Sources · Destination Guide

Kosterhavet and Stromstad

Sweden's marine national park: cool-water diving, interpreted snorkel trails and island life

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Destination Guide Sources For Kosterhavet and Stromstad

Reference links used to build and maintain this guide.

42 sources • Updated Oct 29, 2026

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Oct 29, 2026.

Swedish National Parks: visiting Kosterhavet - Official year-round access and seasonal visitor and wildlife activity guidance.
Swedish National Parks: getting here - Park entrances, ferries from Stromstad and access by road.
Swedish National Parks: snorkel trails - Official Rorvik and Hasslebukten trail locations, lengths, depths and safety warning.
Swedish National Parks: things to do - Hiking routes, interpretation trails and Ursholmen features.
Vastra Gotaland County: Kosterhavet rules - Primary national-park protections, seasons, anchoring, speed limits and wildlife zones.
Vastra Gotaland County: Koster islands nature reserve - Rules on island camping, dogs, travel and separate reserve jurisdiction.
Vastra Gotaland County: 2025 coral dive prohibition - Official county press release dated November 24, 2025: prohibitions effective December 19, 2025, six restoration sites.
Vastra Gotaland County: regulations index - County legislation index for 14FS 2025:31 and 14FS 2025:32, legal zone boundaries.
Vasttrafik: Koster route changes September 2026 - Effective September 27, 2026: Kosterlinjen took over, 899 year-round, 898 summer, bicycle carriage.
Kosterlinjen: tickets and transfer - Current operator describes 40-60 minute ferry crossings, stops, ticket supplier and service.
Trafikverket: Bohusbanan rail works - Train replacement buses to Stromstad from April 20 through December 12, 2026.
Swedish National Parks: Sydkoster hiking - Official walking trail segments including Rorvik circuit, Ekenas, Kilesand and Langegarde.
Swedish National Parks: Nordkoster hiking - Official Nordkoster pedestrian trails.
Swedish National Parks: naturum Kosterhavet - Park visitor centre at Ekenas, exhibitions, visitor information and published hours.
West Sweden Tourism: Kosterhavet - Regional tourism authority on marine park tourism, free access and activity types.
West Sweden Tourism: Koster all year - Seasonal services, summer visitor peak and autumn and winter travel experience.
West Sweden Tourism: seal safaris - Summer boat-based seal watching and Ursholmen excursions; not an animal-sighting guarantee.
West Sweden Tourism: public transport to Stromstad - Air gateway and train, bus, road and Norwegian ferry connection information.
Stromstad Sport Diving Club: 2026 excursions and prices - 2026 club excursion page lists guest prices and air fills, but schedule says under construction and Facebook takes precedence.
Trident Divers: legacy operator pages - Historical Sydkoster operator description. Original page could not be independently refetched; do not treat schedule or equipment as currently confirmed.
Kosterbladet 2026: local contacts directory - 2026 visitor publication page 15 lists Trident Divers as a dive centre with contact number, not verified service availability; older ferry listings are superseded.
Lyths Nordkoster: 2026 campsite rates - Official Nordkoster campsite lists 2026 tent pitch prices, booking and payment conditions.
SMHI: marine and coastal weather - National meteorological service for forecast checks on wind, swell and marine conditions.
SMHI: Swedish Marine Monitoring 2024 - Regional marine temperature observations, not a site-specific dive temperature forecast.
Swedish Maritime Administration: rescue contact channels - Swedish maritime distress contact, 112 and VHF marine channel 16.
1177 Sweden: health advice - Medical advice 1177, including access via foreign numbers.
1177: Capio primary care, Stromstad - Current mainland routine-care listing and contact details, not an emergency or recompression centre.
Sahlgrenska University Hospital: hyperbaric unit - Specialist hyperbaric service at Ostra Hospital in Gothenburg; referral via emergency services for suspected DCI.
Swedish Migration Agency: short-stay entry rules - Schengen entry and visa requirements according to nationality and permit status.
Visit Sweden: currency, cards and cash - Swedish krona, extensive card use and cash access planning.
Visit Sweden: tipping - Voluntary tips, not an obligatory percentage.
Swedish Electrical Safety Authority: electrical installations - Swedish electrical installation authority and national voltage standards.
Swedish Agency for Marine and Water Management: bathing water - Bathing-water monitoring and the need to check current advice.
Swedish National Parks: staying in the park - Overnight and camping restrictions, separate island rules.
West Sweden Tourism: Ursholmen lighthouse - Official regional destination description for Ursholmen lighthouse excursions.
West Sweden Tourism: Koster cable ferry - Summer attended cable ferry between Nordkoster and Sydkoster; ordinary boats are alternative outside summer.
Color Line: Sandefjord to Stromstad ferry facts - Current scheduled Norwegian gateway sailing, 2.5 hours, separate from Koster island public ferry.
West Sweden Tourism: Koster ferry - Tourism listing for Stromstad north harbour location, ferries and card-based tickets.
Swedish Maritime Administration: rescue contact procedures - Distress calls on Swedish emergency 112 or VHF 16, with call sign SWEDEN RESCUE.
County diving prohibition 14FS 2025:31, Stromstad sites - Binding 2025 county prohibition, four specified Stromstad-area polygons, effective December 19, 2025; maps are in appendices.
County diving prohibition 14FS 2025:32, Tanum sites - Binding 2025 county prohibition for Spiran and Djuprannan polygons, effective December 19, 2025; maps in appendices.
Destination hero photo by Bengt Nyman - Coastal islets in the Koster archipelago, Sweden. Photo: Bengt Nyman / Wikimedia Commons. CC BY 2.0: https://creativecommons.org/licenses/by/2.0. Cropped and resized.