Baltic Sea & North Sea — Sweden

Best Anchorages in Sweden

The Stockholm Archipelago's 30,000 islands, the granite skerries of Bohuslän, Gotland's medieval walls and limestone sea stacks — Sweden is one of Europe's great sailing destinations, made uniquely accessible by Allemansrätten: the constitutional right to anchor freely anywhere in Swedish waters.

0cm

Tidal range (Baltic Sea)

30,000

Islands (Stockholm archipelago)

Free

Anchoring (Allemansrätten)

Jun–Aug

Peak sailing season

Baltic Sailing — Key Differences from Atlantic & Mediterranean

The Baltic Sea is almost tideless — water level is controlled by wind and atmospheric pressure, not the moon. A strong sustained westerly can lower east-coast water levels by 0.5–1m; storm surges can double this. Plan shallow-water approaches using current weather, not a tide table. The water is brackish (0.3–0.9% salinity vs 3.5% ocean) — different antifouling requirements, different marine ecology, and no barnacle problem. Isostatic uplift (land rebounding from ice-age glacier weight) is raising the seabed 5–8mm/year throughout Sweden — some chart data is 100+ years old and no longer accurate near shore. Always use current digital charts (Navionics or Swedish Maritime Administration charts) in the archipelagos. Allemansrätten gives every sailor the constitutional right to anchor freely anywhere in Swedish waters outside designated protection zones — no fees, no permits, just the obligation to “not disturb, not destroy.”

Sailing Regions

Stockholm Archipelago

6 anchorages

30,000 islands and skerries stretching from central Stockholm to the open Baltic — one of the world's largest archipelagos and Sweden's most popular cruising ground. The archipelago divides into three zones: the Inner (forested, populated, easy pilotage), the Middle (Möja, Finnhamn — the sweet spot for most sailors), and the Outer (Sandhamn, Utö, Landsort — windswept granite, more exposure, fewer facilities). Some 60+ gästhamnars (guest harbors) provide showers, saunas, and laundry. Under Allemansrätten, free anchoring in any cove is a legal right. Charts must be current — land rises ~5mm/year through isostatic uplift.

Sandhamn (outer archipelago)Finnhamn (middle)Utö (southern outer)Grinda (inner)
Best months: Jun–AugDifficulty: Moderate

Chart data in some areas is 100+ years old; 5mm/year isostatic uplift creates new hazards — use current Navionics charts; bird sanctuaries: no landing Apr–Jul; water depth varies up to 1m with storm surge

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Bohuslän (West Coast)

6 anchorages

Sweden's west coast from Gothenburg to the Norwegian border: 8,000+ granite islands and skerries with higher salinity than the Baltic (cold North Atlantic inflow through the deep Koster trench). The Kosteröarna (Koster Islands) are Sweden's most westerly inhabited islands — car-free, ferry-accessible from Strömstad — and sit inside Kosterhavet, Sweden's first Marine National Park. Bohuslän has more in common with Norwegian Sørlandet than Baltic sailing: rock navigation, crab and lobster pot hazards, and a vibrant shellfish culture (the world's finest oysters, mussels, and langoustines come from these waters).

Koster Islands (Kosterhavet NP)StrömstadMarstrandTjörn island
Best months: Jun–AugDifficulty: Intermediate

Kosterhavet NP: no anchoring in bottom-protection zones; 5-knot speed limit May 15–Aug 31; 100m from seal/bird sanctuaries; max 2 consecutive nights; crab/lobster pot lines — approach pots slowly from downwind

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Gotland & Öland

6 anchorages

Sweden's two Baltic islands offer a completely different experience from the mainland archipelagos — open-water passages, limestone geology, and medieval history. Gotland's Visby is a UNESCO World Heritage walled city. The coastline is fringed with raukar — extraordinary Silurian limestone sea stacks up to 10m high, remnants of ancient coral reefs eroded by wave action. Fårö island (north Gotland) has Sweden's most dramatic rauk fields. Open Baltic exposure means real weather: westerlies of 20–30 knots are common, and 50+ knot storms possible in autumn. Passages to Gotland from the mainland are 60–90nm open water.

Visby (UNESCO, Gotland)Fårö Island raukarStora Karlsö (bird sanctuary)Borgholm (Öland)
Best months: Jun–AugDifficulty: Intermediate / Advanced

Open Baltic exposure: 20–30 kt westerlies common, 50+ kt storms possible; 60–90nm passage from mainland requires weather window; Stora Karlsö bird sanctuary: restricted access; fog risk Apr–May

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Blekinge & Skåne (South Coast)

6 anchorages

The southern gateway to Sweden — the natural entry point for sailors arriving from Denmark, Germany, or the wider Baltic. The Blekinge Archipelago contains 1,000+ islands with calm, sheltered waters ideal for first-time Baltic sailors. Karlskrona is a UNESCO World Heritage Site (naval heritage), spread across 30 islands. Tjärö island is the jewel of the south: red fishing cottages, free-grazing animals, a generous guest jetty, and a good café. Shallow waters throughout require careful chart-reading; no tides to complicate the approach.

Tjärö islandKarlskrona (UNESCO)Hanö islandUtklippan (outer lighthouse island)
Best months: May–SepDifficulty: Easy / Intermediate

Shallow waters throughout — use current charts; Karlskrona military area: some zones restricted; Hanöbukten bay: exposed to easterly fetch from open Baltic; good entry point for non-EU boats (Karlskrona customs)

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Gulf of Bothnia

6 anchorages

The narrow sea between northern Sweden and Finland is a specialist destination — remote, shallow, and getting shallower every year. Isostatic rebound (land rising as it recovers from ice-age glacial pressure) is lifting the seabed at up to 8mm/year, which means chart data becomes outdated faster here than anywhere in Europe. Salinity approaches fresh water (0.3%) — almost a freshwater lake. The upside: extraordinary wilderness, minimal other traffic, and the Kvarken Archipelago (Finnish side) is a UNESCO World Heritage Site. For most cruising sailors, the northern Swedish coast is a transit region rather than a destination.

HärnösandHärnönKvarken Straits approachHöga Kusten (High Coast, UNESCO)
Best months: Jun–AugDifficulty: Advanced

Isostatic uplift 8mm/year: chart data outdates rapidly — very current charts essential; salinity near zero (0.3%) — freshwater-like Baltic; shallow sills in Kvarken Strait (25m max depth); extremely remote — limited facilities

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Swedish Sailing Rules — Summary

  • !Allemansrätten: Constitutional right to anchor freely in all Swedish waters outside designated protection zones. No permit, no fee. Obligation: leave no trace, respect wildlife, no disturbance of residents or bird nesting (Apr–Jul).
  • !Kosterhavet National Park: No anchoring in bottom-protection zones; 5-knot speed limit May 15–Aug 31; 100m from all seal and bird sanctuaries; maximum 2 consecutive nights in same location.
  • !Chart accuracy: Use current digital charts throughout Swedish archipelagos. Isostatic uplift (5–8mm/year) and old survey data create hazards not shown on older charts. Navionics or Sjöfartsverket charts recommended.
  • !Non-EU temporary admission: 18-month limit without duties. Declare at Karlskrona, Stockholm, or Gothenburg customs on entry. Goods over SEK 3,500 require full customs declaration.
  • !Bohuslän fishing gear: Crab and lobster pot lines are extensive; approach pots slowly from downwind/down-current to avoid fouling propeller. Lines are at least 30m long and not always visible at surface.

For a full overview of Northern European anchoring rules, see our overnight anchoring rules by region guide.