The Silfra SnorkelingReykjavik: Silfra Snorkeling & Lava Tunnel Adventure Combo review
What the tour is like
You meet in Reykjavík, drive to Raufarhólshellir lava tunnel for a walk through the 8,000-year-old underground cave formed by flowing lava. Then you drive to Silfra, suit up, and snorkel the fissure. Jonathan said the drysuit did a good job and he didn’t need towels. Sophie praised guides Franklin and Suzhou, noting she snorkelled “Silfra in a snowstorm” — proof that winter tours run year-round. The long hours mean you need endurance and flexibility.
This is for people who want to see two geological wonders in one day — the ancient lava cave and the modern fissure.
What works
- Combines two major geological sites
- Transport from Reykjavík included
- Small groups throughout
- Winter proof point: Silfra runs even in snow
- Drysuit performs well in cold water
- 4.5 rating shows solid real-world use
Worth knowing
- 5–10 hours is a long day with lots of driving
- Only 220 reviews (thin compared to flagship tours)
- No photos included (fissure or lava tunnel)
- Weather can affect lava tunnel safety
- Requires good fitness and patience
Bring layers for both above-ground and underground. The lava tunnel is cool (around 5°C) and damp; the water is 2–4°C. Wear sturdy shoes for the lava walk. Bring water and snacks for the long day.
Who it’s for
Adventure seekers who want to combine geological experiences. People without a rental car who want to skip driving. Fit travelers with a full day to spend. Winter visitors (it runs year-round). If you want just Silfra with less commitment, see the photos tour ($143) or pickup tour ($213). If you want the Golden Circle plus Silfra, see the golden circle combo ($295).
Other tours to consider
Best ratedSilfra: Fissure Snorkeling Tour with Underwater Photos
Golden Circle comboFrom Reykjavík: Golden Circle Tour and Silfra Snorkeling
For certified diversFrequently asked questions
How long is the lava tunnel part?
Raufarhólshellir is an 8,000-year-old cave. Tour length varies (5–10 hours total) depending on which sections you explore and how much driving is involved. Ask the operator for breakdown on arrival time.
Can I snorkel if I only want the lava tunnel?
No — this is a combo tour. If you want lava only, search GetYourGuide for lava-tunnel-only options. If you want Silfra only, see the photos tour ($143).
What if the weather is bad?
Lava tunnel tours can be affected by weather or closure. The operator will notify you of changes. Silfra itself runs year-round regardless of weather.
Is this the fastest way to do both?
Yes, time-wise. But it’s also the most fatiguing. If you have two separate days, booking each tour independently gives you more rest.