Southwest Iceland and Silfra

Before Entering the Water

• Verify the exact site and its current permissions. In Thingvellir only Silfra and Davidsgja are designated dive rifts. No solo entry, no caves or overhead environment, and no diving deeper than 18 m.
• For scuba, supply recognized Open Water/autonomous-diver certification and a drysuit certificate or instructor-confirmed proof of 10 logged drysuit dives within two years. Medical forms, suitable cold-water gear and current skill matter even if you have tropical scuba experience.
• For surface snorkeling, meet the chosen operator's swimming, age, height, weight, pregnancy and doctor-signoff requirements. Do not confuse a thick wetsuit option allowed by the park with the terms of a particular drysuit tour.
• Freedivers must use active trained buddy supervision, avoid hyperventilation and limit breath-hold activity to the guided product and their safe abilities.
• Plan for wind, rough coastal water, thermoclines or changing lake conditions, and do not treat old promotional pages as current access confirmation.

Sources: National park, Silfra scuba, snorkeling, DAN freediving.

After the Dive

Use conservative ascents and appropriate dive-computer guidance. DAN suggests at least 12 hours before a flight after one no-decompression scuba dive and at least 18 hours after repetitive or multi-day no-decompression exposures; decompression dives warrant longer intervals and medical assessment. Postdive high-altitude travel also matters. These are minimum risk-reduction guidelines, not a safety guarantee. DAN flying guidance.

For suspected drowning, serious cold illness, neurologic symptoms, chest pain, decompression illness or another emergency, call Iceland emergency services at 112. Landspitali University Hospital maintains a Hyperbaric and Dive Medicine Department at Fossvogur in Reykjavik and lists +354 543 1007 for 24/7 consultation with a diving physician; emergency recompression is activated following emergency-department evaluation, not by self-booked direct chamber admission. Request oxygen and emergency response through qualified rescuers. Bring a readable record of dives, times and symptoms and do not fly with suspected decompression illness. 112 / hospital dive emergency / hospital contact.

Thingvellir is a protected cultural and natural landscape. Use permitted dive entries, stay in open water, respect maximum depth and buddy rules, and avoid damaging delicate lava formations or leaving litter. Stay on signed historical paths above water. Do not infer permission for cave or overhead dives from Bjarnagja marketing; separate training, land access and guide permission must be verified. At Gardur, maintain neutral buoyancy over kelp and do not handle marine life. On Reykjanes, volcanic restriction zones, road barriers, gas warnings and local authority instructions override attractions and itineraries. Park / signed paths / coastal site / hazard assessment.