Highlights

Rainfall Prediction: From 30th Dec 2025 -05th Jan 2026, fairly heavy rainfall (55-75 mm) is predicted for the Northern Plains ; light to moderate rainfall (05-55 mm) is predicted for the Western Plains and Hills, Eastern Plains and Hills and Southern plains. From 06th – 12th Jan , the rainfall shall increase further, with a similar spatial pattern.

Monitored Rainfall: During 23rd – 29th December, the average rainfall across Sri Lanka totalled 11 mm. There was moderate rainfall across the Eastern plains especially in Batticaloa with a maximum of 44 mm on 28th December.

Monitored and Predicted Wind: From 22nd -28th Dec, winds at 1.5 km height were mostly from the northeast at speeds ranging 3-5 m/s. From 31st Dec 2025-06th Jan 2026, wind speeds are predicted to be in the range of 3-6 m/s coming from the North East.

Monitored Sea and Land Temperature: Sri Lanka recorded seasonable temp across its regions. The Southern plains were the warmest, with maximum temp of 32.2°C, while the Eastern Hills recorded the lowest minimum temperature of 24.2 °C. The sea surface temperature around Northern, Eastern and Southern coasts, was below average, ranging between -1°C and 0.25°C.