Bornholm – Facts, Figures and Things to Know

Location and geography

Bornholm lies far to the east of mainland Denmark in the Baltic Sea, closer to Sweden and Germany than to Copenhagen. The diamond-shaped island is separated from Sweden by only a narrow strait, which is why the fastest ferry connection runs via the Swedish port of Ystad rather than via Denmark.

Geologically, Bornholm differs from the rest of Denmark: the north rests on solid granite bedrock with rugged cliffs, while the south is characterised by fine sand and flat beaches. This divide explains why hiking and climbing are concentrated in the north, and beach holidays in the south.

Population and towns

As of 1 January 2026, Bornholm's total population is estimated at around 38,700 (Statistics Denmark projection). The island also forms its own municipality within the Capital Region of Denmark (Hovedstaden).

The largest town and main ferry port is Rønne, with about 13,700 residents in early 2025. Smaller harbour and fishing towns round out the picture – most notably Svaneke on the east coast, Denmark's second-smallest market town (købstad) and one of the sunniest spots in northern Europe. For an overview of the island's towns and their character, see the Places hub.

Getting there by ferry and flight

In 2026, ferries are operated by Bornholmslinjen (part of the Molslinjen group) on three routes to Rønne:

• Ystad (Sweden): fast ferry, crossing around 80 minutes, roughly five times a day – by far the fastest and most frequently used link from the mainland.
• Sassnitz/Mukran (Germany): around 3 hours 20 minutes, mainly during the summer season and only on a few days a week.
• Køge (near Copenhagen): around 5 hours 30 minutes, often run as an overnight crossing.

For a quick trip, fly instead: in 2026, DAT (Danish Air Transport) connects Copenhagen (CPH) with Rønne (RNN) year-round, several times a day. Flight time is just 30 to 35 minutes, with tickets from around 459 DKK one way. Day-to-day departures vary considerably by season, so check the official online timetable for exact planning. Full details on both routes are covered in the guides Ferries to Bornholm and Flights to Bornholm.

Landmarks – Hammershus and the round churches

In the north stands Hammershus, the largest castle and fortress complex in northern Europe. Construction began around 1255 and was largely complete by around 1300; the outer wall ran for roughly 750 metres. Around 1750 the fortress was partly dismantled and long served as a stone quarry. Today, access to the ruin is free, as is the visitor centre – only the P2 car park charges a fee from the Saturday before Palm Sunday until the end of the autumn half-term (week 42), at 30 DKK for 6 hours. To avoid the parking fee, leave the car at Hammersholm or Opalsøen instead. More detail in the Hammershus guide.

Bornholm's second landmark is its round churches – fortified medieval churches with massive, round granite walls. They're open to visitors during the day unless a service, wedding or funeral is taking place; some charge a small fee:

• Østerlars – admission 30 DKK; free in winter between the morning and evening bells.
• Nylars – free admission.
• Ny Kirke (Nyker) – open Easter to week 42, Monday to Friday 09:00–15:00, admission around 10 DKK.

For the fourth round church, at Olsker, reliable opening hours and prices for 2026 aren't confirmed – it's best to check locally or with the tourist office.

Nature, beaches and European bison

At the island's southern tip lies Dueodde, a beach stretching for kilometres of remarkably fine, white sand. In 2021, Lonely Planet ranked it 17th on its list of the 20 best beaches in Europe, praised above all for its low light pollution. A selection of other beaches is gathered in the Beaches hub, and the destination page itself covers Dueodde Beach.

One inland curiosity is the European bison (wisent) herd in the Almindingen forest. In June 2012, seven European bison from Poland were released into a fenced area of around 200 hectares around the Svinemosen bog, and the herd still lives there today. They can be observed along two marked routes: a roughly 4-kilometre loop from the car park on Christian X's Vej that runs right through the enclosure, and a longer route of around 12 kilometres through Almindingen. The animals are most active in the morning and evening; keeping a minimum distance of 100 metres is compulsory.

The best way to explore the island actively is by bike: Bornholm is criss-crossed by over 230 kilometres of signposted cycle paths, many of them flat and following former railway lines. National Cycle Route 10 circles the island along the coast for around 105 kilometres. Suggested stages are set out in the guide Cycling on Bornholm.

Climate and best time to visit

Bornholm has a mild maritime climate and comparatively low rainfall – annual precipitation averages around 600 to 800 millimetres, concentrated in autumn and winter. Summers tend to be dry; from May to July, the island averages more than seven hours of sunshine a day. Svaneke, on the sun-favoured east coast, is considered one of the sunniest places in northern Europe.

For a beach holiday, July and August are the safest bet, though that's also peak season. May to September are mild to warm; September is noticeably quieter, with weather that's often still warm. Anyone wanting to see the island's smokehouses and attractions in full swing should still aim to visit between Easter and the autumn half-term – outside that season, many businesses are closed.

Food and drink – smokehouses and "Sol over Gudhjem"

Bornholm's culinary identity centres on its smokehouses (røgerier). They typically open around Easter and run through to after the autumn half-term (week 42) – Hasle Røgeri, for instance, from late March to late October. Well-known, confirmed-active operators include Gudhjem Røgeri, Svaneke Røgeri, Hasle Røgeri, Allinge Røgeri and Nordbornholms Røgeri in Allinge, whose shop is open daily from 09:00 to 18:00 in season. The exact number of active smokehouses varies from year to year, but several major houses run continuously.

The classic dish is "Sol over Gudhjem" ("Sun over Gudhjem") – smoked herring on rye bread with a raw egg yolk, chives and radish. For which smokehouse to choose and where to eat, see the guide Smokehouses on Bornholm.