Silfra Fissure Snorkeling + Lava Tunnel Tour – SuperSaver Combo

The best part of this South Iceland combo tour is the sharp change of scene: first you crawl through a lava tunnel formed by volcanic fire, then float in clear water between the North American and Eurasian tectonic plates. It packs two unusual Iceland experiences into one long day.

I like the strong variety and the fact that the main gear is supplied. Guides such as Kevin, Siggy, Taz, Mino, Fede, and the lava-cave team members have been praised for clear instruction, humor, and care. The catch is that the day can feel poorly joined together, with long waits, changing schedules, and occasional complaints about wet or ill-fitting snorkeling gear.

Key points to know before booking

• Two very different Iceland adventures: Raufarhólshellir is a physical underground walk, while Silfra is a cold-water float in Thingvellir.
• Silfra is the star for many people: The water is exceptionally clear, and the view can stretch more than 50 meters on a good day.
• The price covers a lot: At about $212.93 per person, you get both activities, equipment, certified supervision, underwater photos, and optional Reykjavík transport.
• This is not a gentle sightseeing day: You need to swim, handle restrictive dry-suit gear, and have moderate physical fitness.
• Plan for schedule friction: The activities may operate as separate tour groups, so meeting instructions and waiting times deserve careful attention.
• Pack for getting wet: Bring warm base layers, thick socks, gloves, a hat, towel, spare clothing, and lunch.

What this Iceland combo actually gives you

This is a full-day outing of about 10 hours. The two headline stops are Raufarhólshellir lava tunnel and Silfra fissure in Thingvellir National Park. You can add pickup and drop-off from a listed Reykjavík meeting point, or make your own way to the lava tunnel at Raufarhólshellir 816.

The maximum group size is 18 people, though the snorkeling portion is handled in smaller groups. That matters. Snorkeling in a dry suit is awkward at first, and you want a guide close by while you adjust to the cold water, narrow mask view, and floating position.

At the time of writing, the cost is about $212.93 per person. That is not cheap, but Iceland activities add up quickly, and this price includes the two main experiences, caving and snorkeling equipment, a PADI-certified divemaster for Silfra, underwater photos, hot chocolate, cookies, and optional transport. I see reasonable value here if both activities are high on your list.

The value is weaker if you mainly want Silfra. In that case, booking the water activity alone may give you a cleaner schedule and less time spent waiting between parts of the day.

Raufarhólshellir: an active walk below the lava

The day begins at Raufarhólshellir, one of Iceland’s better-known lava tunnels. You put on the supplied caving gear, then follow your guide underground through a passage shaped by an ancient lava flow.

This is not simply a short walk into a decorated cave. Expect uneven ground, unusual rock shapes, colorful surfaces, and sections that may require climbing or crawling. One especially appealing part is the sense of moving through a real volcanic formation rather than looking at a polished indoor attraction.

The guides add a lot here. Jonas and Apollo have been praised for making the cave educational and fun, while other guides have used Icelandic volcanic activity to explain how lava tubes form. You can expect information about the tunnel, volcanoes, and the forces that shaped Iceland.

The cave section is a good fit for active adults, older children, and anyone who likes a little dirt and physical effort. It may be less suitable if you have trouble walking over uneven ground or dislike confined spaces. The minimum age is 12, and anyone under 18 must be accompanied by a parent or adult guardian booked on the same tour.

You should wear warm clothing under the caving gear and good hiking shoes. The cave itself may not feel like the coldest part of the day, but Iceland weather can change fast, and you will appreciate having proper layers when moving between the stops.

The long middle of the day: lunch and possible waiting

Lunch is not included. Bring a packed meal or buy food at designated stops. This is worth planning instead of leaving to chance, because the schedule is already long and the gap between activities may not feel like a normal lunch break.

The biggest practical weakness is the transition from the lava tunnel to Silfra. Since the activities can run as separate tours, you may find yourself waiting for the next departure rather than moving straight from one attraction to the other. Some schedules have involved nearly two hours at a bakery, with limited comfort and no bathroom available.

