He succeeded his father as Earl of Castlehaven on 2 November 1686.
He married Anne Pelson, daughter of Richard Pelson and his wife, née Anne Villiers, daughter of Christopher Villiers, 1st Earl of Anglesey.
They had one son, James, who succeeded him as Earl of Castlehaven.
He died of apoplexy.
{| border="2" align="center"
|-
|width="30%" align="center"|Preceded by:
Mervyn Tuchet
|width="40%" align="center"|Earl of Castlehaven
|width="30%" align="center"|Followed by:
James Tuchet
|}