Sri Lanka heatwave concerns are rising after Trincomalee hit 39.9°C, while a strengthening El Niño increases the risk of extreme heat into 2027.
The Sri Lanka heatwave is drawing growing concern after several areas recorded unusually high temperatures, while climate experts warn that stronger El Niño conditions could increase heat risks into 2027.
On July 25, 2026, Trincomalee recorded a maximum temperature of 39.9°C, the highest reported in Sri Lanka that day. Polonnaruwa reached 38.6°C, while Mullaitivu, Monaragala and Vavuniya all exceeded 37°C, according to Meteorology Department data reported at the time.
Department of Meteorology climatologist Malith Fernando has warned that Sri Lanka could experience exceptionally high temperatures by March 2027 as El Niño strengthens. He said the country had previously reached 40°C on April 10, 1983 and identified the Northern, North Central and Eastern Provinces, along with Hambantota, as areas facing greater heat exposure.
However, claims that Sri Lanka’s nationwide average temperature will approach 40°C should be treated cautiously. The figures of 33°C to 35°C cited for 1991-2022 appear to refer to typical maximum daytime temperatures rather than the country’s overall mean temperature. Likewise, current international forecasts indicate a heightened risk of exceptional global warmth, but do not guarantee that March 2027 will produce the hottest temperature ever recorded worldwide.
The broader climate signal remains significant. The World Meteorological Organization says a strong El Niño is developing, with above-normal temperatures expected across many regions. A positive Indian Ocean Dipole is also expected to develop, potentially influencing regional weather patterns.
As the Sri Lanka heatwave risk continues, health precautions remain important. People should stay hydrated, reduce exposure to intense afternoon sunshine and wear lightweight, light-coloured clothing.
Children, older people and others vulnerable to heat stress require particular attention.
The 39.9°C reading in Trincomalee does not prove that Sri Lanka will break its national temperature record in 2027. But with El Niño strengthening, the possibility of more frequent and intense heat deserves close monitoring.
