The maximum temperature in Dehiwala-Mount Lavinia is on average 30°C over the year, with values generally ranging between 29°C in August and 32°C in March. The climate is very wet, with about 4,688 mm of precipitation per year. The monthly minimum is 108 mm in February and the maximum reaches 683 mm in May.
The climate is suitable for a trip to Dehiwala-Mount Lavinia in: January, February, March, April, September, November and December. Nevertheless, the months when the weather is really pleasant are January, February and March.
For swimming, the most favorable period for water temperature is March, April, May and November, with a water temperature above 28.7°C.
However, the best time to fully enjoy the beach and swimming is January, February, March, November and December.
Water sports are particularly favorable in: January, February, March, November and December. For scuba diving and snorkeling, the best months are January, February, March, November and December.
In terms of crowd levels, the quietest periods are in May and June, while crowding is high in January, February, August and December.
