Safety · Country Guide
Sweden
Baltic shipwrecks, Skagerrak kelp forests and island-to-island cold-water adventure
Safety And Conservation
The principal risks are cold exposure, thermoclines, variable visibility, wind and currents, vessel traffic, precarious rocky entries and environmentally or historically restricted sites. Diving should be organized through qualified buddies or operators with first aid, oxygen and a rescue plan. Sweden protects marine habitats and archaeological wrecks; always consult the current local rules rather than relying on national generalities.
Top Risks
- Primary risk: Cold water beneath summer layers
- Secondary risk: Baltic bloom and poor bathing-water days
- Emergency contact: SOS Alarm / emergency dispatch (112)
- Safety overview: The principal risks are cold exposure, thermoclines, variable visibility, wind and currents, vessel traffic, precarious rocky entries and environmentally or historically restricted sites.
Dive safety
Cold-water Practice
Plan for a water temperature much lower than the air temperature. Verify equipment suitability, weighting and recent drysuit competency, and establish surface supervision and an abort plan. A shallow Baltic site can still be challenging with murky water and boat traffic.
Wrecks and Access
Most pre-1850 wrecks fall under Sweden's cultural heritage protections, and selected additional sites may have formal diving or anchoring bans. Do not touch or take objects, tie lines to wrecks, disturb silt or enter wreck interiors without specialized training and explicit lawful authorization. Dalaro Dive Park flagship sites require authorized guided arrangements.
Marine Areas and Freediving
Koster-Vadero has six charted coral-restoration locations with a specific ban on diving deeper than 40 m. Kullaberg has mapped protected sections closed to people and boats from March 1 through July 15. No solo freediving or hyperventilation; use dedicated rescue-capable in-water support.
Call 112 for urgent medical or maritime rescue. Tell responders the activity, location/GPS or boat position, dive depth and timing, symptoms, and any suspected decompression illness or arterial gas embolism. The responding emergency medical system determines suitable hospital and hyperbaric referral; do not drive toward an unverified chamber or fly after a suspected incident. For nonurgent health advice call 1177, or +46 771 1177 00 from a foreign-registered phone. Regional hospitals are concentrated around Stockholm, Gothenburg, Malmo/Lund, Karlskrona and Visby; remote islands require evacuation time. Carry a policy that explicitly covers scuba depth, drysuit training, wreck/specialty activity and medical evacuation where applicable.
Snorkel and freedive safety
Cold water beneath summer layers
SMHI monitoring found winter sea temperatures near 2°C to 4°C and August surface readings around 18°C to 19°C in the 2024 reporting period. Thermoclines can bring colder water below.
Baltic bloom and poor bathing-water days
Warm, calm summer conditions favor cyanobacteria. Avoid discolored or scummy water, obey beach warnings, and use current SMHI and municipal observations.
Wrecks are legally protected
Many pre-1850 wrecks are protected ancient monuments, and some sites are under diving or anchoring bans. Do not touch, collect, penetrate or anchor on wrecks.
Marine-park and nesting exclusions
Specific Koster-Vadero coral-restoration zones prohibit diving deeper than 40 m. Mapped Kullaberg bird-protection sections also prohibit presence and boat traffic from March 1 to July 15.
Wildlife and protected areas
Sweden's first marine national park, Kosterhavet, protects kelp, eelgrass and uncommon deep-water marine habitats. The county authority restricts boats, anchoring, wildlife approaches and specific coral-restoration sites; bird and seal sanctuaries have date-defined buffers. Kullaberg bans removal of seafloor organisms in its marine reserve and closes mapped seasonal bird zones. In the Baltic, minimize silt disturbance and obey protected-wreck rules, even if a site is not signposted. Avoid swimming in suspected cyanobacteria blooms, never feed marine animals and dispose of no gear, fishing line or litter at sea.
Do Not Do This
Avoid entering when cold water beneath summer layers. Confirm local briefings before committing.
Emergency contacts
| Contact | Role | Phone | Availability |
|---|---|---|---|
| SOS Alarm / emergency dispatch | Immediate medical, sea rescue, fire or police emergencies | 112 | 24/7 |
| Swedish healthcare advice | Nonurgent medical assessment and care navigation | 1177 | 24/7 |
| Healthcare advice from foreign-registered phones | Nonurgent healthcare advice | +46 771 1177 00 | 24/7 |
| Swedish Police nonurgent | Non-emergency police contact | 114 14 | Published national nonurgent line; check international dialing details |