Yes, and the official plan for this coast doesn't involve holding the sea where it is. About a third of postcodes carry a high flood rating on at least one measure. Half sit within a short walk of the shore. The long-term policy for this stretch is to let the shoreline move rather than hold it. The flood question here isn't a box on the searches. It decides which house you buy.
This page covers Eastchurch together with Warden and Leysdown-on-Sea, which share one ward on the Isle of Sheppey. On the Environment Agency's river-and-sea flood map, 8% of the area's postcodes fall in Flood Zone 3, the highest-probability band, and a further 2% sit in Flood Zone 2, the medium-probability fringe beyond it. The two bands don't overlap, so Zone 2 being the smaller figure is not a mistake. The area has 16 recorded flood events, and the most recent was in January 1978, when the sea came over the defences.
No separate surface-water figure exists for this area. Rain that can't drain away is folded into the postcode indicators further down, rather than reported as a share of its own.
The forward look is less comfortable. With the Environment Agency's climate-change allowance applied, the share of postcodes inside the river-and-sea flood zones rises to 20%. That's a modelled future, not a forecast for any one street, but it points one way.
For insurance, the practical point is simple: a postcode with a flood history or a high modelled risk tends to be quoted differently, and some homes are harder to cover than the particulars suggest. Get an indicative buildings quote on the exact address before you instruct a solicitor, not after you've fallen for the garden. Selling agents are quite capable of describing a flood-zone bungalow as "close to the water". Both descriptions are accurate.
Folding surface water in with rivers and sea, 30% of postcodes rate high on at least one flood measure, 25% medium and 38% low. Those bands overlap with the flood-zone figures above, because they count any measure that trips the rating. They are a different yardstick and shouldn't be added to the zone shares.
Counted by building rather than postcode, the Environment Agency's rivers-and-sea mapping lists 3,161 properties across the 47 postcodes that carry some risk. Of those, 1,305 are at high risk, 475 at medium risk, 29 at low risk and 120 at very low risk, and 566 of the high-risk properties are homes. Postcodes carrying no risk at all don't appear in that list, which is why the total is smaller than the whole area.
Whether anything stands between the water and the house is the next question. In the Environment Agency's modelling, 8% of postcodes sit in the high-risk extent with no defence modelled, and 2% sit in it with a defence present in the model. "Defended" means a defence exists in the model. It doesn't mean the house stays dry, and 1978 is the local reminder of what happens when a defence is overtopped. The Lower Medway Internal Drainage Board covers 99% of postcodes, so the ditches and pumps that keep the low ground workable are someone's full-time job.
The sea is close. About half the postcodes lie within 500 metres of the coast, the median postcode is about 510 metres from it, and the nearest is 29 metres away. The 500-metre line is a threshold, not a statement about any single address, but it gives a sense of how much of the area has the sea as a neighbour.
The shoreline management plan for this stretch sets managed realignment as the policy over 20 years, 50 years and 100 years. That means letting the coastline shift in a controlled way rather than holding it where it is. A policy is a stated intention, not a guarantee and not a wall that already exists, so it's worth reading the policy for your exact frontage before you commit. It's a planning document. It isn't a promise to your front door.
At Dover, the nearest tide gauge, sea level rose by about 2.2 millimetres a year over the record from 1961 to 2010. That's a measured historic rate, not a projection.
Flood risk is Eastchurch's weakest point, and a serious one. Pick the address on higher ground first and the house second, and get the insurance quote before you get attached.