Do Puffins Migrate? UK Puffins’ Winter Journeys Explained

Every August, Britain’s puffin colonies fall silent. Burrows empty. The clifftops that buzzed with whirring wings for four months go quiet. The question that always follows is simple: do puffins migrate, or do they just disappear?

They migrate. But it looks nothing like a swallow's southward flight. Puffins scatter individually across the open Atlantic in a pattern that took scientists decades to piece together, and one that is still not fully mapped.

This guide covers how and where UK puffins spend their winter, how far they travel, what tracking science has revealed, and what an increasingly disrupted winter means for an already pressured species.

Resident or Migratory? Setting the Record Straight

Atlantic puffins are true migratory seabirds. They are not year-round residents like robins or house sparrows. Their year divides cleanly into two phases:

• Breeding season (April–August): spent on land at their natal colonies
• Non-breeding season (August/September–March): spent entirely at sea

During the breeding window, puffins return to the same islands, re-enter or dig burrows, and raise a single chick. Once the season ends — usually late July for chicks and August for adults — they leave land completely. Most will not touch solid ground again until the following spring.

What makes their winter unusual, even among seabirds, is that it is genuinely offshore. They do not retreat to sheltered estuaries or southern coastlines. They live on the open North Atlantic, sometimes hundreds of miles from the nearest land, through the harshest months of the year.

UK Puffin Migration: Key Facts

Where Do UK Puffins Actually Go?

Until geolocators appeared in the late 2000s, scientists relied mainly on occasional ring recoveries. The new technology changed everything.

A geolocator weighs just 2 grams and records light levels. When the bird is recaptured the next spring, researchers can reconstruct a rough daily position for the entire winter. The results surprised almost everyone.

A Dispersive, Not Directed, Migration

Puffins from UK colonies do not migrate as a flock to a single destination. Research published in PLOS ONE by Guilford et al. (2011) showed that each bird follows its own highly individual route, covering different distances and wintering in different areas. Remarkably, the same bird repeats that exact route in later years with high consistency.

Puffins do not inherit a genetic migration map, nor do they learn a shared cultural route from the flock. Each bird works out its own path during its early years at sea and then sticks to it. This individual route fidelity is unusual among migratory birds.

Main Wintering Regions

• Birds from east-coast Scottish colonies (especially the Isle of May) often remain in the north-western North Sea in early winter, then move into the eastern North Atlantic, sometimes reaching the mid-Atlantic ridge.
• Birds from Welsh and Irish colonies, including Skomer, head rapidly west. Many reach the Newfoundland–Labrador shelf by October.
• Some individuals travel as far north as Greenland or Iceland. Others stay in the Norwegian Sea or move south toward the Bay of Biscay. In harsh winters, a few even enter the Mediterranean.
• Severe Atlantic storms can push birds much farther south than usual.

There is no single “puffin wintering ground.” The species scatters by design. Spreading out reduces competition for food across the available prey field.

Distance, Timing, and How They Navigate

How Far Do Puffins Travel?

Migration distances vary enormously between individuals. Some birds from UK colonies winter within 500 km of their breeding site; others cross the Atlantic entirely, covering several thousand kilometres in a matter of weeks. Research on Greenlandic puffins recorded one female travelling over 13,600 km in a single migration, covering vastly more distance than any male in the same study — suggesting sex differences in migration strategy may exist in some populations.

Puffins from Irish colonies tracked by Jessopp et al. (2013) reached the Newfoundland-Labrador shelf, roughly 4,000 to 5,000 km from their breeding sites, by October, before retreating to the mid-Atlantic for the rest of winter.

Departure and Return Windows

• Departure (post-breeding): Late July to September. Chicks leave the burrow at night, unaccompanied, making their own way to sea. Adults follow in August once chick-rearing is complete.
• Winter moult: During the non-breeding period, puffins undergo a full wing moult and become flightless for several weeks. During this time they are entirely dependent on swimming and diving for food and escape.
• Return to colonies: The earliest birds appear back at UK breeding sites in late February or early March; the majority return in April. Timing is influenced by latitude; southern colonies typically see earlier returns.

Navigation: A Mechanism Still Being Studied

Navigation across featureless open ocean is still being studied. Puffins appear to combine:

• the sun’s position for compass orientation
• geomagnetic cues for positioning
• detailed memory of the routes they learned in their pre-breeding years

Because each bird repeats its own unique path while routes differ between individuals, route memory seems to dominate over genetic programming.

