Heavy showers of about 75mm are likely at some places in the Central, Sabaragamuwa and Uva Provinces and in most provinces of the island after 1 p.m., the forecasting division of the National Meteorological Centre said.
They said showers may occur in the Western, Southern and Eastern Provinces during the morning.
Misty conditions expected at some places in the Central, Sabaragamuwa and Uva Provinces during the morning.
The public is requested to take adequate precautions to minimize damages caused by temporary localized strong winds and lightning during thundershowers.