In late 2026 the El Niño index reached +2.46°C for August–October, a strong event. For palm oil, that number matters less for what it says about today than for what it says about next year's harvest.
Why the effect is delayed
El Niño shifts rainfall away from Southeast Asia. Oil palms respond to dry spells in stages:
- Water stress during flower formation changes the sex ratio towards male flowers, which produce no fruit.
- Bunches that do form can abort or stay light.
- A fresh fruit bunch takes roughly 6 months from flowering to harvest, and the flower's sex is set well before that.
The result is that a dry spell today shows up as lower output roughly 6–12 months later. That is why the market reacts to the index long before the harvest falls.
What the last big event did
The 2015–16 El Niño is the closest comparison. Malaysian output in 2016 fell about 13% on the year, and by 18–25% in the worst months of March to May, almost exactly a year after the index peaked.
What the data shows
On my Palm Oil Market Monitor, every month since 2015 is plotted as the El Niño index nine months earlier against Malaysian production compared with a year before. The fitted line says each +1°C goes with about 2.6 percentage points less output nine months later.
The correlation is only about −0.2. That sounds weak, and it is a useful reminder of three things:
- Most months are neutral. The index spends most of its time near zero, where weather is only one of many drivers alongside labour, fertiliser, replanting and tree age.
- The signal lives in the extremes. Strong events like 2015 and 2023 drive most of the relationship.
- Other things move at the same time. The 2021 labour shortage cut Malaysian output with no El Niño at all.
How I use it
- Direction, not size. With the index above +1.5, I treat lower output 6–12 months out as the base case, but I don't trust a single percentage.
- Watch stocks for confirmation. When El Niño and heavy stocks disagree, as they did in late 2026 with record Malaysian stocks, prices often hold above what stocks alone justify because the market is pricing next year's shortfall.
- Combine it with seasonality. Malaysian output normally peaks around September–October and bottoms in February. An El Niño hit to the low season tightens the market more than the same hit in the peak.
For education only. Not trading advice.