Snorkeling in Silfra (Þingvellir National Park)


Float between two continental plates in the bluest and clearest water you’ll ever see. A must-do during your Iceland visit in any season.

You don’t need to be a certified diver to enjoy this amazing tour at Þingvellir National Park but you need to be comfortable in water and open to seeing something spectacular.

Because of the nature of this tour, you need to be in good physical condition to participate in it and sign the mandatory Snorkeling in Silfra Medical Release form. Please find more info in the tab below.



Arrival in Þingvellir

Upon arrival, your guide will assist you with your dry suit and snorkeling equipment to ensure that you will be warm and comfortable during your tour. Each guide will take care of 8 snorkelers once in the water.

The Snorkeling Experience

Medical release form

Please note: All snorkeling participants must read and sign the “Snorkeling Silfra Medical Statement” and, if necessary, follow the directions regarding a doctor’s clearance for the tour.

During your snorkel, you will explore the four main parts of Silfra: Big Crack, Silfra Hall, Silfra Cathedral and the Silfra Lagoon.

You will float through Big Crack, Silfra’s narrowest section and where the continental plates are so close you can almost touch them. The fissure then widens into Silfra Hall. Here the full spectrum of Silfra’s colours and clarity become all the more apparent. At this point, if you look at just the right angle you can see all the way to Thingvallavatn, over 150m away. Near to the opening to Thingvallavatn you will enter the Silfra Cathedral; as the depth reaches 23m you feel like you are flying over the boulders and glacial silt. Your snorkel will finish in the Silfra Lagoon.

Transfer from Reykjavík

This tour can be booked with a transfer from Reykjavík at an additional cost. To book that, you need to select “Snorkeling Silfra with Pick Up” in the booking engine. The additional fee for the pickup will then be automatically added to your booking.

Once you make your booking you will get detailed instructions about where and when to meet your guides if you decide to use your own transportation. 


The Fine Print


  • Up to 48 hours prior to the tour departure time, 90% will be refunded.
  • Within 48 hours of the tour departure time, no refund is available.

Please see here for our full terms and conditions

Snorkeling Silfra Medical Statement

Please read carefully

Snorkeling in Silfra is a demanding activity that can lead to overexertion and exhaustion. It is also important to understand that exposure to near freezing point glacial melting water includes potential hazards. To minimize the risks involved in this activity, our partner requests that every potential participant reads and fills out this form which contents are as follows:

Please be aware that there have been serious incidents at Silfra involving participants in the medical risk groups identified in this release. This form is to be taken seriously and a full YES or NO answer must be given to each of the medical conditions listed on the right-hand side.

Please be aware of the following conditions related to snorkeling in Silfra:

  • Participants wear a tight and constricting full body suit. The suit is heavy and may make walking difficult.
  • Because of the geographical layout of Silfra, participants must walk in full gear about 150 meters to the entry point and later 350 meters from the exit stairs back to where the tour started.
  • The suit has seals on the neck and wrists that stop water from getting in. These can be tight and sometimes an additional rubber strap needs to be worn around the neck.
  • In-water duration is 30-40 minutes and the water temperature is 2 Celsius. For this reason, participants should have eaten breakfast or lunch before the activity starts.
  • Participants wear a neoprene hood and semi-dry neoprene gloves. This means that the heads and hands are exposed to the water. Part of the face will not be covered by the hood and therefore be in direct contact with the water.
  • There is a slight current in Silfra and participants must be comfortable swimming against it during the last part of the tour.
  • Whenever entering the water there is a small chance of the suit leaking. In this case, 2 degrees Celsius water will enter the suit and the water will be in direct contact with your thermal underlayers and skin. Please bring a second set of the clothes you plan to wear under the dry suit (dry underwear/leggings/long sleeve shirt or skiing underwear).
  • Participants use a snorkel to breathe throughout the activity. This is a breathing tube with one end in the water and the other in the air.
  • Silfra is situated in the Þingvellir national park. This is a UNESCO World Heritage Area and new constructions are not allowed. This means that participants change in our tour vans in potentially wet, windy, and cold weather conditions. In winter, outside temperatures in Iceland may be far below the freezing point.
  • Participants should bring adequate thermal protection for the time before and after wearing a dry suit and keep in mind that the weather in Iceland may change within minutes. Make sure to have a hat and gloves along during winter!
  • Participants cannot wear most types of jewelry in the water. Please leave accessories not needed on tour at your accommodation so that they do not get lost.

