Yes, in parts, and the maps disagree about which parts. The formal river and sea flood zones put almost nothing here inside them. The property-level risk mapping puts 53 homes at high risk. Every postcode in the village sits within 500 metres of the sea. Flood risk in Port Isaac is an address question rather than a village question, and the village average will mislead you in both directions.
Start with the flood zones. On the Environment Agency's river-and-sea mapping, about 3% of postcodes here fall in flood zone 2, the additional medium-probability fringe, and none fall in flood zone 3, the higher-probability core. Those two bands are separate rather than nested, so a small zone 2 figure sitting alongside an empty zone 3 is exactly what the mapping is meant to show. On that measure alone, this is a low-risk village.
Surface water is where that reassurance thins out. The data used here carries no standalone surface-water rating for Port Isaac, because the surface-water signal is folded into a combined postcode indicator rather than published separately. That matters more than it sounds. Surface water is the mechanism that catches out buyers who checked one map, saw a clean result, and stopped looking.
The forward-looking version of the zone mapping, which adds a climate change allowance, still puts about 3% of postcodes in scope. That figure does not grow under the allowance, which is genuinely good news for the river and sea element and says nothing at all about rainfall landing on the village itself.
For insurance, the practical consequence is that this is a place where cover must be priced address by address, before contracts rather than after. An indicative quote for the specific property, obtained before instructing a solicitor, is the cheapest hour anyone spends in this market. Sellers whose homes sit in the clear will hand over the paperwork happily. The ones who change the subject have told you something.
Take the combined view and the numbers get uncomfortable. On at least one flood indicator, including surface water, about 24% of postcodes here rate high, about 21% rate medium and about 41% rate low. Those bands overlap with the zone figures rather than adding to them, so they are a second lens on the same village and not a second helping of risk. It is still the case that roughly a quarter of postcodes carry a high rating on something.
The property counts sharpen it further. The Environment Agency's rivers-and-sea risk mapping lists five postcodes here as carrying any risk at all, covering 202 properties. Within those, 53 properties sit at high risk, 2 at medium and 9 at low, and 21 of the high-risk properties are residential. Only postcodes with some risk appear in that count, so this is the exposed end of the village described precisely, not the whole place.
On defences, no postcodes here sit inside a modelled high-probability flood extent at all, whether defended or undefended, and about 3% sit inside a low-probability undefended extent. Worth being clear about the vocabulary: defended in these models means a defence exists in the model, not that the house behind it is safe.
The coast is the constant. All postcodes lie within 500 metres of the sea, which is a threshold the data defines rather than a claim about any single front door. The median distance is about 125 metres, and the closest postcode sits roughly 17 metres from the water. The shoreline management policy across the twenty, fifty and hundred year horizons is hold the line, meaning a stated intention to maintain defences over that period. An intention is not a guarantee, and it is not a wall.
Sea level at the nearest gauge, at Devonport, rose about 2.35 millimetres a year across a record running from 1962 to 2015. That is a measured historic rate over half a century, not a forecast for this harbour.
No historic flooding is recorded across the postcodes here, which is meaningful and not conclusive. Recorded means what made it into the records.
Flooding is the clearest mark against Port Isaac. Roughly a quarter of postcodes rating high on some measure and 53 properties flagged at high risk from rivers and the sea is a below-average showing, and the only sensible response is to check the individual address rather than the village.