David Amos was hospitalised after rocks were hurled at him, leaving him bloodied and with injuries to his head on Wednesday.
The 66-year-old volunteer had to be evacuated from the area as he was rushed to hospital where he received five stitches.
Mr Amos was with two other British women at the time when he heard gunshots from a group of Israeli settlers approaching Palestinian farmland near the village of Burin.
He told The Independent there were eight or nine men, all of whom were masked and were carrying large rocks.
He said the settlers fired gunshots as they approached, adding: ''They were shouting at us 'go' in English and also shouting in Hebrew.
''A man stood no more than four feet from me and threw this rock which hit me on the back of the head. I was sitting upright and I fell over on my side and then he and two others kicked me.
''The women were shouting 'we are British' so they knew we were British before the rock was thrown.''
Mr Amos said the settlers then set fire to trees and undergrowth as he and the other volunteers escaped. Stone throwing in the same incident also reportedly wounded a Palestinian farmer.
Mr Amos was volunteering with the Olive Harvest Trust, which works to protect Palestinian olive farmers.
Tensions in the area are at breaking point. In the past two weeks lone-wolf attacks have seen eight Israelis killed and dozens injured, while at least 28 Palestinians have been killed by Israelis.
This week, a Palestinian student set himself on fire when he threw a Molotov cocktail towards Israeli police during clashes with police in the West Bank.