Crystal clear dive in the depths of the Earth in Silfra, Iceland

Imagine being on an island in the North East Atlantic Ocean, less than 300km from the Arctic Circle. It’s 8 am, you feel the frosty wind biting the skin of your cheeks and still, you’re putting a dry suit on, hypnotised by the blue transparency of Silfra fissure water. OK? Be ready for 35 minutes of pure underwater magic…

This article is also available in French.

Thingvellir National Park: a historical and natural wonder

3 things attracted me to this famous dive spot of the Þingvellir National Park (written in English Thingvellir). First, it is a unique historical place: Þingvellir means the “Parliament fields”. The first political assembly was held here in 930. For this reason, the site is classified as UNESCO World Heritage. Þingvellir National Park features a rift valley and the largest natural lake in Iceland. It is such an amazing place that I could understand why people decided to gather there from this very early era. Even the Icelandic government chose it to celebrate the independence of the country in 1944.

Secondly, the opportunity to dive between the American and European tectonic plates sounded like such an adventure that it didn’t take me long to start preparing my trip. Finally, when I saw the first pictures of Silfra with a visibility of more than 100m, I knew I had to book my flight tickets right away. Great visibility is one of my favourite things as this is what makes you feel like you’re flying when you are diving.

Silfra fissure is on the shore of the Þingvellir Lake. It is one of the much-loved places of the people of Reykjavik for a weekend getaway as it is only 45 minutes drive (even Björk has a holiday house on the shores of this beautiful lake). Before flowing to Silfra Fissure, the water coming down from the Lángjökull Glacier is filtered for 30 to 100 years, hence its absolute transparency and incredible visibility underwater. Whenever you are thirsty during your dive, do not hesitate to take a sip – you are simply diving in mineral water! Nevertheless, do not forget the water is 2°C in the winter and 4°C at the most in summer. The advantage is thanks to the continuous flow of water, Silfra never freezes and then can be dived all year-long. Yet, you need to know that during the winter months you will need to pray for good weather, otherwise, you won’t be able to do more than one dive if you get a blizzard.

How to survive the cold of a dive in Silfra?

As you can easily understand, wearing a wetsuit is not an option here. The dry suit is the only way to go. You will add it to your usual BCD, mask and fins (which need to be adjustable if you want to dive with them for either a wet or dry suit).

Yet, do not forget that at such a low water temperature you need to be careful with the type of regulator you are using. It has to be specifically designed for such a use to avoid the first stage to freeze and then to get your regulator in free flow mode. Some regulators work for temperate waters but not necessarily for extreme cold waters, so check the specifications of your gear. Regarding your weight, do not forget it is a freshwater dive so do not hesitate to drop 2 to 3 kg off your usual weight with a dry suit.

Finally, the details which made the difference in my ability to stay warm and toasty during my dive were:

  • 3 layers of thermal undergarments
  • A pair of thermal double-layered Fourth Element socks
  • 5mm Aqua Lung dry suit gloves

My gloves made a huge difference from a comfort point of view even compared to my dives in 6°C in Scotland with my previous gloves. No water was circulating inside so my hands stayed at a normal temperature. Besides, although all my buddies were wearing 7mm mittens, I could keep my full dexterity, which was really useful to shoot pictures and videos. My hands never shook the way they did during my first extreme cold dive in Ushuaia, Argentina.

For all these reasons, I was happy I made the choice one more time to bring all my scuba gear with me. Anyway, with only 15 kg of diving equipment, dry suit and bag included, I still had spare kilos in my pre-booked hold luggage of 20 kg. I only needed a small backpack with me on the plane and I was off for a 3-day scuba weekend in Iceland.

Scuba diving in Silfra: magical contrasts in blue, black and gold

I can tell anyone now: Silfra should be at the top of your scuba bucket list. Water is freezing cold but from now, every time someone asks me the usual question “So where is your favourite place to dive?”, I will now include Iceland in my reply.

The most important moment of the dive was actually the beginning. When you put your head in the water and suddenly your eyes can’t believe what they see! The way the golden light is distributed and reflected on the rocks in such blue transparent water is nothing like I have ever seen before. Everything is emphasised by dark shadows as the sun was very bright that day, giving an even higher contrast to the rocky underwater landscape.

I had the impression during the dive of having a liquid mirror above my head, or if you prefer it was like flying over a lake, except here everything was upside down. As a result, it is a delightful playground for underwater photographers and videographers. The 100m visibility allowing to shoot from a long distance. Shots of tiny divers lost between the huge rocks of Silfra Canyon and especially the part called Cathedral make incredible images.

