[REVISION HISTORY]

Sri Lanka weather warnings July–October 2026

Updated 15 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-29 04:53 UTC → 2026-10-21 18:24 UTC · added ~~removed~~

Sri Lanka weather warnings ~~July–September~~ July–October 2026

~~Following continued volatility~~ Throughout August and September 2026, Sri Lanka experienced volatile weather characterized by high heat, heavy rainfall, and hazardous maritime conditions. In late August, increased temperatures were noted in the Eastern Province and several northern districts, alongside forecasts for heavy rainfall exceeding 75 mm in the Sabaragamuwa and Western Provinces. An amber advisory was issued in late August for rough seas, with wave heights reaching up to 2.5 meters. By early September, ~~weather warnings intensified~~ an amber-level lightning advisory was issued for the Eastern and Uva provinces due to dangerous electrical activity. Heavy rainfall continued, with accumulations reaching 100 mm in some locations by mid-September, raising concerns regarding flash flooding and hazardous road conditions. In late ~~September.~~ September, weather warnings intensified. On 20 September, the Department of Meteorology forecast ~~heavy~~ rainfall exceeding 100 mm for parts of the Sabaragamuwa and Central provinces, specifically Kandy and Nuwara Eliya. Afternoon or evening thunderstorms were expected in the Uva, Eastern, and Northern provinces, accompanied by winds of 30–40 km/h in the central highlands and North Central provinces. Maritime conditions were expected to be rough, with wind speeds reaching 50–60 km/h from Matara to Batticaloa via Hambantota, influenced by a low-pressure area in the Andaman Sea. On 21 September, an An amber advisory for heavy rainfall was issued for ten districts across the Western, Sabaragamuwa, and North Western ~~provinces. This warning, effective until 22 September, cited~~ provinces, citing potential danger to lives and property. High rainfall levels were noted in areas such as Maliboda, which recorded 104 mm, alongside high levels in Kalupahana, Maskeliya, Polpithigama, and Dammulla. These patterns were attributed to wind flow toward a low-pressure area over the Bay of Bengal. By 29 September, ~~forecasts indicated~~ heavy rainfall exceeding 50 ~~mm. Afternoon showers or thundershowers were~~ mm was expected in across the Uva, Eastern, and Central provinces. In October, a new low-pressure area developed near Sri Lanka, triggering further warnings for heavy rainfall exceeding 100 mm in parts of the Sabaragamuwa and North Western provinces, as well as ~~Polonnaruwa and Mullaittivu. Morning showers were anticipated~~ intermittent thunderstorms in ~~coastal areas of~~ the ~~Western Province and the Galle~~ Central and Matara districts. Maritime warnings included south-westerly winds of 25–35 km/h, potentially increasing to 45–50 km/h from Galle to Pottuvil via Hambantota, with very rough seas expected during thundershowers. Southern regions.

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