Why Cornish harbour seafood tastes different

Cornwall's coastline is short on motorways and long on coves, which is exactly why its seafood is so good. The distance from boat to plate is often measured in yards rather than days. In places like Newlyn, Mevagissey, Padstow and St Ives, the day's catch is landed, iced and sold within a few hours, and much of it never leaves the county at all.

The practical upshot for visitors is simple: eat where the boats moor. A harbour-side counter with a chalkboard menu that changes with the tide and the weather will almost always beat a polished restaurant with a laminated list of imports. If you can see creels being stacked or nets being mended, you are in the right place.

The crab sandwich: a proper benchmark

If you only eat one thing on a Cornish harbour wall, make it a crab sandwich. It is the region's most honest test of quality, because there is nowhere to hide. Good versions use white and brown meat together, a little lemon, a whisper of black pepper and decent bread that can stand up to the filling without turning to paste.

What to look for:

• Brown meat included. It carries the depth of flavour. A sandwich of pure white meat is pleasant but bland.
• Freshness over refrigeration. Ask when the crab was picked. The answer should be "this morning" or "yesterday", not a vague shrug.
• Minimal mayonnaise. Enough to bind, not enough to drown. You want to taste the sea, not the jar.
• Honest pricing. Hand-picked crab is labour-intensive, so cheap usually means frozen or bulked out.

Order it dressed rather than plain if you want the full experience, and eat it outdoors. Sand in your sandwich is practically part of the ritual.

Mackerel, grilled and unadorned

Mackerel is the fish that defines a Cornish summer. It arrives in shoals close to shore, which means line-caught specimens can be on a grill within hours of leaving the water. The flesh is rich and oily, so it needs very little: a hot grill, a squeeze of lemon, a pinch of sea salt and perhaps a slice of sourdough to mop up the juices.

Whole grilled mackerel is the classic, but smoked mackerel pâté, mackerel wrapped in foil with herbs, and cured mackerel with beetroot all turn up on harbour menus. If you see it listed as "today's catch", ask how it was caught. Line-caught fish is handled individually and arrives in better condition than trawled fish crushed in a net.

Late summer is peak season. By October the shoals move offshore and the menus shift towards hake, pollack and ling, which are every bit as good and often better value.

What makes a good coastal chippy

A harbour chippy is not the same as a high-street one, and the good ones share a set of quiet signals. Look for a short menu, a visible fryer, and a queue of locals at an odd hour of the afternoon. If the fish is displayed on ice rather than sitting pre-battered under a lamp, you are onto something.

Points worth checking:

• Batter that clings. It should shatter rather than slide off in a single sheet, which usually means the oil is hot enough and the fish was dry before it went in.
• Named fish. "Cod" and "haddock" are fine, but a board offering hake, pollack or lemon sole suggests a kitchen buying from the harbour rather than a wholesaler.
• Proper chips. Thick-cut, floury potatoes, cooked twice. Thin fries belong elsewhere.
• Salt and vinegar applied at the counter. Non-negotiable, and best done generously.

Eat them out of the paper on a bench overlooking the water. Wind is part of the seasoning.

Timing your visit around the tides

Harbour eating is governed by the tide, the weather and the working week. Boats do not land on Sundays in many ports, and a stiff south-westerly can keep the fleet tied up for days. That is not a problem, it is just something to plan around.

A few practical habits help. Arrive mid-morning if you want to buy fish straight from a quayside stall, when the ice is freshest and the choice is widest. Book harbour-side tables well ahead in July and August, or eat a late lunch after two o'clock when the first sitting has cleared. And if a gale is forecast, expect menus to lean on frozen-at-sea staples and shellfish rather than line-caught specials.

Beyond the classics

Once you have worked through crab, mackerel and chips, branch out. Spider crab, picked slowly at a picnic table, is sweeter than brown crab and worth the effort. Grilled sardines with nothing but oil and salt are a revelation when they are truly fresh. Mussels farmed in the estuaries are among the most sustainable seafood you can order, and a bowl of them with cider and cream is a proper Cornish supper.

The rule that ties it all together is the same one the fishermen use: buy what is landed today, cook it simply, and eat it within sight of the water. Do that and you will not go far wrong anywhere along the Cornish coast.