During the dive, you will alternate between deeper parts, no more than 15m, and very shallow paths just below the surface which link the different parts of the canyon. Scuba divers need to make sure to always control the speed of their ascent and purge their BCD and dry suit each time.

The total dive time in Silfra is approximately 30 to 35 minutes. I thoroughly recommend doing the 2 dives to fully appreciate the wonders of this fantastic scuba diving spot. The dive ends in a lagoon, where silt particles at the bottom are so thin that you should be extra careful not to get too close to it, even by frog kicking carefully with your fins.

After each dive you will have to make your way back, walking 250m to the car park with all your scuba diving equipment on so take it easy! After a dive of 30 minutes in 2°C water, you need to give your body a rest. Another tip: don’t be surprised if you need warm water to remove your gear, the water remaining on your gear such as the buckles of your BCD can instantaneously freeze because of the wind.

Watch my video “Iceland underwater & beyond” to discover amazing images of Icelandic landscapes of ice deserts and hot springs, and of my scuba diving experience in Silfra.

At the end of our diving excursion day, our dive guide took us for lunch to taste the speciality of Reykjavik: the hot dog! He was kind enough to bring my buddies and me to the best shop in town on the harbour for this well-deserved treat! I loved it so much that after a nap and tour of the city in the afternoon I had another one to finish the day.

If you want to live the same adventure, I warmly recommend you to contact The kindness and professionalism of their instructors and divemasters, the quality of the rental gear and the perfect timed organisation made my day!


Hólmaslóð 2, 101 Reykjavik


Phone: (+354) 578 6200


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scuba diving in Silfra Icelandscuba diving in Silfra Iceland

  1. I’d love to dive Silfra, but I’m a wuss and I’m not sure I can handle 2 degrees! Photos looks awesome though!


    1. Thank you! I assure you with the right dry suit and warm undersuit you’re fine underwater 🙂


  2. Wow! I’ve a couple of HK buddies who have been there. I can see why it’s become a phenomenon!


    1. Yes I have the same feeling… more and more people now become dry suit divers to enjoy this breathtaking dive!


  3. […] This article is the French version of “Crystal clear dive in the depths of the Earth in Silfra, Iceland“ […]


  4. […] to get the best glimpse of the country was just unthinkable to me. In addition to my article about scuba diving in pure transparent water between two continent in Silfra, here is a video showing some of the geothermal highlights of Iceland such as Geysir, Seltun and […]


  5. My husband and I did a dive there at the beginning of May and you are completely right – it is magical! We are seasoned cold water divers and this was, by far, the best cold water diving we have ever done. I can’t wait to go back! Check out our blog post to see some more pictures from underwater:


    1. Glad you loved it too! Very nice blog too about scuba diving in Iceland… Why don’t you come to try scuba diving in Scotland with me this summer?


  6. […] Located in the National Þingvellir Natural Park, the Silfra fissure is the geological canyon between the European and American tectonic plates. The water inside is really clear, the visibility is easily superior to 100m.The total transparency of the water really gives you the impression to fly! You can read more about scuba diving in Silfra in my blog post “Crystal clear dive in the depths of the Earth”. […]


  7. […] Scuba diver silhouette in the blue: While being a bit deeper than the other divers in your group, you look toward the surface with a bright sun shining. Of course this works better with really good visibility. My best experience of taking this type of pictures were in Turkey and in Iceland. […]


  8. […] Scuba diver silhouette in the blue: While being a bit deeper than the other divers in your group, you look toward the surface with a bright sun shining. Of course this works better with optimum visibility. My best experiences of taking this type of picture were in Turkey and in Iceland. […]


  9. […] of this dive! Diving in this pure fresh water was amazing, reminding me of the Cenotes in Mexico or Silfra in Iceland.  I was lucky enough to have a beautiful sunshine that created incredible lights effects […]


  10. […] the opportunity to practice it for the first time while diving the Cenotes in Mexico and then at Silfra in Iceland. I knew how to use it. It’s a movement close to the one you use when you swim breaststroke. I […]


  11. […] looking forward to the next opportunity in the Alps for more altitude ice diving but there is also Iceland, Norway and Canada! In the mean time you can also discover this adventure in video : Snow shoes […]


  12. […] a bit with my buoyancy at the beginning of the dive. My other point of comparison was when I dived Silfra, Iceland, with my Blizzard drysuit, same gloves and same regulator, and I was perfectly fine. The result? […]


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