Netley's flood risk sits at the water's edge, not across the village. Almost none of it lies in the river-and-sea flood zones. About a dozen homes carry a high risk from rivers and the sea. One postcode in ten has a high rating on some flood measure. The risk is real, but it belongs to particular streets and not to the whole village.
In the Environment Agency's river-and-sea flood zones, about 1% of Netley's postcodes fall in Zone 2 and none fall in Zone 3. The two zones are separate bands. Zone 3 is the highest-probability land, and Zone 2 is the medium-probability fringe beyond it, so a small Zone 2 figure and an empty Zone 3 are consistent with each other. On this measure, Netley has very little exposure.
There is no standalone surface-water figure for Netley. Surface water is instead folded into the postcode-level measure below, which is why that measure comes out higher than the flood zones. Rain that has nowhere to go does not care whether the sea is a mile away.
Looking forward, the Environment Agency's climate-adjusted flood zone covers about 3% of the area. That is a modelled allowance for a wetter future rather than a forecast for any particular house. It is also a larger footprint than today's zones.
Insurers price by address, not by village, so the homes on the wrong side of these lines can face higher premiums or narrower cover, while most of Netley should find flood cover unremarkable. The only way to know which applies is to get a quote on the exact property before paying for surveys and searches.
On the wider postcode measure, which counts a postcode if it rates on at least one flood indicator including surface water, about 10% of postcodes rate high, 4% medium and 21% low. These bands overlap with the flood-zone figures and measure something broader, so they should not be added to them or treated as the same thing. A high rating on one measure is enough to put a postcode in the high group.
Counting homes rather than postcodes gives a clearer answer. The Environment Agency's rivers-and-sea mapping lists five Netley postcodes carrying some risk, covering 142 properties. Of those, 12 are at high risk, all of them homes, none at medium, 15 at low and 2 at very low. Postcodes with no risk do not appear at all, so the rest of the village is simply absent from this list.
On defences, the modelled extents show no postcodes inside a high-risk area, defended or undefended, and about 1% inside a low-risk extent without a defence in the model. "Defended" in this mapping only means a defence appears in the model. It says nothing about whether that defence would hold for a particular house, and it is not a promise of dry carpets.
The coast is close for a large part of the village. About 40% of postcodes are within 500 metres of the shoreline, the nearest sits about 15 metres from it, and the median postcode is about 640 metres away. The 500-metre mark is a threshold, not a statement about any single front door.
The shoreline management plan for this stretch is to hold the line over the next 20 and 50 years, then move to no active intervention on the 100-year horizon. Holding the line is a stated intention to maintain defences, not a guarantee and not a wall that already exists. No active intervention means the plan does not commit to defending the shore at all over the longer term, which matters to anyone buying a home they expect to pass on.
The nearest tide gauge, at Portsmouth, recorded sea levels rising by about 2 millimetres a year across its record from 1962 to 2023. That is a measured historic rate, not a prediction.
No historic flooding is recorded within the area. That is reassuring, since flooding tends to leave a trace in the records, but an empty record is not proof that it has never happened.
Netley's flood risk is middling: low for most of the village, concentrated in a handful of shoreline properties, and pushed up by surface water and a long-term shoreline policy that stops short of a promise. Before offering, check the exact address, get an insurance quote, and read the shoreline plan if you are buying for the long haul.