Access, year-round operations, and cold-water planning details.
Freshwater fissure dive in Thingvellir National Park.
Freshwater fissure dive in Thingvellir National Park.
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Silfra is a shore-accessed freshwater fissure in Thingvellir National Park, where divers move through clear lava-walled passages and a shallow lagoon. The site is managed under park rules and is best approached as a guided cold-water dive with careful buoyancy and thermal protection.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 18m
Depth Note
Shallow lagoon sections lead into deeper fissure passages; park rules cap diving at 18 m and prohibit overhead or cave penetration.
Best Season
Year-round; shoulder seasons are quieter, while summer is busiest.
Typical Conditions
Crystal-clear freshwater with visibility often exceeding 100 m due to natural filtration through lava rock.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Use drysuit-grade thermal protection, maintain buoyancy control in narrow sections, and stay out of caves or overhead spaces.
Access Restrictions
Follow the buddy rule, meet certification and drysuit requirements, and complete any required medical screening before entering.
Legal Notes
Silfra is a regulated national-park dive area, so access and behavior follow Thingvellir rules and designated entry procedures.
Community notes to help plan your visit.
Scuba Diving
Guided scuba dives move slowly through the fissure and finish through the shallow lagoon, so buoyancy and trim matter more than speed.
Freediving
Freediving here is a cold-water, low-current experience that rewards calm buoyancy and careful thermal protection.
Snorkeling
Guided snorkeling is a common way to see Silfra, with the same clear water and cold-water protection needs as the dive experience.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Access, year-round operations, and cold-water planning details.
Site structure, clarity, and freshwater dive framing.
Park homepage with diving permission and parking notices.
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