Wood was sent to New College School in 1641, and at the age of twelve was removed to the free Lord Williams's School at Thame, where his studies were interrupted by Civil War skirmishes. He was then placed under the tuition of his brother Edward (1627–1655), of Trinity College, and, as he tells us, "while he continued in this condition his mother would alwaies be soliciting him to be an apprentice which he could never endure to heare of". He was entered at Merton College in 1647, and made postmaster, a type of scholar at Merton.