Southern Asia Pop. 21.8M Capital: Colombo 5 articles · good coverage

Sri Lanka

Severe impact · 8/10 Typically wetter in El Niño years
What changed since 9 Oct 2026

Narrative updated. “Wells are emptying and wildlife is crowding shrinking water holes — then the rains are forecast to arrive too hard”

Sri Lanka is entering the peak El Niño window with a split signal: the July–October dry season has been exceptionally parched, with wells running dry, farmer incomes shrinking and wildlife crowding shrinking water holes, while reanalysis for 9 July–6 October 2026 shows rainfall at +118% of the 1991–2020 normal and mean temperatures 0.7°C below average. Because that window is climatologically dry (normally under 20 mm), the percentage is not a meaningful anomaly; the real question is the coming October–December rains, which the canonical El Niño signal and the articles both point toward as enhanced, bringing flooding and landslide risk to the Maha season. Authorities have already restricted access to the heart of a drought-hit national park and are preparing a mix of traditional and new measures, but the articles' drought framing sits awkwardly against the measured wetter-than-normal signal and should be read as a warning about a volatile, whiplash season rather than a uniform drought.

Sources: [1][2][3] · AI-summarised from 5 articles
RAINFALL · LAST 90 DAYS
+118%

459.7 mm vs 210.9 mm normal

Reanalysis for 9 July–6 October 2026 shows rainfall at +118% of the 1991–2020 normal, but this window falls in Sri Lanka's climatological dry season (normally under 20 mm), so the meaningful signal is the outlook for the coming October–December rains, which the articles expect to be enhanced and flood-prone.

News source
TEMPERATURE · LAST 90 DAYS
-0.7°C

25.5°C mean vs 26.17°C normal

Mean temperature for the same window measured -0.7°C below normal, consistent with cloudier, wetter conditions rather than the heat stress sometimes assumed for El Niño years.

SIGNAL CHECK
Signal showing

El Niño typically makes Sri Lanka wetter. Observed rainfall is running +118% — in line with the canonical response.

NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (7.0°, 81.0°). Normals are 1991–2020. How this is computed

When it matters

Agricultural calendar for Sri Lanka and where the El Niño impact window falls

JFMAMJJASOND
Peak El Niño impact
Yala season
Maha season
Maha harvest
Peak El Niño impactRainy seasonHarvest Now inside the peak-impact window. Flooding and landslides during inter-monsoon.

Last 12 months vs normal

Observed monthly rainfall against the 1991–2020 climatology

0100200300400500600Nov2025: 615.4 mm (normal 250.3 mm)NovDec2025: 203.1 mm (normal 213 mm)DecJan2026: 176.4 mm (normal 115 mm)JanFeb2026: 166.2 mm (normal 84.7 mm)FebMar2026: 32.7 mm (normal 74.9 mm)MarApr2026: 148.8 mm (normal 123.4 mm)AprMay2026: 239.8 mm (normal 110.5 mm)MayJun2026: 141.1 mm (normal 59.4 mm)JunJul2026: 32.8 mm (normal 48.5 mm)JulAug2026: 158.7 mm (normal 56 mm)AugSep2026: 226.9 mm (normal 94.6 mm)Sep
Observed monthly rain (mm) 1991–2020 normal

Sector by sector

Agriculture

Maha season planting and harvest timing is likely to be disrupted by heavy October–December rains after a dry spell that already cut farmer incomes and left irrigation wells empty.

Water & flooding

Reservoirs and village wells are reported at low levels after the dry season, so the expected heavy rains may bring a rapid swing from scarcity to flood and landslide risk rather than steady recharge.

Health

Standing floodwater and crowded wildlife at shrinking water points raise the risk of dengue, waterborne disease and human–animal conflict, with nutrition stress likely where harvests are delayed.

Energy

Hydropower reservoirs should benefit from the forecast wetter-than-normal rains, but flood damage to transmission and access roads could offset gains and disrupt distribution.

Fisheries

Rough seas and heavy rain during the enhanced October–December monsoon are expected to cut fishing days and raise safety risks for small craft, while inland tanks may be flushed and turbid.

What happened last time

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

2023-24

El Niño contributed to dry conditions and water stress in parts of the island, with wells and tanks running low and farmers reporting reduced incomes, echoing the drought accounts in the current coverage.

unsourced background

2015-16

Strong El Niño conditions were associated with a volatile Maha season, alternating dry spells and intense rain events that damaged paddy and pushed up food prices.

unsourced background

1997-98

A very strong El Niño brought enhanced October–December monsoon rains to Sri Lanka, with widespread flooding, landslides and Maha season disruption in the south and east.

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