Port Isaac: Fishing, Pilchards and the Evolution of a Cornish Harbour Village

Port Isaac fills a narrow cleft in the slate cliffs of north Cornwall, its cottages packed so tightly down the valley sides that the lanes between them are barely wider than a person. Every part of that plan was shaped by the sea. The harbour gave shelter, the fish gave work, and the cellars, net lofts, alleys and quays that visitors walk through today were built to land, salt and press pilchards and to ship slate. Port Isaac’s history is the story of a working harbour that has changed its living several times in five hundred years. The village is a stop on the seventh day of our small group tour of England’s villages, and this article explains how to read it.

Harbour geography and shelter

The village owes its existence to a rare piece of shelter on an exposed coast. North Cornwall faces the full force of the Atlantic, and safe landing places are few. Port Isaac’s cove is protected to the west by the headland of Lobber Point, and the conservation area appraisal prepared for North Cornwall District Council calls it one of the safest natural harbours on this stretch of coast. A stream runs down the valley to the beach, and steep cliffs rise on either side, so the village had nowhere to grow but up the slopes.

The name probably reflects an older economy. The appraisal suggests it comes from the Cornish porth, harbour, and a word for corn, perhaps referring to an early corn mill. The first written reference, as “Portusek”, dates from 1338 and describes a fishing village. Around 1536 the antiquary John Leland called it “a pretty fisher village” with “a pier and some succour for fisher boats”, and that pier was built in the reign of Henry VIII. By 1584 the topographer John Norden found the village “wonderfully increased in buildings”.

At the head of the beach lies the Platt, a flat area that was the fishermen’s workplace, a safe place to haul up boats at high spring tides and the site of a weekly market. It is still the heart of the village.

Pilchards, boats and seasonal work

For several centuries the fish that mattered most in Cornwall was the pilchard. Each summer and autumn great shoals arrived off the coast, and the industry built to catch and preserve them employed whole communities. The appraisal records that the pilchard industry was flourishing at Port Isaac by 1500, and that around 1800 plentiful stocks drew investors to build new cellars and seine lofts, the stores for the large seine nets used to encircle a shoal. That success lasted, according to a local doctor’s memoir of 1834, about a decade before the stocks dried up.

The processing was laborious, and the National Maritime Museum Cornwall describes it well. The fish were layered with imported French and Portuguese salt in a “bulk” about four feet high and left for thirty to forty days. They were then washed and packed into barrels, around 3,000 pilchards to a barrel, and pressed with a weighted pole to squeeze out the oil, which was sold for lamps. Almost all the salted fish went to Italy, where Catholic households ate them on fast days. Cornwall’s pilchards, in other words, were an export industry tied to the Mediterranean.

The fishery left Port Isaac a busy place. In 1850 the village had 49 registered fishing boats and four fish cellars. But the shoals were unreliable, and by the 1860s the pilchard trade had shrunk to “one seine or so”. When the harvests finally failed in the 1920s, the appraisal records, the fishermen turned to herring, kippered in wooden smoke lofts, until the 1940s, and then to mackerel and shellfish.

What is a Cornish fish cellar?

It is the building where pilchards were salted and pressed, and Port Isaac still has one in use. The Fish Cellars at 1 Fore Street, listed at Grade II, date from the early nineteenth century and are built around a courtyard. Historic England’s listing describes their salt pits, net lofts and an open arcade on timber and granite posts. Fish were salted on the courtyard floor, then packed into leaky hogsheads, or barrels, set over gullies and pressed with stones hung from long beams fixed in niches in the walls, the oil draining away along the gullies. A kipper house was added later, and the cellars now hold lobster tanks and still serve the village’s crab and lobster fishery.

Around the corner, at Port Gaverne, a separate cove just to the east, several more early nineteenth-century cellars survive, among them the Union and Rashleigh Cellars, both listed. Rashleigh Cellars also had a herring kipper house and stored coal landed at the quay. Many such buildings have since become houses, but their long, low shapes still mark them out.

