You can go ashore on nearly every island in the Oslo fjord, including the ones with houses and cabins on them. The right covers uncultivated land, and most of an island is uncultivated land. Around the buildings other rules hold, and in some places access is closed for part of the year.

Walking and swimming

Section 2 of the Outdoor Recreation Act (friluftsloven) gives anyone the right to walk on uncultivated land all year, so long as it is done with consideration and due care. Swimming from a shore on uncultivated land, or from a boat, falls under section 8, provided you keep a reasonable distance from inhabited houses. Section 7 lets you pull a boat ashore for a short while on an undeveloped beach.

If a private jetty blocks the only way further into the uncultivated land, you may pass, but then you take the shortest way past it.

Cultivated and uncultivated land: how close to the house you may go

Cultivated land (innmark) means house plots, farmyards, gardens and fields in cultivation. Uncultivated land (utmark) is everything else. The private zone around a house or cabin never reaches beyond the property boundary, and is usually smaller than it. Where it stops depends on the terrain, on what can be seen into, and on how large the building is.

Along the shore the Supreme Court has tightened the rule in the public’s favour: anyone who builds close to the sea has to accept people coming nearer than other landowners would, because the shoreline is worth so much for outdoor life. No fixed rule in metres exists. The practice is to stay off what is obviously someone’s outdoor living space, and otherwise to walk.

Tents: 150 metres and two nights

A tent may not be pitched closer than 150 metres to an inhabited house or cabin. After two nights it has to be moved, unless the landowner agrees to let you stay. The exception covers the high mountains and other remote places where staying does no harm, and an island in the Oslo fjord rarely qualifies. Camping that damages young forest is banned whatever the distance.

Fires: banned from 15 April to 15 September

Through that period it is forbidden to light a fire in or near forest and other uncultivated land. The ban covers disposable barbecues, fire pans, camping stoves and any other open flame. The regulation makes an exception for fire that plainly cannot start a blaze: a prepared fire site, snow-covered ground, or ground soaked through after long rain. The municipality can give permission, and can tighten the rule further when the fire risk is high.

Even outside the ban period, do not light a fire straight on bare rock. The damage to the rock is permanent and stays visible afterwards.

Seabird reserves

In the seabird reserves in the Oslo fjord, access is closed during the breeding season, as a rule from 15 April to 15 July. The dates vary between reserves, and in many places the ban covers boats closer than 50 metres to shore as well. 75 of the 125 islands here carry protection of some kind, and the boundaries are in Naturbase at the Norwegian Environment Agency.

The ban exists because eggs and chicks are left exposed when the adult birds are frightened off the nest. In 2023 the county governor proposed extending the period in the Oslo fjord to 15 March – 15 August, on the grounds that several species have no fledged young by the middle of July. We have not had it confirmed that the extension was adopted, so check the dates for the individual reserve.

The building ban along the shore

Section 1-8 of the Planning and Building Act bans building within the 100-metre belt along the sea. The exceptions are small structures serving agriculture, fishing or navigation, and municipalities may set their own building lines in the municipal plan. For a visitor the rule means the shoreline is meant to remain accessible uncultivated land, on islands covered in cabins as much as anywhere else.

The short answer

You can land, swim and walk on almost every island. Stay off what is obviously someone’s outdoor living space rather than counting metres. A tent belongs at least 150 metres from an inhabited house, and no more than two nights in the same spot. Fire is banned from 15 April to 15 September. If you are going ashore on a skerry in the breeding season, check Naturbase first. 31 of the 125 islands here are reached by road; the rest need a boat.

Sources

• The Outdoor Recreation Act (Lovdata, in Norwegian) § 1a cultivated and uncultivated land, § 2 access, § 7 landing a boat, § 8 swimming, § 9 camping
• Fire prevention regulations (Lovdata, in Norwegian) The fire ban 15 April – 15 September and its exceptions
• Planning and Building Act § 1-8 (Lovdata, in Norwegian) The building ban in the 100-metre belt
• Norwegian Environment Agency — questions on the right to roam The private zone around a house, private jetties, practice along the shore
• Naturbase (Norwegian Environment Agency) Protection boundaries and access bans per reserve
• County governor — consultation on an extended access ban (2023) The proposal of 15 March – 15 August, not confirmed as adopted
• Oslofjordens Friluftsråd Practical guidance for getting about the fjord

Last reviewed July 2026. This is an overview, not legal advice. Protection rules change, and Naturbase settles what holds for any given area.

Which islands carry protection is listed on each island page.