About 200m downstream of the National Trust property are 2 pools. The upper one is small but deep beneath a small waterfall and when I was there people were jumping in from the outcrop of rock on the same bank as the house. The second pool is 20m downstream, best accessed from the opposite bank it is 10m long and in places over 2m deep.
To the best of my knowledge there are no other swimming places, though there are a few wallows, downstream to the sea.
This is a crowd-sourced map. Abilities vary, and conditions change. Always assess risks for yourself before getting in.
Take care if jumping