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Scuba Diving in SilfraIS
A flooded fissure in Thingvellir National Park where the North American and Eurasian plates pull apart, filled with lava-filtered glacial water of absurd clarity.
Why here
Silfra is the only place on earth where you dive directly in the rift between the North American and Eurasian tectonic plates. The fissure is fed by glacial meltwater that has filtered through lava fields for decades before it wells up, and the result is visibility routinely measured at 100 meters and more, the clearest widely-dived water anywhere. The site sits inside Thingvellir National Park, a UNESCO World Heritage site and the seat of the world's oldest parliament, and the water holds a constant 2 to 4 degrees, which is why every dive is a drysuit dive. It is a bucket-list dive that actually survives its own reputation: the blue of the Silfra Cathedral section does not photograph as well as it looks.
Best months
Diveable year-round at a constant 2-4C; May to September brings long daylight and easier surface conditions. Divers need Open Water plus a drysuit certification or 10 logged drysuit dives; drysuit courses are taught on site. Snorkeling requires no certification and runs all year.
Getting there & around
Thingvellir is 50 minutes from Reykjavik on the Golden Circle; operators run day trips with all gear or meet you at the site. Dive slots are capped, so book well ahead in summer.
Skill levels: intermediate, advanced
Schools & guides (2)
DIVE.IS
SchoolPADI 5 Star center and the original Silfra operator, running guided fissure dives and snorkels since 1997 plus the PADI Dry Suit Diver course the site requires.
Iceland Dive Expeditions
OutfitterSmall-group operator running PADI-guided Silfra dives and snorkel trips with Reykjavik pickup.