It is only 300m from the small bay to the rock but the tide rushes through the channel and you have to be a competant swimmer with calm conditions at the slack water in the tide for this.
Or it is a great swim from Hope's Nose to Meadfoot via the rock, get the right tide current to be carried along. It's 1.3 miles.
This is a crowd-sourced map. Abilities vary, and conditions change. Always assess risks for yourself before getting in.