Peninsular Malaysia grows oil palm at a density few places match. In the May 2026 GlobMaps drought update, the two states the analysis flags as the peninsula's hot zone — Negeri Sembilan and Selangor — sit right on top of that planting belt, while the country as a whole reads below its historical water balance on a three-month view.
Malaysia-wide: a third of the grid is past the drought line
SPEI-3 measures the last three months of water balance against the same season in the historical baseline. Readings below −0.5 are conventionally treated as drought conditions.
| Indicator | Value (May 2026) |
|---|---|
| Malaysia SPEI-3, national mean | −0.398 |
| Grid cells with SPEI-3 below −0.5 | 34.4% (240 of 698) |
Source: GlobMaps drought climatology, Malaysia, May 2026 update.
The national mean stops short of the −0.5 line. The distribution does not: roughly a third of Malaysia's grid cells are already past it. That gap between the average and the tail is the whole reason to look at this sub-nationally — a country-level number can read "mild" while a third of the map is not.
Where the dryness sits — and what is planted there
| Area | MDI (May 2026) | Note |
|---|---|---|
| Negeri Sembilan / Selangor | 0.500 | Hot zone of the May 2026 update |
MDI (Multi-Drought Index) combines the water-balance signal with vegetation and soil-moisture indicators into one score per state. What makes the May 2026 reading worth a second look is not the number on its own — it is where it falls. Negeri Sembilan and Selangor sit inside the peninsula's core plantation geography, so the driest part of the map and the most planted part of the map are the same part of the map.
That overlap is the finding. A drought signal in a sparsely farmed area and the same signal across a planting belt carry very different consequences, and only a state-level view tells them apart.
The ENSO label is Neutral. The signal is not waiting for it.
The official relative index, RONI, read +0.47 for AMJ 2026 — below the +0.50 threshold, so basin-wide conditions are Neutral, not El Niño. The dryness above does not depend on that label: SPEI-3 and MDI are measured from observed water balance, vegetation and soil moisture, not derived from an ocean index. Waiting for a named El Niño before treating a planting belt as exposed means waiting for a headline that measurement has already overtaken.
How to read this if you carry the risk
For plantation lenders, crop insurers and buyers, the practical question is not "is Malaysia in drought" but "is my exposure in the third of the map that is". A book concentrated in Negeri Sembilan and Selangor and a book spread across all 16 states share the same national average and carry different risk.
The picture is refreshed monthly — the drought update lands on the 8th of each month across all 16 Malaysian states — so the same states can be tracked forward rather than assessed once.
What this analysis does not say
- It is not a yield forecast. A drought reading describes water and vegetation conditions, not tonnage.
- It says nothing about CPO prices. Market outcomes depend on trade, stocks and demand this data does not observe.
- It is not a seasonal ENSO forecast. RONI +0.47 is the measured AMJ 2026 state, not a projection.
What it is: a dated, state-level measurement of where water stress actually sat in May 2026 — the kind of number that belongs in a risk file because it can be checked later.
We publish the Southeast Asia drought picture at sub-national level as each monthly update lands. More at globmaps.com.