Harbour SealPhoca vitulinaWhere and when to see them

Also called the common seal, the harbour seal inhabits sheltered and exposed coasts around Norway and Scotland. Its rounded face and spotted coat distinguish it from the larger grey seal when viewed carefully. The word common is not a reliable guide to local abundance: some populations have declined substantially. Resting seals depend on predictable, undisturbed haul-outs, where even well-intentioned visitors can interrupt essential rest or nursing.

Size

1.2–1.9 m body length

Weight

60–150 kg

Lifespan

20–35 years

Status

Least Concern

Harbour seals divide their time between feeding at sea and resting on coastal rocks, sandbanks or beaches. They may gather closely ashore without forming the territorial breeding colonies typical of some other seals. Mothers nurse pups for a short period, and pups enter the water early in life. During moult, more time ashore supports skin warmth and hair replacement. Sudden group movement often signals disturbance rather than play. Pups are born with a soft natal coat and are capable of swimming within hours of birth, reflecting their readiness for a semi-aquatic life. Their social structure is generally less complex than other seal species, often forming loose aggregations rather than highly organized colonies.

• Harbour seal pups can swim within hours of birth.
• Females generally live longer than males.
• Males produce breeding calls while in the water.
• Resting seals sometimes hold both head and hind flippers raised in a curved posture.

Summer often brings pupping and moulting activity to northern European haul-outs, making careful distant observation especially important. Seals remain present year-round in many districts. Consult local tide information and site guidance rather than assuming every beach is productive at low tide. While present year-round, summer viewing during pupping and moulting offers unique opportunities to observe social interactions ashore. Successful observation often depends on understanding local tidal patterns, as seals frequently haul out at low tide.

Sheltered sea lochs, archipelagos, estuaries and sandy tidal channels offer feeding areas beside suitable haul-outs. Rocky skerries are particularly characteristic in Norway and western Scotland. Access to quiet resting places matters as much as the apparent extent of surrounding coastal water. They demonstrate strong site fidelity, often returning to the same haul-out sites year after year, sometimes across generations. These coastal areas provide crucial refuge from predators and strong currents, and are often located near good foraging grounds.

These opportunistic predators eat locally available fish, including sand eels, herring, flatfish and members of the cod family. Squid and crustaceans supplement the menu. Individuals can develop repeated foraging routes, but diets differ among colonies and change as prey availability shifts. Despite their varied diet, they are efficient hunters, often consuming their prey underwater. Seal scat analysis is a common method used to study the specific fish and invertebrate species consumed in different regions.

Common name

Harbour Seal

Scientific name

Phoca vitulina

Animal group

Mammals

Size

1.2–1.9 m body length

Weight

60–150 kg

Lifespan

20–35 years

Status

Least Concern

Identification

A short, concave muzzle, rounded head and closely set V-shaped nostrils distinguish harbour seals from the longer-faced grey seal. Their pelage varies from light grey to dark brown, often with individual speckles that can aid in distinguishing them. Unlike grey seals, harbour seals typically hold their head and neck in a more upright, banana-like posture when resting ashore.