It lies almost wholly within Frensham, Surrey, a nucleated village on alluvial soil narrowly buffered to the north-west, connected by a path.
The common supports few streams due to the permeability of the soil, although the ground to the south-east, called the Flashes, is boggy.
[1] The site supports several protected species, including sand lizard, smooth snake, woodlark, Dartford warbler and nightjar.
Once detected by the Environment Agency, the National Trust warns visitors to avoid entering the pond water.
[9] During hot weather in 2018 large numbers of visitors flocked to Frensham Common, particularly Frensham Great Pond, causing an anti-social parking problem with cars parked on rural clearways, double yellow lines and also leaving behind large amounts of rubbish.
North west of the common border is the small village of Frensham, which adjoins two hamlets further across the River Wey.