Yes, though not from where most buyers expect. The sea barely registers. The rivers barely register. Rain with nowhere to go is the real exposure. Herne's flood risk comes down the road, not up the beach.
On the Environment Agency's river-and-sea mapping, about 1% of Herne's postcodes fall in flood zone 3, the highest-probability band, and none fall in zone 2, the medium-probability fringe beyond it. By that measure alone, Herne looks close to untouched. That measure is also the one estate agents like to quote, which is reason enough to keep reading.
Surface water is where the picture changes. When heavy rain overwhelms drains and runs across hard ground, it floods homes that sit nowhere near a river or the coast. The river-and-sea zones do not count it, which is why a postcode can sit outside every flood zone and still carry a flood warning on the wider indicators below.
Looking forward, the Environment Agency's climate-adjusted flood zone covers about 1% of postcodes, the same small footprint as today's zone 3. On rivers and sea, the future looks much like the present.
Insurers do not price on the flood-zone headline alone. They look at the exact address, including surface-water exposure, and a home that looks clear on the river-and-sea map can still come back with a higher premium or an excess that makes you wince. Get an indicative quote on the specific property before paying for a survey, not once the removal van is booked.
Across Herne's postcodes, about 18% rate high on at least one flood measure, 22% rate medium on at least one, and 46% rate low on at least one. Those measures fold surface water in alongside rivers and sea, and the bands overlap with each other and with the zone figures above, so they cannot be added together. The difference between 1% in the river-and-sea zones and 18% rating high on at least one measure is the whole story of flooding in Herne.
Counted as properties rather than postcodes, the Environment Agency's rivers-and-sea mapping lists 119 properties in the five postcodes that carry any such risk. Of those, four are at high risk, two of them residential, nine at medium risk and ten at low risk. Postcodes with no river-or-sea risk do not appear in that count at all, so it describes the handful of exposed spots, not the village as a whole.
On whether anything stands between the water and the house, about 1% of postcodes sit inside the high-risk extent with defences removed from the model, and about 1% with defences included. A defence being present in the model means something is there. It does not mean the property behind it is safe, and it says nothing about surface water, which defences are not built to stop.
The shoreline management plan for this stretch of coast sets a policy of holding the line over 20, 50 and 100 years, meaning the stated intention is to maintain the existing defences across all three horizons. A policy is an intention written down by public bodies, not a wall already standing, and intentions depend on future funding. With the nearest coast about 1.9 kilometres away on the median postcode, the sea is a background issue for Herne rather than a front-line one.
The nearest tide gauge, at Dover, recorded sea level rising by about 2.2 millimetres a year over its record from 1961 to 2010. That is a measured historic rate, not a forecast, and it matters more to the coast than to a village set back from it.
No recorded historic flooding appears in Herne's area. That is reassuring as far as it goes, since it means no flood has made it into the official record here. It is not proof that water has never come through a front door, and surface water in particular often goes unrecorded.
Flood risk is Herne's weakest point, and it hides behind a clean river-and-sea map. Buyers who check the surface-water picture for the exact address will be fine; buyers who stop at the flood zone are the ones who find out in February.