That kind of pause can be tiring, especially in winter or when you are already wearing damp outdoor clothing. If you are driving yourself, arrive at the lava tunnel at least 15 minutes before your stated start time and confirm the full day’s timing. Do not assume that the first group you see is automatically your group.

If you choose Reykjavík pickup, the pickup process can take up to 30 minutes. Be at your selected meeting point at the stated start time and allow patience for the route around the city. A climate-controlled minibus is useful in Iceland, but transport does not remove the need to pack food, warm layers, and spare clothes.

Thingvellir and Silfra: the reason to tolerate the cold

The second half takes place at Thingvellir National Park, a UNESCO World Heritage Site. The park matters for both its geology and its place in Iceland’s story, but the tour’s main focus is Silfra, the water-filled fissure connected with the separation of the North American and Eurasian tectonic plates.

After changing into snorkeling gear, you enter the water with a certified divemaster. The dry suit is designed to keep most of your body dry, but it is tight around the neck and can feel restrictive across the shoulders and arms. Getting dressed takes time, and the fitting is not a minor detail. A poor fit can leave you uncomfortable or cold for the entire swim.

Silfra’s water clarity is the payoff. You may see far down the fissure, with some people reporting visibility of more than 50 meters. The water has a clean, glass-like quality, and the sensation is less like ordinary beach snorkeling and more like drifting through a narrow underwater canyon.

There is not much marine life to look for. The attraction is the rock, the water, and the strange feeling of floating through a geological boundary. You can drink the water, though swallowing water is hardly the main reason to bring a snorkel.

The swim itself may be shorter than you expect. Much of the Silfra time goes into changing, fitting the dry suit, receiving safety instructions, and walking to the entry point. That preparation is necessary, but it can make the actual time in the water feel brief for the price.

Cold water, dry suits, and the gear question

Silfra is cold. The dry suit usually keeps your torso reasonably protected, but your hands and face are exposed, and cold can reach your arms or feet if the suit or underlayers do not work well. In January, frozen or stiff suits can make dressing harder, and standing around before entering the water may be unpleasant.

You need to help yourself here. Wear thermal underwear or other warm base layers, thick socks, gloves, and a hat. Bring a towel and a complete change of clothing. Do not count on the suit alone to keep you comfortable.

Equipment quality has been uneven. Some people have had well-fitting suits and a warm, enjoyable swim. Others have encountered wet undergarments, missing zippers, worn equipment, or a leaking dry suit. One useful piece of advice is to insist politely on a proper fit before leaving the changing area. A suit that is clearly too large or damaged should be addressed immediately.

This is also a safety issue, not just a comfort issue. If water enters a dry suit, you may become very cold. Tell the staff at once if a suit leaks or if you lose feeling in your hands or arms. Guides such as Kevin, Siggy, and Taz have been praised for patient instruction and close attention, but the quality of the experience can depend heavily on the particular guide and the day’s organization.

Your mask cannot fit over ordinary glasses. Use contact lenses or bring your own prescription mask if you have one. You must be able to swim, weigh between 45 and 120 kilograms, and be between 150 and 200 centimeters tall.

You also need to read the Silfra handbook before booking. Some medical conditions, including asthma, diabetes, and high blood pressure, may require signed medical clearance from a doctor. Certain conditions prevent participation, and pregnant women cannot join the snorkeling section because cold water could enter the suit.

Photos, hot chocolate, and the small extras

Underwater photos are included, which is a real plus. Silfra is difficult to photograph yourself because of the gear and the need to stay with your group, so guide-taken pictures give you a way to remember the experience without handling a camera.

Still, do not treat the photo service as guaranteed perfection. Guides may be busy managing safety and group movement, and a few people have received no photos. If photos matter greatly to you, ask the snorkeling staff how they handle them before entering the water. Stay visible to the guide and follow the group closely.

