Not as a town, but yes as a handful of addresses. Only a sliver of the place sits in the mapped river-and-sea flood zones. About one postcode in nine flags high on at least one flood indicator, which is a different and broader measure. Exactly one property is rated high risk from rivers and sea, and it is not a home. South Molton has flooded before, and the water came from the river rather than the sky.
In the Environment Agency's river-and-sea flood zones, roughly 2% of the town's postcodes sit inside zone two and under 1% inside zone three. Those two bands do not overlap. Zone three is the higher-probability core and zone two is the medium-probability fringe sitting outside it, which is why the fringe carries the larger share. The River Mole runs through the town, and the mapped exposure follows it rather than scattering across the estates.
Surface water does not get its own published share here. It is folded into the postcode-level indicators further down, which is worth knowing before anyone reads a low zone figure as a clean bill of health. What the historical record does show is that this town's flooding has come out of the channel. Six flood events are on file, roughly 2% of postcodes fall within a recorded historic flood extent, and the most recent event dates back to January 1968, logged as the main river exceeding channel capacity with no raised defences in place.
Looking forward, the Environment Agency's climate-adjusted mapping widens the exposure to about 3% of postcodes. That is a modelled allowance for future conditions rather than a prediction about any particular winter, and the honest reading is that the strip along the river gets slightly wider rather than the town getting wetter.
For insurance, none of this makes cover difficult in general, but it makes the address the only thing that matters. A property inside the river corridor will be underwritten differently from one four streets uphill, and the difference shows up in the excess as much as the premium. Get an indicative quote for the specific address before instructing a solicitor, not after the survey comes back.
Across the postcode-level indicators, which fold surface water in alongside rivers and sea, about 12% of the town's postcodes rate high on at least one measure, around 10% rate medium and roughly 31% rate low. Those bands are a wider net than the flood zones and overlap with them, so they are not additional risk sitting on top. They are the same water, counted a different way, and the reason a buyer can find one page saying under 1% and another saying 12% without either being wrong.
Counted as homes rather than postcodes, the Environment Agency's rivers-and-sea mapping lists 188 properties carrying any risk at all, and only postcodes with some risk appear in that list in the first place. Of those, one is rated high, 85 medium and 25 low. No residential property is in the high band. Eighty-five homes at medium risk in a town this size is not nothing, and it is also not a floodplain.
On defences, about 1% of postcodes sit inside a high-probability extent with a defence present in the model, and about 1% sit inside one with nothing modelled between the water and the buildings. A further 2% or so fall in a low-probability undefended extent. Defended in this context means a structure exists in the model. It does not mean the property is protected, and it should never be read as such by anyone deciding whether to commission a search.
Sea level is a background fact rather than a local one here, since the town is inland on a river. The nearest tide gauge is at Devonport, where the record from 1962 to 2015 measures a rise of roughly 2.4 millimetres a year. That is what the instrument recorded over that period, not a forecast.
Flood risk in South Molton is middling: too concentrated to dismiss, too contained to make the town a problem. Everything depends on which side of the Mole the house sits, and that is a question about one address rather than about a town.