Beira Lake Beira Lake Location in Colombo District Show map of Colombo District Beira Lake Location in Colombo District Show map of Sri Lanka Location Colombo Coordinates 6°55′45.9624″N 79°51′15.0552″E﻿ / ﻿6.929434000°N 79.854182000°E﻿ / 6.929434000; 79.854182000Coordinates: 6°55′45.9624″N 79°51′15.0552″E﻿ / ﻿6.929434000°N 79.854182000°E﻿ / 6.929434000; 79.854182000 Type Reservoir Primary outflows To the Indian Ocean Basin countries Sri Lanka Surface area 65 ha (160 acres)