Highlights

Rainfall Prediction: From 13th -19th Jan 2026, moderate rainfall (25-35 mm) is predicted for the  Southern Plains and Eastern Plains; light to moderate (0-25 mm) is predicted for the Western Plains and Hills, Eastern Hills and Northern plains. From 13th  – 19th Jan , the rainfall shall decrease across SL compared to the first week of Jan

Monitored Rainfall: During 7th – 13th January, the average rainfall across Sri Lanka totaled 39 mm. There was heavy rainfall across the Eastern, Northern and Western Plains, especially in Mullaitivu with a maximum of 64 mm on 9th January. This is mainly due to the storm formed in the Bay of Bengal and moved towards the eastern and northern coasts of SL.

Monitored and Predicted Wind: From 5th – 11th Jan 2026, winds at 1.5 km height were mostly from the east at speeds ranging 10-15 m/s. From 14th-20th Jan 2026, wind speeds are predicted to be in the range of 1-10 m/s coming from the North East. Wind speeds are expected to be lower compared to the previous week.

Monitored Sea and Land Temperature: Seasonable temperature was recorded, which is the lowest during Dec – Jan. The Southern plains had the maximum temp of 30.4°C, while the Eastern Hills had the minimum temperature of 22.4 °C. The sea surface temperature around Northern, Eastern and Southern coasts, was below average, ranging between (-1°C) – (-0.25°C).