Sri Lanka is expected to experience enhanced rainy weather from the evening of Tuesday, 20 October 2026, due to the development of an atmospheric disturbance in the lower atmosphere near the island, warns of heavy rainfall in several provinces, along with thunderstorms, lightning and strong winds.
Showers or thundershowers are expected in most parts of the island after 1.00 p.m. Fairly heavy rainfall exceeding 75 mm is likely at some locations in the Northern, North Central, Central and Uva provinces. The Trincomalee District may also experience significant rainfall.
Morning showers are possible in coastal areas of the Western and Northern provinces and in the Puttalam District. Misty conditions may develop in some areas of the Western, Sabaragamuwa, Central and Uva provinces during the early morning hours.
The public is advised to take adequate precautions against temporary localized strong winds and lightning during thundershowers. Residents in areas expecting heavy rainfall should remain alert to changing weather conditions and follow official safety advice.
SEA AREA FORECAST
In the sea areas around Sri Lanka, showers or thundershowers are expected at several locations during the next 24 hours. Southwesterly winds will prevail at speeds of 25 to 35 kmph. Wind speeds may occasionally increase to 45–50 kmph in sea areas extending from Chilaw to Kankasanthurai via Puttalam.
These sea areas may become fairly rough at times, while other sea areas around the island are expected to remain slight under the forecast conditions. However, temporarily strong gusty winds of 60–70 kmph and very rough seas may occur during thundershowers.
Fishermen, naval personnel and others engaged in maritime activities are urged to exercise caution, particularly when thunderstorms develop. The public is encouraged to monitor weather updates from the Department of Meteorology and take necessary safety measures as the unsettled weather pattern strengthens across the island from Tuesday evening.
