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Snorkeling Tour in Silfra

Thingvellir, Iceland
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icon2 hours  (Approx.)
Mobile ticket
iconOffered in: English and 2 more


Snorkel in the crystal-clear glacial waters of the Silfra fissure in Thingvellir National Park on this 4-hour experience from Reykjavik. Don the supplied snorkeling gear and swim between the continental plates submerged in the fissure. Admire the multicolored rocks and water clarity, and follow your guide to swim around Silfra’s highlights. Post-snorkel hot chocolate, cookies and entrance fees are included.
  • 4-hour Silfra ravine snorkeling trip from Reykjavik
  • Snorkel through the crystal waters and continental plates of the Silfra fissure
  • Drift through the Silfra Big Crack, Cathedral, Hall, and Lagoon
  • Enjoy hot chocolate and cookies after your snorkel
  • Use of snorkeling equipment included
  • Includes entrance fees
  • Choice of morning or afternoon departure during summer
National Park fees
Photos of your snorkeling tour
Professional guide
Use of snorkeling equipment
Hotel pickup and drop-off

Departure Point

Your centrally located accommodation in the Reykjavik area

Departure Time

Morning Tours starts at the meeting point in the Silfra car par, in Thingvellir National Park
Summer: 10:00am ( 01.03.18 - 31.10.18 )  Winter: 11:00am ( 01.11.18 - 28.02.19 )
Afternoon tour starts at 2 pm with meeting point at the Silfra car park in Thingvellir National Park. 
Summer: ( 01.03.18 - 31.10.18 )

Return Details

Returns to original departure point
Your snorkeling destination is Silfra, an underwater ravine near Lake Thingvallavtan, located inside UNESCO-listed Thingvellir.

This freshwater gorge is formed from a crack in the Earth’s crust where the world's continental Eurasian and North American tectonic plates lie a short distance apart. The ravine water is estimated to be 1,000-year-old glacial water from Iceland’s second-biggest glacier, Langjökull, and takes about 30 years to filter through the lava rock, making it incredibly clear.

On arrival at Silfra, change into the provided warm undergarment and drysuit. Next, don the supplied face mask, snorkel, and fins, and listen to a comprehensive safety briefing and instructions. Then, with a guide showing the way, descend into the crystal-clear waters for a 30- to 40-minute expedition.

Admire the electric blues of the water and multicolored rock formations, and follow your guide through the four main areas. Swim through the Silfra Big Crack where the continental plates almost touch each other, and soak in the majesty of Silfra Cathedral, Hall, and Lagoon. The water clarity is such that visibility can extend to 328 to 492 feet (100 to 150 meters). Your guide will take photos on route that will be available for downloading free of charge after your tour.

When it’s time, leave the water, change back into your everyday clothes, and savor hot chocolate and cookies. Your tour then concludes either when you leave Silfra independently, or enjoy a return transfer and drop-off at the original start point in Reykjavik.
Stop At:  
Thingvellir National Park
Admission Ticket Included
Stop At:  
Iceland Adventure Tours
Admission Ticket Free
  • Confirmation will be received at time of booking
  • No heart problems or other serious medical conditions
  • Not recommended for pregnant travelers
  • Be able to swim and be comfortable in the water
  • Be at least 150 cm (4’11”) tall
  • Be at least 45 kg (99 lbs)
  • Be physically fit
  • Be ready to wear sometimes tights and constricting dry suit
  • Minimum age 14 years old
  • This tour/activity will have a maximum of 6 travelers
  • OPERATED BY Iceland Adventure Tours

For a full refund, cancel at least 24 hours in advance of the start date of the experience.

  • This experience requires good weather. If it’s canceled due to poor weather, you’ll be offered a different date or a full refund.

Learn more about cancellations.

The answers provided below are based on answers previously given by the tour provider to customers’ questions.
What is the maximum group size during Snorkeling Tour in Silfra?
This activity will have a maximum of 6 travelers.

See all safety measures taken by Snorkeling Tour in Silfra.

Traveler Photos

Traveler Tips

  • "I'd recommend bringing a change of clothes in case you get wet a towel, but no need for a bathing suit." See review
  • "You have to get dressed into your suits outside in the parking lot and in the winter its cold outside." See review
  • "I highly recommend trying this - especially if you are a first time snorkeler - the dry suit maintains your buoyancy on the water and makes the 40 minute swim very manageable." See review


211 Reviews
2 stars
Reviews by Viator travelers
Showing 1-10 of 211 reviews
Lovely experience, well worth doing if...
Test t
, Oct 2018
Lovely experience, well worth doing if you're in Iceland, its such an experience, the experience takes about 30 minutes in the water, but there is a lot of time out of the water getting used to your equipment, which is important! I'd recommend bringing a change of clothes in case you get wet a towel, but no need for a bathing suit. Thanks again!
Great Experience
, Sep 2018
My husband and I were so happy we chose to do this tour. The water was not as cold as expected in September, but we are used to cold water being from Cape Cod/Boston. Great tour guides. Only issue was the line getting into the water because there were so many tours happening.
it was a cool experience but this was...
Echo A
, Sep 2018
it was a cool experience but this was the wrong season to go.
Cool experience
, Aug 2018
We enjoyed our snorkeling experience. The guides were thorough and fun, They explained the process well. The water was painfully cold but the view was cool. Just walking around the park there was wonderful too.
Amazing experience.
, Aug 2018
This was a fabulous experience. I had never snorkeled before and the guys were extremely helpful and patient. Don’t wear jeans as you will need to take them off, wear yoga pants or some other tight fitting pant.
Wonderful and unique adventure in Iceland!!
, Aug 2018
Snorkeling between the fissures was amazing. This was my second time to book this tour and I wasn't disappointed. All of the tour guides understand superior customer service and interacted well with all participants. They are cognizant of safety while providing a unique experience. Our guide Juan was excellent and quite the character!! Highly recommend this tour!!!
What an experience. The guides...
Mark H
, Jul 2018
What an experience. The guides settled my nerves about being cold and were very professional in making sure our suits, goggles and equipment were on properly and would not leak water. One girl was nervous in the water and the guide was so patient with her. The visibility was amazing. This was one of the best experiences We have ever had. The hot chocolate at the end was awesome. We recommend this as it really is an amazing tour.
Awesome awesome awesome experience...
, May 2018
Awesome awesome awesome experience. The diver guides were so much fun and really helpful. It was honestly an indescribable sight snorkeling the fissure. The guides even had GoPros to take pictures of us in the water. I was a solo traveler but felt very comfortable and made friends in the small group. Highly recommend to anyone visiting Iceland.
This tour was the best experience I...
Mayra M
, Feb 2018
This tour was the best experience I had in Iceland and is in my top life experiences. Water obviously is freezing, but the dry suit keeps your body warm. You forget about the cold once you get in! 100% recommend this tour! Tour guides Miguel and Ivan get A+! Had so much fun with them and the group!
Nice experience, but it was more...
, Jan 2018
Nice experience, but it was more work than it was worth. You have to get dressed into your suits outside in the parking lot and in the winter its cold outside. It takes a while to completely get dressed into the gear. The gear is tight around your neck, i found it a little hard to breathe. Once your in the water it is not cold and the view is pretty. 30 mins is plenty of time in the water. After you get out you need to walk back to the van. This a cold walk and your gear is heavy. Expect your hands to be frozen after you get out of the water. but after you get back into your clothes and get gloves on you will warm up.

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