The Department of Meteorology says the South-west monsoon condition is gradually establishing over the island.
The Met Department predicts thundershowers to occur at times in Western, Sabaragamuwa, Central and North-Western provinces and in Galle and Matara Districts.
It said heavy showers about 100mm will occur at some areas in the Western and Sabaragamuwa provinces and in the Kandy, Nuwara-Eliya, Galle and Matara districts.
Several spells of showers are also expected in the Northern Province and in Anuradhapura and Hambantota Districts.
The Met Department said strong winds of approximately 40-50kmph can be expected at times over the western slope of the central hills, Northern, North-Central and North-Western provinces and in the Hambantota district.
It warned the public to take adequate precautions to minimize damages caused by temporary localized strong winds and lightning during thundershowers.
