Showers above 100 mm are likely at some places in the Western, Sabaragamuwa, Central, North-western, Northern and Southern provinces and in Anuradhapura district.

On 21 October 2026, the Department of Meteorology issued a weather forecast predicting potential heavy rainfall in various regions of Sri Lanka. A low-level atmospheric disturbance near the island is expected to develop into a low-pressure area within the next 24 hours. This system will influence increased rainfall across the island and surrounding sea areas over the following days.

The public, alongside naval and fishing communities, are advised to remain vigilant and heed future forecasts and bulletins from the Department of Meteorology. Misty conditions may be experienced in the Central and Uva provinces early in the morning. Overall, most parts of the island can expect cloudy skies and showers, with the possibility of thundershowers.

The Department specifically advises that heavy showers measuring more than 100 mm are likely to occur in the Western, Sabaragamuwa, Central, North-western, Northern, and Southern provinces, as well as in Anuradhapura district. Residents in these areas are urged to take necessary precautions to mitigate potential damage caused by brief, intense winds and lightning during thundershowers.