Ablation Lake is a proglacial tidal lake in Ablation Valley, Alexander Island, Antarctica, with stratified saline and fresh water and depths exceeding 117 m (384 ft).

It is named after Ablation Valley following British Antarctic Survey (BAS) limnological research from 1973.

The site lies within Antarctic Specially Protected Area (ASPA) No.147.

[1] The lake has a sub-ice channel connecting it to George VI Sound, and is approximately 500 metres (1,600 ft) below the surface of the ice.

[2] This article incorporates public domain material from "Ablation Lake".