The village is on the outside of a meander in the River Thames, on slightly higher ground than the flood plain around it. The river navigation follows Clifton cut, not the meander. About to the east, across the river, is the Roman town of Dorcic - now Dorchester-on-Thames. To the south-east are neighbouring Little Wittenham which has a much smaller population but much larger area and within which parish is Wittenham Clumps, also called the Sinodun Hills.