NBRO issued landslides warning for Galle Baddegama, Akmeemana, Elpitiya, Niyagama, Bope - Poddala and Matale Ukuwela areas.
Meanwhile, the Disaster Management Centre (DMC) announced that more rain was expected in Western, Sabaragamuwa, Central and Southern provinces.
Residents in low lying areas near several rivers have been asked to remain vigilant.
The Met Department has warned fishermen that seas off the coasts of Sri Lanka will be rough.
The Department has urged the fishing community not to go out to sea until further notice.