Silfra offers a rare way to experience Þingvellir’s rift valley: float through a narrow fissure between the North American and Eurasian tectonic plates. The water is strikingly clear, the rock walls seem close enough to touch, and the quiet makes the slow drift feel otherworldly. It is a cold-water experience year-round, so most visitors explore it on a guided tour with specialist equipment.
Snorkeling or scuba diving?
Snorkeling keeps you at the surface and lets you take in the fissure at a relaxed pace; scuba diving takes you below and has additional certification requirements. For divers, the park requires an appropriate qualification and dry-suit certification or accepted recent dry-suit experience. Check the operator’s requirements before booking and choose the experience that fits your comfort in cold water.
Cold-water gear and requirements
The water stays around 2–4°C, making proper equipment central to the experience. Full cold-water protection is required, including gloves, hood and neoprene footwear. Snorkelers can use a dry suit or a thick, well-fitting wetsuit; ask what your booking includes. Operators also require a medical screening form, with a doctor’s approval for some participants.
View in GoExploringSnorkeling and diving must be done with a buddy, and entering caves or other overhead spaces is prohibited. Tour operators set their own participation limits, so check that everyone in your group is eligible. If you’d rather explore Iceland on dry land, browse our Iceland adventure guide.