
Udawalawe lies on the boundary of Sri Lanka’s wet and dry zones. The park has an annual rainfall of 1,500 millimetres (59 in), most of which falls during the months of October to January and March to May. The average annual temperature is about 27–28 °C (81–82 °F), while relative humidity varies from 70% to 83%.
The park is 165 kilometres (103 mi) from Colombo. Udawalawe is an important habitat for water birds and Sri Lankan elephants. Wildlife reports say there are about 500 elephants in the park and they often roam in herds of up to 100. Leopards, buffalo, deer and sloth bears keep them company along with mongooses, bandicoots, foxes, water monitor lizards and crocodiles. It is a popular tourist destination and the third most visited park in the country.