Yes, in the places you would expect, and the map is unusually honest about which ones. About one in nine postcodes sits in the highest river and sea flood zone. Around a third carry some flood indicator. The Exe picks up the Creedy just upstream of the city and then spreads out across a plain. This is not a nasty surprise buried in a search result. It is the reason the city is where it is.
On the Environment Agency's river and sea mapping, roughly 11% of Exeter's postcodes fall inside flood zone 3, the highest-probability band, and about 3% sit in zone 2. Those two are exclusive bands rather than nested ones. Zone 2 is the additional medium-probability fringe lying beyond zone 3, which is why it is the smaller of the two numbers here and not an error in the dataset. Roughly 14% of postcodes have a recorded historic flood, and 1,830 flood events are on record for the area, the most recent of them logged in 2001 with the sea as the source.
Surface water is the risk that never appears on a flood zone map, because those zones only describe rivers and the sea. A road that ponds, a Victorian drain that backs up in a summer downpour, a street on a ridge that turns into a watercourse for twenty minutes: none of that shows up in the zone figures at all. It is folded into the postcode-level indicators further down, and it is a large part of why those numbers run higher than the zone ones.
Looking forward, the Environment Agency's climate-adjusted mapping puts about 13% of postcodes inside the flood zones once climate allowances are applied, against roughly 11% in zone 3 today. That is a modest widening rather than a redrawing of the city, but it moves in one direction.
For insurance, a property inside a mapped flood extent is a different conversation with an underwriter than one outside it, and the difference shows up in the excess as much as the premium. The sensible order is to get an indicative quote before instructing a solicitor rather than after, and to ask the seller directly whether the property has ever been claimed on. A vendor who has never had water in the house will say so quickly.
At postcode level, and counting a postcode if it rates on at least one measure including surface water, about 11% of Exeter postcodes come out high, roughly 13% medium and around 33% low. Those bands overlap with the zone figures rather than adding to them, so a postcode can appear in both. Read them as two views of the same city, not two separate problems.
The count of homes is the more useful number. Across the postcodes carrying any risk at all from rivers and the sea, and only those postcodes appear in the count, the Environment Agency's mapping identifies 199 properties at high risk, 994 at medium and 8,060 at low, out of 11,238 properties in total. Of the high-risk ones, 136 are residential.
Whether anything stands between the water and the building is the question most flood summaries skip. About 11% of postcodes sit inside a modelled high-probability extent with no defence present in the model, against roughly 2% where a defence is present. Defended, in this context, means a structure exists in the model at that location. It does not mean the house behind it stays dry, and it should not be read as reassurance.
The coast matters less than the river for most of the city. Around 3% of postcodes lie within 500 metres of the coast, which is a threshold the dataset defines rather than a statement about any particular address, and the median postcode sits roughly 2,800 metres from the water. The closest point comes in at 9 metres. Every postcode here is covered by a shoreline management plan, and the modal policy is hold the line across the twenty, fifty and hundred year horizons. That is a stated intention to maintain defences, not a promise, and not evidence that a defence exists where you are standing.
At the nearest tide gauge, Devonport, the measured record from 1962 to 2015 shows sea level rising at about 2.35 millimetres a year. That is a historic rate over that record rather than a forecast.
Exeter's flood risk lands in the middle: genuinely present, well mapped, and concentrated in the low ground rather than smeared across the city. Buy on the postcode and the survey rather than on the city-wide percentage, because the city-wide percentage will never be the one that floods your kitchen.