 Wedmore is situated on raised ground, in the Somerset Levels between the River Axe and River Brue, often called the Isle of Wedmore, which is composed of Blue Lias and marl.South of Wedmore are the Tealham and Tadham Moors, a biological Site of Special Scientific Interest which form part of the extensive grazing marsh and ditch systems of the Somerset Levels and Moors.The water table is high throughout the greater part of the year with winter flooding occurring annually, by over-topping of the River Brue.