Rydal Water is a small body of water in the central part of the English Lake District, in the county of Cumbria. It is located near the hamlet of Rydal, between Grasmere and Ambleside in the Rothay Valley.The lake is 1,290 yards (1.18 km) long and varies in width up to a maximum of 380 yards (350m), covering an area of 0.12 mi² (0.31 km²).