Iceland’s Silfra Fissure: Diving Between Two Continents

Iceland’s Silfra Fissure: Diving Between Two Continents

Silfra Fissure, located in Iceland’s Thingvellir National Park, allows you to scuba dive directly between the North American and Eurasian tectonic plates. Formed by earthquakes in 1789, the plates drift approximately two centimeters apart each year, creating a unique rift filled with glacial meltwater that emerges from Langjökull glacier after filtering through volcanic lava rock for decades.

Crystal-Clear Visibility & Unique Cold-Water Conditions

This water is among the cleanest on the planet. Filtered for up to a century through lava rock, it arrives at Silfra with visibility well over 100 meters under ideal conditions. The water temperature stays between 2°C and 4°C year-round, making a properly fitted dry suit mandatory—even during summer dives.

Sections of the Dive: Hall, Crack, Cathedral & Lagoon

Silfra is divided into four main areas:

• Silfra Hall, with cave-like passages and shallow swim-throughs up to 13 meters depth.

• Big Crack, where you can float between continental plates in a narrow rift.

• The Cathedral, a dramatic 100-meter-long fissure with up to 100-meter visibility and depths around 20 meters.

• Silfra Lagoon, a final section of about 120 meters in length with shallow clear water.

Divers typically spend about 30–40 minutes underwater and enjoy a briefing on site geology, dry suit operation, and environmental stewardship.

Who Should Dive Silfra

Only certified scuba divers with a dry suit certification—or at least ten logged dry suit dives in recent years—can dive Silfra. Visibility and site sensitivity mean operators keep groups small, typically one guide to three divers. Snorkeling is popular, but divers get more freedom to explore the fissure’s depth and formations.

Visiting Tips & Local Insights

Tours depart from Reykjavík with a 45–60 minute drive to Thingvellir. After gearing up, divers walk approximately 400 meters to the water’s edge, then climb into the fissure with ladder access. Briefings include dry suit checks, depth awareness, and buoyancy control in cold water.

The fissure is protected, and aquatic life is scarce due to low temperatures. You may see small Arctic char or distinctive green algae in the final lagoon section, but the true attraction is the geology and water clarity.

Happy and safe diving,
The ScubaBlast Team

Smithsonian Magazine. Dive Between Two Continents in This Frigid Fissure in Iceland. Retrieved from https://www.smithsonianmag.com/travel/dive-between-two-continental-plates-iceland-180957983/

DIVE.IS. Dive Site Silfra in Thingvellir National Park, Iceland. Retrieved from https://www.dive.is/dive-sites/silfra

Guide to Iceland. Snorkeling Between the Continents at Silfra Fissure. Retrieved from https://guidetoiceland.is/connect-with-locals/asa1/snorkeling-between-continents-silfra-fissure-1

Wandering Wagars. What Is the Water Like in the Silfra Fissure? Retrieved from https://wanderingwagars.com/iceland-silfra-between-the-continents/

Reddit. Diver experiences at Silfra fissure. Retrieved from https://www.reddit.com/r/scubadiving/comments/1csnhl2

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