The following conditions, unfortunately, exclude you from participating in this tour. Please understand that this is for your own safety!

  • Inability to perform moderate exercise (walk 1 mile/1.6 km within 12 minutes)
  • Pregnancy
  • Any form of lung disease
  • Pneumothorax (collapsed lung), other chest disease or chest surgery
  • Head injury with loss of consciousness in the past five years
  • Any kind of heart disease, heart surgery or heart attack
  • Thrombocytopenia or other blood disorders
  • Colostomy or ileostomy
  • Epilepsy or conditions resulting in sudden unconsciousness

If any of the following applies to you, you need to get medical clearance from a doctor in order to participate in the tour.

  • Are you currently taking any prescription medication?
  • Currently or recently under any kind of medical care (last 12 month)?
  • High cholesterol level? High blood pressure or taking medicine to control blood pressure?
  • Diabetes, mellitus, even if controlled by diet alone?
  • Asthma, or wheezing with breathing or wheezing with exercise?
  • Behavioral or mental health problems (panic, fear of closed/open spaces)?
  • Dysentery or dehydration?
  • Back, arm or leg problems following surgery, injury or fracture?
  • Ulcer or ulcer surgery?
  • Recreational drug use or treatment for Alcoholism in the past 5 years?
  • Raynaud’s syndrome?
  • Vertigo/dizziness?
  • Cancer?
  • Older than 60 years (the age limit for Silfra tours is 65)?

You can download the medical release form here.

Failure in complying with these conditions may result in the guides refusing you participation. In such cases, no refunds are given.

Partner Tours

This tour is a Partner Tour

What this means is that this tour is not operated by I Heart Reykjavík but one of our trusted partners that we have carefully chosen to help you get the most of your stay in Iceland.

We are very selective with the companies we choose to work with because we want you to have the best experience possible during your Iceland adventure. We would never recommend anything to you that we wouldn’t recommend to our own family and friends.

Comments from previous guests

“Iceland at its best”

So beautiful, raw nature, meditative and calm. Sure it was cold but that is no problem because this is definitely one of my best experiences I had in Iceland. Walking through snow to get to the water was also surreal. Thanks to Felix, Ted and Louis for there professionalism and true enjoyment of their job! Would recommend this activity to everyone.
Nic P
Wahroonga / Australia
“An Awesome Experience”

Coming to Iceland, I imagined doing numerous hikes, chilling in hot springs and photographing northern lights. I never thought I would go snorkelling, especially in winter. Having said that, I am so incredibly glad we got the chance to do it with and have Felix, Ted, Michál and Ásgeir as our instructors. They are truly an awesome bunch and extremely professional in their work. This was my first time snorkelling and I couldn't have asked for a more helpful staff. They made us all feel comfortable, explained everything in detail and we truly had a great time. Clear water, beautiful views, some hot chocolate to warm up and fun people around you - what else can you ask for?
Madli P
“Snorkeling Silfra”

Great experience with during a recent snorkeling trip to the Silfra Fissure. We were picked up at our hotel right on time and had an entertaining ride out to the snorkeling site. Our guides, Reynar and Michael, were friendly, funny and filled us in on lots of local info as we drive to the destination. Once we got to Silfra those process of suiting up began. It took well over an hour to get everyone in the group geared up - add to this that it was pouring rain - yet all the while Reynar and Michael worked diligently (ensuring that everyone was safely suited up) and kept the group laughing. The snorkeling was phenomenal (and yes, cold) but it is a once-in-a-lifetime experience we are glad to have had. Would highly recommend based on the professionalism and excellent attitudes of our guides.

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