Silfra Diving
Everything you need to know about scuba diving at Silfra Fissure — certification requirements, depth, dry suit logistics, and how diving compares to snorkeling.
Silfra Fissure is one of the only places on Earth where you can scuba dive directly between two tectonic plates — the North American and Eurasian continental shelves. The fissure sits inside Þingvellir National Park, a UNESCO World Heritage Site, and offers underwater visibility exceeding 100 metres in glacial meltwater filtered through lava rock for decades. If you hold the right certifications, a Silfra dive is an experience unlike anything else in the diving world.
Most visitors to Silfra choose the guided snorkeling tour instead — and for good reason. But for certified divers, here is what the scuba option looks like.
Certification Requirements
Silfra diving is not open to beginners. You must hold:
- PADI Dry Suit Diver certification (or equivalent from SSI, BSAC, CMAS)
- Minimum 10 logged dry suit dives — your logbook will be checked on site
- Comfortable buoyancy control in a dry suit environment
These requirements are non-negotiable. Icelandic law mandates a certified guide for all Silfra activities, and operators will turn away divers who cannot prove their qualifications. If you are not dry suit certified, the snorkeling tour is the right choice — no certification is needed and the surface views are equally spectacular.
What Diving at Silfra Is Like
The dive follows the same route as the snorkeling tour — Big Crack, Silfra Hall, Silfra Cathedral, and Silfra Lagoon — but you experience it from depth rather than the surface.
- Maximum depth: approximately 18 metres (60 feet) in Silfra Cathedral, which reaches 63 metres at its deepest point
- Time in water: 30–45 minutes of bottom time (shorter than snorkeling’s 50 minutes, due to air consumption at depth)
- Water temperature: 2–4°C (35–39°F) year-round — identical to snorkeling
- Visibility: 100+ metres — arguably the clearest freshwater dive on the planet
- What you see up close: lava walls carpeted in bright green algae, the narrow Big Crack passage, and the vast cathedral chamber dropping away below you
The cold is manageable in a properly fitted dry suit with thermal undergarments, but expect your face and lips to feel the 2°C water — neoprene hoods and gloves help, though some heat loss is unavoidable.
Silfra Diving vs Snorkeling — Side by Side
| Snorkeling | Scuba Diving | |
|---|---|---|
| Certification needed | None | Dry suit cert + 10 dives |
| Time in water | ~50 min (surface) | ~30–45 min (at depth) |
| Maximum depth | Surface only | ~18 m (60 ft) |
| Visibility experience | Look down into the fissure | Swim through the fissure |
| Free GoPro photos | Included | Varies by operator |
| Starting price | From $145/person | From $250/person |
| Free cancellation | Yes, up to 24h | Yes, up to 24h |
| Best for | Beginners, families, most visitors | Experienced dry suit divers |
Most visitors — including experienced divers — choose snorkeling for their first Silfra visit. The surface perspective is extraordinary because the water clarity lets you see the full depth of the fissure from above. Diving offers the immersive close-up experience, but at a higher price and with strict prerequisites.
How to Book a Silfra Dive
Diving tours depart from the same meeting point as snorkeling tours: the P5 parking lot at Þingvellir National Park, roughly 45–50 minutes from Reykjavik via Route 36. Tours run year-round.
What is typically included in a diving tour:
- Certified dive guide
- Dry suit, tanks, weights, and regulators
- Safety briefing and gear check
- Hot drinks after the dive
What is usually not included: underwater photos (some operators offer this as an add-on), hotel pickup, and parking at Þingvellir (ISK 750 / ~$5).
Should You Dive or Snorkel Silfra?
If you have the certifications and dive experience, Silfra diving is a bucket-list dive. The close-up perspective of the fissure walls and the sensation of hovering in water so clear it feels like flying is unmatched.
If you are not dry suit certified — or if this is your first time at Silfra — the guided snorkeling tour is the way to go. At $145 with a PADI guide, full dry suit, and free GoPro photos included, it delivers the same crystal-clear fissure experience from the surface with zero certification required.
Ready to Book?
The top-rated Silfra Fissure snorkeling tour is available year-round — from $145 per person with free cancellation and free underwater photos.
Ready to Snorkel Between Two Continents?
The top-rated Silfra Fissure snorkeling tour includes a PADI guide, dry suit, free GoPro photos, and hot drinks — from $145 per person with free cancellation.
Check Availability & Book