Survival Challenges at Sea

Spending six months in the open North Atlantic is not a passive act. Puffins face a sustained set of threats during the non-breeding period that directly influence survival rates and, by extension, breeding success the following year.

Food Availability

Puffins rely on small schooling fish — sandeels, sprat and herring — year-round. In winter, ocean temperature, currents and productivity decide where prey is found. When fish are deep or widely scattered, birds must dive deeper or travel farther, depleting energy reserves. Birds that return in poor condition often lay later or skip breeding altogether.

Storms and Severe Weather

Powerful Atlantic storms can exhaust birds, push them away from productive feeding areas, and drive them ashore in a weakened state. In January–February 2023, 223 Atlantic puffins were found dead along the Canary Islands coast after a series of severe storms displaced them far south of their normal range. Seabird “wrecks” are not new, but their frequency may be rising with changing storm patterns.

Human-Caused Mortality

• Bycatch: Puffins dive to catch fish and can become entangled in set nets and longlines, drowning before they can surface. Bycatch remains a significant and largely unquantified source of mortality.
• Oil pollution: Winter storms concentrate puffins in areas of heavy shipping traffic. Oil spills and chronic low-level pollution from bilge discharge affect birds that inadvertently come into contact with surface slicks.
• Light pollution from vessels: Artificial light at sea attracts puffins and other seabirds at night, leading to collisions with ship structures, a particular risk for juvenile birds making their first migration.

What Tracking Technology Has Revealed

Before geolocators, researchers depended on ring recoveries — dead birds found with leg rings. Thousands of recoveries, summarised in the BTO Migration Atlas, still left most of the winter picture blank.

Deployments at the Isle of May, Skomer and other UK colonies have shown a clearer seasonal pattern: early-winter excursions into the Atlantic, a more settled mid-winter range, then a shift again as spring approaches.

Long-term monitoring by the RSPB and the Joint Nature Conservation Committee (JNCC) feeds into international assessments, including the OSPAR Commission’s work on North-East Atlantic seabirds.

Climate Change and the Disrupted Winter

Climate change is altering puffin migration, and the direction of change is consistent and concerning.

Shifting Prey Distributions

Warming North Sea temperatures have driven sandeels deeper and further north. For puffins from east coast Scottish colonies, this is a double problem: less food for chicks during the breeding season, and less reliable fish aggregations in historic wintering areas.

The documented shift in winter distribution for Isle of May puffins, from North Sea wintering towards Atlantic excursions, is consistent with declining food availability in the North Sea. Birds are travelling further to find sufficient prey.

Timing Changes and Mismatch Risk

Migration timing in seabirds is tuned to prey availability, arriving at colonies when food conditions are optimal. As ocean temperatures change, the timing of prey blooms shifts. If puffins return to colonies before peak food availability, or if fish populations peak while puffins are still at sea, chick survival suffers.

Unlike terrestrial birds, puffins cannot adjust departure timing based on local vegetation cues. Their oceanographic timing signals are shifting at a rate that may exceed their biological capacity to adapt.

Frequently Asked Questions

When do puffins leave the UK?

Most adult puffins leave breeding colonies from late July through August. Chicks depart at night, unaccompanied, before the adults, typically in late July. By September, UK colonies are largely empty.

Where do UK puffins go in winter?

Into the open North Atlantic, primarily. Individual birds scatter widely, some winter in the Norwegian Sea, others head west to the Newfoundland shelf or mid-Atlantic, and a few move south towards the Bay of Biscay. There is no single wintering ground. Each bird follows its own route, learnt early in life and repeated annually.

Can I see puffins in the UK in winter?

Not at coastal viewing sites. Puffins are offshore from August to March. Pelagic boat trips in the North Sea or northern Atlantic during winter may encounter them far from land. Any puffin seen on a beach in winter has likely been storm-blown and may need wildlife rehabilitation support.

Final Thoughts

So do puffins migrate? Yes, but not in the way most migratory birds do. They disperse individually across the North Atlantic in routes that are personal rather than shared, spending their winter months on open ocean that most of us will never see.

Puffin migration connects the wellbeing of the bird directly to the health of an entire ocean system. Food availability in winter, storm survival, and bycatch risk all feed back into whether a pair will successfully raise a chick the following summer.

Watching puffins at Skomer or the Farnes in summer, you're watching the successful outcome of a six-month open-ocean journey that science is still working to fully understand. That makes every returning bird more remarkable than it might first appear.