Lake free 24/7. Walk around ~3 km. Temple of Tooth nearby. Boats prohibited. Beautiful at sunset!
Kandy Lake is in Kandy city center. From Colombo Airport, take train to Kandy station (scenic hill route, 2.5-3 hours, from 100 LKR). Bus from Colombo (3-4 hours, from 200 LKR). Taxi from Colombo about 10000-15000 LKR. The lake has a walking path around it, takes 30-40 minutes to circle. Temple of the Tooth is nearby.
Open 24/7. Free entry. Best time to visit is early morning or late afternoon when it's less crowded.
Average temperature by month