Hot chocolate and cookies come after snorkeling. This sounds modest, but it is exactly the right kind of extra after cold-water activity. It gives you something warm while you change and get your body temperature back up.

Who will enjoy this most?

I would recommend this combo to you if you have limited time in Iceland and want two active, unusual experiences in one day. It works especially well for adventurous families with children 12 and older, couples, and adults who enjoy geology, caves, and physical activity more than standard sightseeing.

You should think twice if you dislike tight clothing, cold water, enclosed spaces, or long transfer days. It is also not ideal if you need a relaxed schedule with predictable breaks. The cave requires moderate fitness, and the snorkeling demands swimming ability, patience during the gear fitting, and comfort with being guided in cold water.

Older participants can enjoy both parts, but the cave can be demanding, and the dry suit is hard work to put on. If you have a medical condition, deal with the clearance question before paying.

How to make the day run better

A few simple choices can improve your odds of a good outing:

• Confirm every meeting time: The lava tunnel and Silfra portions may be separate operations. Make sure you know where and when to meet the second group.
• Bring lunch: You may be able to buy food, but a packed meal gives you control during an uncertain transition.
• Arrive early: If you drive yourself, arrive at least 15 minutes before the cave start. If you use pickup, be ready at the selected Reykjavík point.
• Check the dry suit carefully: Ask for another size if the suit is too loose, damaged, or uncomfortable before entering the water.
• Keep warm while waiting: Put on your spare layers and dry socks as soon as possible after snorkeling.
• Stay with your guide: Confusion can occur in the water, so follow the guide’s pace and route.

The tour has free cancellation if you cancel at least 24 hours before the start time. Changes made within 24 hours are not accepted, and a weather cancellation brings either another date or a full refund.

Should you book the Silfra and lava tunnel combo?

Book it if you want maximum variety and you are happy to trade some schedule comfort for two memorable Iceland activities. The lava tunnel gives you an active underground experience, while Silfra delivers the day’s most unusual visual moment: clear water and exposed rock between tectonic plates.

Book the activities separately if you want more control, if a long wait would frustrate you, or if Silfra is your only priority. Before committing, check your medical eligibility, height and weight requirements, swimming ability, and willingness to wear a tight dry suit in cold water.

My call: this is a strong choice for an adventurous first visit to Iceland, but go in with realistic expectations. The experiences themselves can be excellent. The weak points are coordination, waiting, and inconsistent gear fitting. Pack well, confirm the handoffs, and speak up about equipment before you enter the water.

FAQ

How long does the tour last?

The full experience lasts approximately 10 hours.

Where does the tour start?

The listed start point is Raufarhólshellir 816, Iceland. If you select Reykjavík transport, pickup is available from a listed meeting point near your accommodation.

Is Reykjavík pickup included?

Reykjavík pickup and drop-off are optional. The pickup process can take up to 30 minutes, so you should be at your selected meeting point at the tour start time.

What equipment is provided?

All necessary caving and snorkeling gear is provided. You should still bring warm base layers, thermal underwear, thick socks, gloves, a hat, good hiking shoes, a towel, and spare clothing.

Is lunch included?

No. You can bring a packed lunch or purchase food at designated stops.

What are the age requirements?

The minimum age is 12. Anyone under 18 must be accompanied by a parent or adult guardian booked on the same tour.

Do I need to know how to swim?

Yes. Participants must be able to swim.

Are there height and weight limits?

Yes. The weight limit is 45 to 120 kilograms, and the height limit is 150 to 200 centimeters.

Can I wear glasses while snorkeling?

The snorkeling masks cannot accommodate glasses. You should arrange to use contact lenses or bring your own prescription mask.

Can pregnant women participate?

Pregnant women cannot participate in the snorkeling portion because cold water could enter the dry suit.

What happens if the weather cancels the tour?

If poor weather causes a cancellation, you will be offered another date or a full refund. You can cancel for a full refund up to 24 hours before the experience starts.