Given its coastal location, it is a no-brainer that winters are the best time to visit Negombo. Thus, the months through November to February are an ideal time to visit Negombo. Even then, the weather is still ought to be a little dry, but not as much as the other months of the year. Also, owing to the fact there is Christmas and ester happening around these months, it is also a fun time to visit here.
Summer: March to June is summer in Negombo. Sharing similarities with the south -Indian weather, Negombo pretty much experiences same climatic conditions. The average highest and lowest temperature is around 31 degrees Celsius and 23 degrees Celsius.
Monsoon: Featuring a tropical rainforest climate, Negombo experience rainfall from the months of July to September. The Southwestern monsoon winds are the main source of rainfall in Negombo. The average highest and lowest temperature is around 29 degrees Celsius and 25 degrees Celsius, while average precipitation is 130 mm.
Winter: October to February may be considered winter months, only because it is not raining then and a few degrees cooler than the summer. But nothing cool about the winters here. The average highest and lowest temperature is around 30 degrees Celsius and 21 degrees Celsius respectively.