Slate, coal and coasting trade

Fishing was never the only business. By the reign of Elizabeth I, the appraisal notes, Port Isaac was shipping slate to France and Belgium. Slate came from the great quarry at Delabole a few miles inland, and the trade shaped both Port Isaac and Port Gaverne: in 1873 a local historian recorded slate travelling by road to Port Gaverne and on by boat to Port Isaac. In the 1830s coal arrived from Wales and earthenware from Bideford, while slate and corn went out. Later in the century small coasting vessels brought limestone and general goods from Plymouth. Some of the village’s chimneys are even built of brick that arrived as ships’ ballast.

The railway changed everything. The North Cornwall Railway opened a station called Port Isaac Road, about four miles from the village, in the 1890s. Slate moved to rail, the coasting trade declined, and fishermen began sending mackerel and shellfish to London by train. The railway also brought the first holidaymakers. The line closed to passengers in 1966.

Stores, lanes and working buildings

Walk up from the Platt and you are moving through the fabric of a working village. The historic core is made up largely of eighteenth- and nineteenth-century cottages, joined by narrow alleys known locally as drangs. Walls are built of local slatestone, roofs are of Delabole slate, and many upper walls are hung with overlapping slates, sometimes cut in decorative fish-scale patterns, to keep out the driving rain. Below Pentus Wall, a mid-nineteenth-century retaining wall, are fishermen’s stores. The most famous alley, Squeeze-Belly Alley, entered beside a cottage on Dolphin Street, was once described as one of the narrowest thoroughfares in the world.

The building materials are a lesson in local geology, just as limestone is in the Cotswolds and granite is on Dartmoor. Inland, the farmers of Devon and Cornwall built very different homes for a different way of life, as our article on Devon’s longhouses explains, but the same principle applies: the village is made of what lies beneath it.

The harbour itself was rebuilt in the twentieth century. In the 1920s the old Tudor structures were replaced by two breakwaters, first in local stone and then in concrete after the contractors went bankrupt. They still define the harbour’s shape, and keeping them in repair is a constant task: when part of the eastern breakwater collapsed in 2022, the harbour commissioners raised the money for repairs by public appeal.

Change in the coastal economy

Today the fishing is for crab and lobster, landed at the Platt and sold from the old fish cellars. It is a small trade. In 2022 the harbour commissioners reported that the number of commercial boats had fallen from about ten to two. Port Isaac’s population has stayed at roughly 900 to 1,000 since the 1950s, but its make-up has changed. After 1951, the appraisal records, many local families moved to new housing on the hilltop, fearing the old cottages would be condemned; by 2008 about 60 per cent of the buildings in the historic core were holiday lets. The parish now requires new homes to be occupied as main residences.

How screen visibility affects a living harbour village

Port Isaac is best known to many visitors as the fictional Portwenn of the ITV series Doc Martin, filmed here across ten series between 2004 and 2022. The attention brought money and crowds in equal measure. When filming began there was one coffee shop; by the end, press reports counted a dozen or more, and parking had become a serious problem. Some residents told reporters that visitors stop for tea and a scone but seldom buy the fish. The conservation area appraisal notes simply that visitor numbers rose as the village became a popular filming location. Our article on English villages on screen looks at how Port Isaac, Lacock and Castle Combe each balance the benefits and costs of that fame.

How steep is Port Isaac to walk around?

Quite steep. The lanes drop sharply from the upper village to the harbour, many are too narrow for pavements, and some are stepped. The walk back up is the hardest part. The tour is rated Level 2 (Moderate), with three to five hours of activity a day and up to 8 kilometres of walking on uneven ground, and comfortable shoes with a good grip are recommended.

Port Isaac on the England’s villages route

The seventh day of the tour follows the Cornish coast from Fowey to Port Isaac, with time to explore its nooks and crannies, before continuing to Clovelly and across North Devon and Exmoor to Dunster. Earlier in the trip, Polperro’s museum explains how fishing and smuggling shaped Cornwall’s coastal villages; at Port Isaac you can see the buildings that trade left behind. Our guide to the England’s villages itinerary shows how the West Country stops fit together.

Stand on the Platt and look around. The breakwaters are a 1920s answer to an Atlantic problem; the fish cellars are a nineteenth-century answer to a Mediterranean market; the cottages climbing the slope are a centuries-old answer to a lack of space. Read that way, Port Isaac is much more than a backdrop. If you would like to explore it with someone who can show you the evidence, the England’s villages small group tour is a good place to begin.