Weston's brother Jerome Weston, 2nd Earl of Portland was Governor of the Isle of Wight and in April 1640, Weston was elected Member of Parliament for Newtown in the Short Parliament. He was re-elected MP for Newtown in November 1640 for the Long Parliament. At the start of the Civil War, Weston was involved in the royalist defence of Portsmouth, and as a result of his actions was disabled for sitting in parliament in 1642.
Weston was unmarried. He died at the age of 45.
- Cracrofts Peerage - Earl of Portland
- Willis, Browne (1750). Notitia Parliamentaria, Part II: A Series or Lists of the Representatives in the several Parliaments held from the Reformation 1541, to the Restoration 1660 .... London. pp. 229–239.
- George Nelson Godwin, The Civil War in Hampshire (1642-45) and the story of Basing House Chapter II - The Siege and surrender of Portsmouth
|Parliament of England|
Parliament suspended since 1629
|Member of Parliament for Newtown
With: Sir John Meux, 1st Baronet
Sir John Barrington, 3rd Baronet
Sir John Meux, 1st Baronet