This is due to a low pressure area that had existed east of the central Bay of Bengal transforming into a cyclone and moving away from the island.
On its effect, the skies will be cloudy and rains accompanied by strong winds are expected, said duty meteorologist Buddhika Bandularatne, adding that sea area around the island too, would be windy.
The inclement weather related incidents have so far claimed 158 lives and 108 are missing.
Furthermore, 464,477 people in 14 districts have been affected.
The National Building Research Organization has issued a landslide warning for Ratnapura, Kegalle, Nuwara Eliya, Hambantota, Matara, Galle and Kalutara districts.
It advises people to immediately vacate landslide prone areas if rains persist.