South-Eastern Asia Pop. 286M Capital: Jakarta 5 articles · good coverage

Indonesia

Severe impact · 9/10 Typically drier in El Niño years
What changed since 9 Oct 2026

Score moved 8 → 9 . “Fire season has started early and the rains that normally end it are still weeks away”

Indonesia is bracing for what officials and media are calling a possible 'Godzilla El Niño', with the fire season igniting early and drought conditions deepening across the archipelago. Reanalysis for 9 July to 6 October 2026 shows rainfall about 93% below the 1991–2020 normal and temperatures roughly 0.4°C above average, though this is the climatological dry season when monthly totals are normally under 20 mm. The critical question now is the coming wet season: forecasters expect its onset to be delayed by around a month, which would push back main rice planting and intensify pressure on water, energy and health systems.

Sources: [1][2][3] · AI-summarised from 5 articles
RAINFALL · LAST 90 DAYS
-93%

6.3 mm vs 95.7 mm normal

Reanalysis shows rainfall across Indonesia from 9 July to 6 October 2026 running about 93% below the 1991–2020 normal, consistent with the crippling drought and early fire season described in the articles, though this window is climatologically the dry season when totals are normally under 20 mm.

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TEMPERATURE · LAST 90 DAYS
+0.4°C

25.21°C mean vs 24.8°C normal

Mean temperatures over the same July–October window ran about 0.4°C above normal, a modest warming that still amplifies evaporation stress and fire risk during the prolonged dry spell.

SIGNAL CHECK
Signal showing

El Niño typically makes Indonesia drier. Observed rainfall is running -93% — in line with the canonical response.

NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (-5.0°, 120.0°). Normals are 1991–2020. How this is computed

When it matters

Agricultural calendar for Indonesia and where the El Niño impact window falls

JFMAMJJASOND
Peak El Niño impact
Wet season
Dry season
Main rice planting
Main rice harvest
Peak El Niño impactRainy seasonDry seasonPlantingHarvest Now inside the peak-impact window. Drought, peat & forest fires, haze, delayed wet season.

Last 12 months vs normal

Observed monthly rainfall against the 1991–2020 climatology

0100200300400500Nov2025: 332.5 mm (normal 168.6 mm)NovDec2025: 342.7 mm (normal 373.9 mm)DecJan2026: 398.2 mm (normal 401.8 mm)JanFeb2026: 530.7 mm (normal 314.2 mm)FebMar2026: 224.9 mm (normal 245.1 mm)MarApr2026: 44.3 mm (normal 191.2 mm)AprMay2026: 168.6 mm (normal 124 mm)MayJun2026: 34.8 mm (normal 100.7 mm)JunJul2026: 0.4 mm (normal 54.5 mm)JulAug2026: 0 mm (normal 20.8 mm)AugSep2026: 5.6 mm (normal 30.1 mm)Sep
Observed monthly rain (mm) 1991–2020 normal

Sector by sector

Agriculture

Delayed wet-season onset is expected to postpone main rice planting by about a month, cutting yields and raising food-price pressure into the March–April harvest.

Water & flooding

Reservoirs, irrigation canals and groundwater are being drawn down through an unusually severe dry season, with rationing likely in Java and Bali if the rains arrive late.

Health

Haze from peat and forest fires is expected to drive respiratory illness, while heat stress and reduced water access raise nutrition and diarrhoeal risks.

Energy

Falling hydropower output and rising cooling demand are projected to tighten the grid, with diesel and coal backup generation filling the gap.

Fisheries

Warmer coastal waters and shifting currents are expected to displace fish stocks, while haze and rough conditions disrupt small-scale fishing days.

What happened last time

Past El Niño episodes and how Indonesia responded. See the full ENSO timeline →

2023-24

El Niño conditions contributed to a delayed wet season and below-normal rainfall, stressing rice planting schedules and raising fire risk in Sumatra and Kalimantan.

unsourced background

2015-16

A strong El Niño brought a prolonged dry season, widespread peat fires and haze, delayed monsoon onset and reduced rice production across Indonesia.

unsourced background

1997-98

One of the strongest El Niño events on record produced a severe drought and massive peatland fires across Kalimantan and Sumatra, blanketing the region in haze and cutting rice output.

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