Prevailing weather in the month of May 2012 in Sri Lanka is very warm and humid with the ending of inter-monsoon at the start of the month. The weather in Sri Lanka is very warm and humid during the daytime as well as night and it will not be changed for another two weeks as per the med department. The oppressive heat is making very discomfort, especially in the cities. But the heat is a bit relieved in the remote areas due to the substantial green cover.
According to the met department, the prevailing warm weather will be ended soon with the beginning of South-West monsoon. The south-west monsoon will be in full force within next two weeks and met department forecast heavy rains during the monsoon. South-West monsoon brings the highest rainfall to the island. The rain accompanies the lightning and strong winds making some destruction in several areas in the island. Coastal areas are subjected to be eroded during the monsoon and trees are uprooted due to the strong wind. Some areas come under water while heavy rains pour large amount of water within a short period of time.
People who are living in mountains are advised be cautions against the earth slips. Disaster management centre of Sri Lanka is kept on alert to meet any kind of situation. The sea off the west and south coast will be rough for most time of the day. Underwater current and strong waves make it unsuitable for swimming in the water of this area.
The fishing communities of the west coast are moving to the east coast during the South-west monsoon while it is not safe to carry on their fishing activities. With the beginning of South-West monsoon, the met department expects the temperature to be reduced to a comfortable level.
Monsoon is a seasonal wind with six months changing the pattern. During the South-West monsoon, the wind is entering the country from South-West part of the island and it comes from the Indian Ocean. This wind contains a large amount of water while it sweeps the ocean. When the North-East monsoon breaks into the island it comes from the Indian subcontinent and contains a low volume of water compared to the South-West monsoon. Therefore the area that depends on North-East monsoon for rain stays dry for the most part of the year. The areas such as Jaffna, Trincomalee, Anuradhapura, and Polonnaruwa are coming under the radar of North-East monsoon where the rainfall is substantially low compared to South-West part of the country.
Sri Lanka being a tropical island is favourable for travelling throughout the year due to a warm climate. But for most Europeans November to April is the best period for holiday in Sri Lanka. One important reason is these six months brings heavy rain to South-West region, where the most of the beach resorts are to be found.