Vavuni Kulam (Tamil: வவுனி குளம் Vavuṉi Kuḷam) is an irrigation tank in northern Sri Lanka, approximately 2 mi (3 km) south east of Mallavi.

The tank on Pali Aru was earlier knowns as Peli Vapi.^[2] Restoration of the tank, which had a catchment area of 88 sq mi (228 km²), commenced in 1954 with the support of the Australian government.^[2]

By the late 1960s the tank's bund was 2 mi (3 km) long and 24 ft (7 m) high whilst the tank's storage capacity was 35,300 acre⋅ft (43,541,909 m³) and its water spread area was 3,150 acres (1,275 ha).^[2] There was a 500 ft (152 m) spill on the left bank and two spills on the right bank - 1,200 ft (366 m) and 700 ft (213 m).^[2] The left and right bank sluices were each 4 ft by 3 ft 6 in whilst the central sluice had a diameter of 18 in.^[2] By 2014 the tank was capable of irrigating 6,900 acres (2,792 ha).^[1]