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Kosterhavet National Park

Welcome to Sweden’s first marine national park.

Sweden’s First Marine National Park

Discover the stunning beauty of Sweden’s first marine national park, located in the heart of the Koster Sea. Home to a rich variety of West Coast marine life, this unique area also hosts many rare species found nowhere else in the world. The park’s vibrant underwater landscape stretches beyond borders - connecting with Norway’s Ytre Hvaler National Park to the north and the Väderö Islands marine nature reserve to the south. It's a must-visit destination for nature lovers, divers, and anyone curious about life beneath the waves.

Kosterhavet National Park

Located just off the coast of northern Bohuslän, this national park is a treasured destination for outdoor enthusiasts. As one of Sweden’s most visited tourist spots, it offers a perfect blend of natural beauty, adventure, and relaxation by the sea.

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Visitor centre

The main entrance to the national park is located on South Koster and can be reached by a Västtrafik ferry from Strömstad. The scenic ride takes about 45 minutes - and best of all, entrance is completely free.

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Activities

Kosterhavet is one of Sweden’s most popular tourist destinations, offering unforgettable experiences in stunning coastal surroundings. Whether you're into hiking, paddling, diving, swimming, or simply soaking in the beauty of nature, Kosterhavet has something for everyone. Explore scenic trails, paddle through crystal-clear waters, or enjoy relaxing days on the islands, along the mainland coast, or by the outer archipelago.

Certified activities in Kosterhavet

Explore eco-friendly adventures and dine at local restaurants certified by Smaka på Västsverige.

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Family Fun

Strömstad and the nationalpark offer lots of fun activities for children of all ages. Fish for crabs, cycle on the Koster Islands, go on a seal safari, or visit popular attractions such as naturum Kosterhavet and the Tjärnö Aquarium, where you can learn more about life beneath the surface.

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Maritime fun in the national parks

Are you thinking of taking the family to the archipelago paradise on the border and wondering what you can do there? Here are some tips for a three-day experience in Kosterhavet and Ytre Hvaler national parks.

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Hiking

Nature reserves & walking paths adjacent to the national park

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Paddling on the border

The border region between Østfold in Norway and Dalsland and Bohuslän in Sweden is ideal for kayak or canoe paddling.

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Kayak rental

Explore a list of companies offering guided kayak trips, courses, and rentals in Strömstad and Tanum.

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Boating in Kosterhavet

As a sea traveler, you can help protect the park’s precious nature for future generations! Download Cast Off on Nature’s Terms, a helpful guide filled with tips for anyone visiting the park. 

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Cycling on South Koster

Explore a stunning part of the Bohuslän archipelago by bike. Ride past charming fishing villages set against the breathtaking beauty of the Kosterhavet sea. 

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Good to know before your visit

Getting here

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Restaurants & Cafés

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Koster Islands

If you’re visiting Strömstad, be sure to take a boat trip out to the Koster Islands. On South Koster, you’ll find a charming network of mostly car-free, bike-friendly paths that run alongside scenic walking trails. 

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Stay

Strömstad and Tanum municipality offer plenty of opportunities to find a place to stay that suits both your needs and your wallet. If you arrive by boat, there are plenty of guest harbours.

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Safety and rules

In view of the delicate nature involved, special rules apply to the national park.

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Maps and brochures

Looking for a map or brochure of the National Park? Download them here and start planning your visit!

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