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Heavy rainfall alert issued for southwestern Sri Lanka

The Meteorology Department has warned of significant rainfall exceeding 100mm across several regions as moisture-laden winds continue to affect the island's southwestern areas. While a developing low-pressure system over the Bay of Bengal will not directly impact Sri Lanka, its atmospheric effects are expected to sustain wet conditions in vulnerable zones.

LSN Sri Lanka · 21 September 2026

Heavy rainfall alert issued for southwestern Sri Lanka

The Department of Meteorology has alerted residents of southwestern Sri Lanka to prepare for heavy showers, with some districts expected to receive rainfall amounts exceeding 100 millimetres over the coming days. The warning comes as a developing low-pressure area over the Andaman Sea region gathers strength, though meteorologists emphasize the system will not make a direct approach to the island.

The persistent rainy conditions affecting Sri Lanka's southwestern sector are being driven by broader atmospheric circulation patterns linked to the Bay of Bengal system. The prevailing moisture-laden winds are expected to maintain elevated rainfall activity across multiple districts, potentially leading to flooding and waterlogging in low-lying areas.

Residents in affected zones are advised to exercise caution during the period of heavy rainfall. The Department of Meteorology recommends that communities remain vigilant regarding weather updates and take necessary precautions to minimize disruption and potential damage from flooding. Further meteorological advisories are expected as the system evolves over the next 48 to 72 hours.