Spotting Seals and Dolphins from British Cliff Tops

Why the cliff top beats the boat

There is something quietly thrilling about standing on a headland in a stiff onshore breeze, binoculars pressed to your eyes, waiting for a dark fin to break the surface a few hundred metres below. Britain has thousands of miles of coast, and some of the best marine mammal watching in Europe happens from dry land. You get height, which means you can see the shape of a whole bay rather than just the patch of water beside a hull. You get silence, or as close to it as the gulls allow, which matters enormously when you are trying to spot animals that are wary of engines. And you get to go home with dry socks.

Seals and dolphins are not rare around our shores. Grey seals breed in colonies from Cornwall to the Northern Isles, harbour seals lurk in sheltered estuaries, and bottlenose dolphins patrol the Irish Sea and the Moray Firth. Add harbour porpoises, common dolphins, minke whales and the occasional basking shark, and a patient afternoon on a good headland can deliver more than most people expect.

Choose a cliff with the right ingredients

Not every headland is equal. Look for a promontory that juts out into deep water, with a stretch of calm, sheltered sea on one side and a tide race or current on the other. Dolphins and porpoises tend to feed where water is churned and fish are concentrated, so points, narrows and the mouths of estuaries are productive. Seals, by contrast, prefer the lee of the land.

Other things to look for:

• Height with a clear view down — 50 to 150 metres above sea level is ideal. Too low and you lose the angle to spot fins; too high and you struggle to judge distance and identify what you are seeing.
• Firm, safe ground well back from the edge — cliff faces crumble, and no seal is worth a fall.
• Exposed rocks and skerries below — classic haul-out sites for grey seals, especially at low water.
• Working water — anywhere you see gannets diving, terns plunge-feeding or shearwaters shearing is worth an hour of your time.

Places with a reputation for a reason include the Pembrokeshire coast, the Llyn Peninsula, Cardigan Bay, the Isle of Mull and the Ardnamurchan peninsula, the Northumberland coast around the Farne Islands, the Yorkshire coast near Flamborough, and the cliffs of north Norfolk at places like Hunstanton and Cromer. But plenty of quiet local headlands do just as well.

Time it with the tide, the light and the weather

Timing is the difference between a blank hour and a memorable one. The two golden windows are the first two hours after dawn and the last two before dusk, when the light is low, the water often flattens, and animals seem to surface more readily. Midday glare bounces off the sea and hides fins beautifully.

Tides matter just as much. Around low water, exposed rocks bring seals out to haul, rest and digest — often in loose, loaf-shaped clusters that are easy to overlook until one yawns. Dolphins often feed best on a flooding tide, especially in the two hours either side of the change when currents stir baitfish into shoals. A calm day with a light offshore breeze is ideal; a full gale simply churns everything into grey soup and sends the animals elsewhere. Check a tide table before you leave, not when you arrive.

What you are actually looking for

Learn three or four silhouettes and you will spot far more.

• Grey seals — large, Roman-nosed heads, often "bottling" upright with just the face above the surface, or lying flat on rocks like enormous slugs. Pups in autumn have creamy-white fur.
• Harbour seals — smaller, rounder, with a distinctive concave forehead. They favour estuaries and sandbanks.
• Bottlenose dolphins — chunky, dark grey, with a tall, curved, sickle-shaped fin. They often travel in small groups and will bow-ride boats.
• Harbour porpoises — small, shy and rolling, with a low triangular fin and almost no splash. Easy to mistake for a ripple.
• Basking sharks — two fins, one behind the other, moving slowly at the surface in summer.

The classic giveaway is a sudden, purposeful disturbance in otherwise flat water, or a flock of gulls gathering and diving in one spot. Scan in slow, overlapping sweeps rather than darting about, and always start with your naked eye before lifting the binoculars.

Kit and technique for cliff-top scanning

Binoculars are essential. Something in the 8x42 or 10x42 range gives a bright image and a wide enough field of view to hold a moving animal. Higher magnification sounds tempting but wobbles badly in a sea breeze. Polarised sunglasses cut surface glare, which is worth more than any gadget. A small notebook or phone for notes helps you learn what your local animals do and when.

Technique matters more than equipment. Sit or lean against something solid for stability, put the sun behind you, and scan the calm patches rather than the choppy ones. Give any spot a full twenty minutes before moving on. And take a flask — the best sightings usually arrive just as you have decided to leave.

Watch without disturbing them

Marine mammals are protected, and the privilege of seeing them comes with an obligation to leave them be. From a cliff top you are already at a respectful distance, but the rules still apply.

• Keep quiet — sudden shouts, whistles and loud radios carry across water and can flush seals off their haul-outs.
• Stay back — keep at least 100 metres from hauled-out seals, and further from seals with pups. Never position yourself between an animal and the sea; it is their escape route.
• Leave the drone at home — aerial disturbance causes real stress to seals and dolphins.
• Keep dogs on a short lead and away from the cliff edge.
• Report injured or entangled animals to the coastguard or a marine wildlife rescue organisation, and note the location carefully.

Stay on marked paths, take your litter home, and resist the urge to get "just one photo" closer. Look after these animals and they will keep returning to our cliffs for generations of quiet, binocular-wielding watchers to enjoy.