Marine Weather Forecast for Sri Lanka: Rough Seas and Thundershowers Expected Over Next 24 Hours
Issued at 05.30 a.m. on 23 December 2025
The Department of Meteorology has issued a marine weather advisory for sea areas around Sri Lanka, warning of rough sea conditions, strong winds, and possible thundershowers during the next 24 hours.
Light showers are expected in the sea areas off the coast extending from Trincomalee to Pottuvil via Batticaloa. In addition, showers or thundershowers may occur at a few locations in the sea areas from Balapitiya to Matara via Galle, particularly during the evening or night.
Winds across the surrounding sea areas will be north-easterly to northerly, with average wind speeds of 25–35 kmph. However, wind speeds may increase up to 50 kmph at times, especially in the sea areas from Balapitiya to Mannar via Colombo and Puttalam, and from Matara to Pottuvil via Hambantota.
Due to these conditions, the sea areas off the coast extending from Balapitiya to Mannar via Colombo and Puttalam, as well as from Matara to Pottuvil via Hambantota, are expected to be rough at times. Other sea areas around the island will remain moderate.
The Department of Meteorology also cautions that temporarily strong gusty winds and very rough seas may occur during thundershowers. Fishermen and naval communities are urged to exercise caution and stay alert to updated advisories.
