Speed Limits in the Oslofjord: The Most Common Zones
# Speed Limits in the Oslofjord: The Most Common Zones
Speed limits on the water are just as important as on the road – they exist for everyone's safety. The Oslofjord has several types of speed zones you need to know about, whether you're operating a motorboat, jet ski, or other watercraft.
General Rules
In Norway, the basic principle is: there is no general speed limit at sea, but you must always maintain a "safe speed" according to the International Regulations for Preventing Collisions at Sea (COLREGS). In practice, this means adapting your speed to weather, visibility, traffic, and proximity to shore.
Additionally, many municipalities have enacted local regulations with specific speed limits.
The Most Common Zones in the Oslofjord
5 Knots (approx. 9 km/h / 6 mph)
This limit typically applies:
- Within 150 meters of shore in most municipalities along the Oslofjord
- In harbor areas – all inner harbors in Oslo, Drøbak, Son, Horten, Tønsberg, etc.
- Near swimming areas – marked with yellow buoys
- In narrow channels – e.g., the Steilene strait
30 Knots (Special Zones)
Some areas have a 30-knot limit as a transition zone between inner waters and open sea. Check local regulations for your area.
Open Water
Outside regulated zones, there is no numerical speed limit, but you are still obligated to maintain safe speed. In practice this means:
- Reduce speed in poor visibility
- Show consideration for sailboats, kayaks, and small boats
- Avoid creating unnecessary wash toward shore and docks
Specific Areas in the Oslofjord
Oslo Harbor and Inner Fjord
All of inner Oslo harbor has a 5-knot limit. This applies from Hovedøya through Bjørvika, along Aker Brygge, and around Bygdøy.
Drøbaksundet
Drøbaksundet is narrow and carries heavy traffic – including ferries and cargo ships. Reduce speed and keep well to starboard. Speed limits vary, but exercise extra caution.
Nesodden/Bunnefjorden
Several bays along Nesodden have local 5-knot limits. The innermost part of Bunnefjorden also has restrictions.
Jet Skis – Special Rules
Jet skis follow the same speed limits as other vessels, but there may also be local bans on jet ski use in specific areas. Check the municipality's website before planning your route. Rent a jet ski in Oslo and familiarize yourself with the current regulations.
Consequences of Speeding
Police boats in the Oslofjord are active throughout summer, and regular checks are conducted. Fines for exceeding the speed limit in a 5-knot zone typically start at NOK 3,000–5,000, but can be significantly higher for serious violations.
Tips for Maintaining Correct Speed
- Use your GPS speedometer – most chart plotters display your speed.
- Learn how your wake pattern changes – a planing boat creates a different wake than one in displacement mode.
- Be especially attentive in narrow channels and harbor entrances.
- Download the Norwegian Coastal Administration app for updated charts with speed zones.
Browse all boats for rent in Oslo and read our article on 10 boat trips from Oslo for more inspiration.
