Yes, and it is the one genuine problem with the place. About a third of postcodes carry a high rating on at least one flood measure. Half fall inside the climate-adjusted zone. Nearly half sit within a marsh drainage board's area. The ground is flat, low and drained, which is exactly why the houses are there and exactly why the mapping keeps colouring them in.
Start with rivers and sea. In the Environment Agency's flood zones, about 9% of the area's postcodes fall inside zone 3, the highest-probability band, and none fall inside zone 2. Zone 2 is the additional medium-probability fringe sitting beyond zone 3, so a smaller number there is not a reprieve. It means the risk is concentrated in the high band rather than tailing off into a wider margin.
Surface water is not reported as its own separate share in the mapping used here. It sits folded into the postcode-level indicators further down, so anyone looking for a standalone surface-water percentage will not find one on this page and should not accept one invented elsewhere. What the area does have is drainage as a permanent feature of local government: about 47% of postcodes lie inside the Braunton Marsh Drainage Board area, which exists because keeping this ground usable requires someone to be responsible for the water.
Looking forward, about 51% of postcodes fall inside the climate-adjusted flood zone, the version of the map drawn with allowance for future sea level and rainfall. That is a modelled outlook rather than a forecast of any particular decade, and it is the figure a lender or an insurer is most likely to be looking at in twenty years.
For insurance, this is the kind of profile where cover is usually obtainable and the terms are the negotiation. Excesses on flood claims, the questions on the proposal form and whether a previous owner has ever claimed all matter more here than they would inland. Get an indicative quote for the specific address before instructing anyone, because the premium is the market's honest opinion of the map.
On the postcode-level indicators, which fold surface water in alongside rivers and sea, about 32% of postcodes rate high on at least one measure, 27% medium and 51% low. Those bands overlap with the zone figures above rather than adding to them, since a postcode can appear in both. About 2% sit inside recorded historic flood extents.
Counted as homes rather than postcodes, the Environment Agency's rivers-and-sea mapping puts 46 properties at high risk, 58 at medium and 37 at low, out of 555 properties across the postcodes that carry any risk at all. Of the high-risk properties, 38 are residential. Postcodes with no risk do not appear in that total, so this is the affected slice of the area rather than the whole of it.
Defences are where the map gets uncomfortable. The high-risk modelled extent covers about 9% of postcodes with a defence present in the model, and about 9% with no defence in the model. The footprint does not shrink when the defence is included. Defended in this context means a structure exists in the modelling, not that a house behind it is safe.
The water is close. About 30% of postcodes sit within 500 metres of the coast, the nearest is about 70 metres from it, and the median across the area is roughly 630 metres. Every postcode here is covered by a shoreline management plan, and the stated policy is to hold the line over the next twenty years, shifting to managed realignment on the fifty-year horizon before returning to hold the line at a hundred. A policy is an intention to maintain defences over that period. It is not a defence that already exists, and it is not a promise.
At the nearest tide gauge, Devonport, sea level rose by about 2.4 millimetres a year across the record from 1962 to 2015. That is a measured historic rate rather than a projection.
Flooding is the weakest thing about Chivenor and Wrafton by a distance, and no amount of estuary view offsets it. Anyone buying here needs the address-specific search, the insurance quote and the survey before the offer, not after.