Why Seals Haul Out at All

A haul-out site is simply a stretch of shore where seals come to rest, and it is as essential to them as feeding grounds are. Because seals are marine mammals that must give birth, nurse, moult and sleep on land, they cannot survive without somewhere undisturbed to do it. Unlike dolphins and whales, they have no option to simply float and doze indefinitely — sleep at sea can only be brief for them, since they must keep surfacing to breathe.

That is why you will find them gathered on sandbanks, shingle spits, rocky skerries and quiet estuaries right around the UK coast, from the Wash and the Thames estuary to Northumberland, Pembrokeshire, the Hebrides and the Northern Isles. The UK is internationally important for both grey seals and common (harbour) seals, holding a substantial share of the world population. Many haul-outs are tidal, appearing only at low water, and the seals shift with the tide onto a different bank or shore.

The key point for anyone living near the coast or visiting regularly is this: rest is not laziness. It is how seals build up energy, digest food, keep warm and raise their young.

Pupping and Moulting: The Seasons That Matter Most

Disturbance matters all year, but two periods are especially sensitive.

Pupping season. Grey seals give birth largely between September and December, peaking in October and November. Common seals pup earlier, usually in June and July. Newborn pups, particularly grey seal pups with their white coats, cannot swim well for the first couple of weeks. Their mothers leave them on shore between feeds, returning every few hours to nurse. A single careless approach can separate mother and pup, and the pup may then be abandoned.

Moulting season. Seals must haul out for weeks to shed and replace their fur, and they are especially reluctant to move during this time. Grey seals moult mainly between January and April; common seals generally through August. Large gatherings on shore are normal and not a sign that anything is wrong.

• A mother may abandon a pup if people or dogs crowd her.
• A stampede into the water costs energy, risks crushing injuries and can separate pups from mothers.
• Repeated disturbance has a cumulative effect, even if each individual encounter seems brief.

The Safe Distance Rule of Thumb

Stay at least 100 metres from seals on shore, and give 150 metres or more if pups are present. Many popular haul-out sites ask for greater distances, and local signage should always be followed. If you are unsure, further away is always the better choice — binoculars or a zoom lens will give you a far better view than a close approach anyway.

Watch the seals, not just your step. These are reliable signs that you are too close:

• Heads lift and several seals stare in your direction.
• Seals start shuffling, stretching or moving towards the water.
• A sudden rush or "stampede" of the whole group into the sea.

Always leave a clear route between the seals and the water. Never walk or paddle between a haul-out and the sea, and never approach from the seaward side, which cuts off their escape. Where rope lines, boardwalks or waymarked paths exist, stay behind them, and keep your voice low.

Dogs, Drones and Other Disturbances

An off-lead dog is the single most common cause of a haul-out stampede, and a seal bite is a serious injury that needs urgent medical attention — for the dog as well as the person. Keep dogs on a short, fixed lead near any haul-out, and turn back rather than pushing on. Extendable leads are not adequate here.

Drones are another significant problem. Even a drone flown legally at height can disturb seals below, and flying close enough to photograph them can trigger a full stampede. If you want aerial images, buy them from someone operating well away from sensitive sites.

Other pressures to avoid include kayaks, paddleboards and small boats edging towards haul-outs, jet skis near resting groups, beach fires and barbecues close by, and litter — especially netting, line and plastic loops, which entangle seals. In the UK, seals are protected by law, and it is an offence to intentionally or recklessly disturb them.

If a Seal Approaches You or Looks Stranded

Seals are naturally curious, and a swimmer or kayaker may find one coming over to investigate. Enjoy it from a respectful distance: do not touch, feed or swim towards it, do not surround it, and if it keeps closing in, calmly move away rather than trying to shoo it off.

A lone white-coated pup on a beach is usually not orphaned. Its mother is very likely offshore, feeding, and she will not come back while people are nearby. Do not move or cover the pup. Keep everyone, and every dog, back at 150 metres or more, and watch quietly.

Do contact a marine wildlife rescue charity if the animal has obvious wounds, looks very thin, is coughing, or is tangled in netting — or if a pup is still alone after several hours of watching. Give a precise location, note the time, and take photographs from a distance if you can do so safely.

Being a Good Coastal Neighbour

Living or regularly walking by the coast puts you in a privileged position, and a little planning goes a long way. Check tide times so you are not walking onto a bank just as seals are settling on it, keep to the upper shore or clifftop where possible, and choose wildlife-watching boat trips that keep their distance and work to recognised codes of conduct.

If you see disturbance — a dog chasing seals, a drone hovering over a haul-out, a group crowding a pup — report it to the local wildlife trust, harbour authority or the police, with details of time and place. And consider joining a local seal survey or coastal conservation group: volunteering is the one way to get genuinely close to these animals without causing them harm.

Give them space, and the seals will keep coming back to your stretch of coast year after year — which is, in the end, the whole point of living beside them.