Complete Guide to Iceland's Silfra Fissure

Silfra Fissure is the only place on Earth where you can float or drift in the water between two continents. Located in Þingvellir (Thingvellir) National Park, it lies within a submerged rift between the North American and Eurasian tectonic plates.

Fed by the Langjökull ice cap, Silfra's water is filtered through porous lava fields, giving it visibility of more than 100 m (328 ft). Temperatures remain a steady 2–4°C (35–39°F) year-round, so you can snorkel and dive here in every season.

Here are the most important things to know about Silfra before you visit.

• Silfra is a freshwater fissure in the rift valley of UNESCO-listed Thingvellir National Park in Iceland.

• Earthquakes in 1789 widened fissures in the area and helped shape the Silfra seen today.

• Filtered glacial water provides visibility of more than 100 m (328 ft).

• Silfra lies on Iceland’s Golden Circle route, about 53 km (33 mi) from Reykjavík.

• The fissure has four main sections: Big Crack, Silfra Hall, Silfra Cathedral, and Silfra Lagoon. 

• Snorkeling and diving are the best ways to experience Silfra’s underwater landscape.

One of Iceland's best-known dive sites, Silfra allows certified dry suit divers to explore depths up to 18 m (59 ft). The underwater route is divided into four main sections:

• Big Crack: the narrowest point of the route, where the two tectonic plates come closest together.
• Silfra Hall: a wider section filled with large lava rocks beneath the surface.
• Silfra Cathedral: the deepest section of the route, reaching about 20 m (66 ft) below you.
• Silfra Lagoon: a shallow, calm area where the route ends.

To dive in Silfra, you'll need a valid dry suit certification or written proof of dry suit experience. Arctic Adventures operates under strict international safety standards, providing expert guidance and specialized gear for a secure Silfra diving exploration.

Silfra’s volcanic geology, glowing aquatic colors, and unmatched clarity make it a true diver’s paradise.

Silfra is worth visiting year-round because the water conditions stay remarkably consistent, while daylight, weather, visitor numbers, and the landscape around Þingvellir National Park change with the seasons. The water remains around 2–4°C (35–39°F) throughout the year, so the main differences are what you experience before and after entering the fissure.

• Spring, March to May: Air temperatures typically rise from around 0 to 7°C (32 to 45°F) as the season progresses. Daylight increases quickly, snow begins to recede, and conditions above the water become milder. Spring gives you longer days for combining Silfra with other stops around Þingvellir and the Golden Circle, without the busiest summer period.
• Summer, June to August: Daytime temperatures are often around 10–13°C (50–55°F), with the longest daylight hours of the year. Milder air makes gearing up and changing afterward more comfortable, while brighter conditions can bring more light into the fissure and highlight the blue water and green algae. Long days also make it easy to combine Silfra with a full day around the Golden Circle.
• Autumn, September to November: Air temperatures gradually fall from around 8–10°C (46–50°F) in early autumn to around 1–4°C (34–39°F) later in the season. Visitor numbers begin to drop, while autumn colors appear around Þingvellir before colder conditions arrive. Earlier in the season, you still have plenty of daylight for other stops before or after your Silfra tour.
• Winter, December to February: Air temperatures are often around 0°C (32°F), sometimes dropping below freezing, while Silfra’s water remains at 2–4°C (35–39°F). Snow and frost can cover the surrounding lava fields, and earlier departures are more practical during the darkest months, leaving more daylight for other Icelandic winter activities afterward. Lower visitor numbers can also mean a quieter visit to Þingvellir National Park.

You have 3 practical options: stay 20–45 minutes from Silfra, camp inside Þingvellir National Park, or visit on a day trip from Reykjavík, 53 km (33 mi) away. Staying nearby is especially useful in winter, when early tour times help you make the most of limited daylight and avoid a very early drive from Reykjavík. In summer, the long daylight hours make early departures much easier to manage.

The best places to stay near Silfra are around Þingvellir National Park, Laugarvatn lake, and the wider Golden Circle. Options range from hotels and guesthouses to private cottages, with most of the properties below around 20–45 minutes from Silfra.

Here are some of the best Silfra accommodation options: 

Hotels near Thingvellir 

• ION Adventure Hotel: Upscale and modern hotel with a spa and restaurant. Located about a 30-minute drive from Silfra. 

• Brú Hotel: Comfortable, cozy, and affordable hotel located approximately a 28-minute drive from the fissure. 

• Hotel Grímsborgir: A luxury hotel near Selfoss (Grímsnes), about 33 minutes from Silfra, great for combining Golden Circle stays.

Guesthouses and Hostels 

• Héraðsskólinn Boutique Hostel: Stylish and historic guesthouse, located in Laugarvatn, about 30 minutes from Silfra. 

• Hótel Laugarvatn: Welcoming stay with lake views and geothermal baths nearby, about 30 minutes from the fissure. 

• Selfoss Hostel: Nature-inspired lodging with a warm, homey atmosphere and a strong focus on guest hospitality. Around a 45-minute drive from Silfra. 

Cabins and Cottages 

• Þingvellir Lake Cottage: Private, scenic cottage accommodation steps away from the park and about 22 minutes from the fissure. 

• Austurey Cottages: Lakefront cabins with minimalist design, a 35-minute drive from Silfra.

The main camping options near Silfra are inside Þingvellir National Park. The park has 4 campsite areas: Nyrðri-Leirar, Syðri-Leirar, Fagrabrekka, and Vatnskot. Nyrðri-Leirar, Syðri-Leirar, and Fagrabrekka are grouped around the Leirar service area, while Vatnskot sits farther south by Lake Þingvallavatn.

The main camping season is from June 1 to September 15. During summer, all 4 campsite areas are generally open. Electricity for motorhomes is available at Nyrðri-Leirar and Syðri-Leirar, while Fagrabrekka and Vatnskot are for tents only. Toilets, showers, outdoor sinks, picnic tables, and other basic facilities are available depending on the campsite.

From September 16 to May 31, Nyrðri-Leirar remains open for winter camping. Toilets, showers, and laundry facilities stay available, although outdoor sinks are closed and parts of the campsite may close during heavy snow or thawing conditions.

Camping fees are 1,800 ISK (US$15 / €13) per adult per night and 900 ISK (US$7 / €6) for seniors and people with disabilities. Electricity costs 1,100 ISK (US$9 / €8) per unit, and an accommodation tax of 400 ISK (US$3 / €3) per unit also applies.

Prices and currency conversions checked in September 2026.

Silfra is surrounded by some of Iceland’s best-loved natural and cultural landmarks. Many of these attractions are part of the Golden Circle route and are easily accessible on a day trip from Reykjavík.   

• Þingvellir National Park: The birthplace of Iceland’s first parliament and a rift valley where tectonic plates separate. 

• Gullfoss waterfall: A powerful two-tiered waterfall, which plunges into a deep canyon on the Hvítá river. 

• Geysir Hot Springs Area: Geothermal field with steam vents, bubbling mud pools, sulfur-rich soil, and Strokkur geyser, which erupts every few minutes. 

• Öxarárfoss: A picturesque waterfall within Þingvellir National Park. Öxarárfoss waterfall is easily reached by a walking path.

• Lake Þingvallavatn: Iceland’s largest natural lake, known for its clear waters and volcanic origins. Lake Thingvallavatn is a peaceful spot for kayaking, fishing, or birdwatching.