Snorkelling Between Two Continents
Silfra is a fissure in Þingvellir National Park filled with glacial meltwater of extraordinary clarity — visibility exceeds 100 metres, making it one of the clearest bodies of water on earth. The fissure sits directly on the tectonic boundary between the North American and Eurasian plates, and snorkelling or diving through Silfra means floating between two continental plates in water so clear that the rock walls, the algae, and the sandy bottom are visible in photographic detail.
The water is glacial — approximately 2–4°C year-round. A dry suit (provided by the operator) keeps your body dry and insulated; your face (exposed through the mask) feels the cold. The snorkelling route follows the fissure for approximately 300 metres through four sections: the Big Crack (a narrow passage between the rock walls), Silfra Hall (a wider section where the visibility opens up), Silfra Cathedral (the deepest and most dramatic section), and the Silfra Lagoon (a shallow, bright area where the tour ends).
Silfra is typically combined with the Golden Circle tour — the fissure is within Þingvellir National Park, and the snorkelling adds 1.5–2 hours to the Golden Circle day.
Frequently Asked Questions
Do I need diving certification to snorkel Silfra?
No — snorkelling requires no certification (you float on the surface in a dry suit). Scuba diving at Silfra requires a dry suit certification and a minimum number of logged dives (typically 10+ with dry suit experience). Check the operator’s requirements.
How cold is the water?
Approximately 2–4°C year-round. The dry suit keeps your body dry and warm. Your face (exposed through the mask) feels the cold — most people describe it as intense but manageable for the 30–40 minute snorkelling duration.
How much does Silfra snorkelling cost?
Approximately 18,000–25,000 ISK ($126–175 USD) per person including the dry suit, guide, and equipment. The price reflects the specialist equipment and the certification required for the guides.
Is Silfra available year-round?
Yes — the water temperature and clarity are consistent year-round. Winter snorkelling (in the dark of the Icelandic winter) has a different atmosphere but the underwater experience is identical.