Snorkel between two continents

Silfra Snorkeling

Iceland · Þingvellir National Park

Silfra is a crystal-clear glacial fissure in Þingvellir National Park where the North American and Eurasian tectonic plates meet. You can literally snorkel or dive between two continents, in some of the clearest natural water on Earth — visibility regularly exceeds 100 meters.

entry Fee

Tour required (€140–200)

time Needed

3–4 hours total (45 min in water)

best Season

Year-round

difficulty

Easy (snorkel) / Open Water cert required (dive)

parking

Free at Þingvellir P5 lot

water Temp

2–4°C year-round

visibility

Over 100 meters

Why Visit

What makes it special

Silfra is the only place in the world where you can swim directly in the crack between two tectonic plates. The water is glacial meltwater that has been filtered through volcanic rock for 30–100 years, making it some of the purest water on Earth — drinkable straight from the fissure.

Best Time to Go

When to visit

Silfra runs year-round and the water temperature stays the same (2–4°C). Summer means more daylight and easier logistics; winter means snowy surroundings and fewer crowds.

Summer (June–August): warmest air, longest days, busiest — book 2–4 weeks ahead.
Shoulder season (May, September): great balance of weather and lower prices.
Winter: dramatic snowy surroundings, far fewer tourists, but cold dry-suit transitions.
Morning tours have the best underwater light when sun reaches into the fissure.

How to Get There

Getting there

Silfra is about 50 km from Reykjavík, inside Þingvellir National Park — usually combined with the Golden Circle route.

Drive 45–50 minutes from Reykjavík on Route 36 toward Þingvellir.
Follow signs to Þingvellir P5 (the dedicated Silfra parking).
Most tours start at the P5 car park — your operator will direct you exactly where to meet.
You cannot snorkel or dive Silfra without a certified guide — there are no self-guided options.

Practical Tips

Know before you go

Book in advance

Silfra tours sell out 2–4 weeks ahead in summer. Top operators: Dive.is, Arctic Adventures, Troll Expeditions.

Wear thermal base layers

Under your dry suit you'll wear a thick fleece undersuit, but bring warm base layers and wool socks.

Eat before, not after

You'll be cold for an hour after. Most tours include hot chocolate at the end. A real meal before keeps your core temperature up.

Snorkel vs. dive

Snorkeling is open to anyone 12+ who can swim. Diving requires Open Water certification AND proof of dry-suit dives in the last 2 years.

Combine with the Golden Circle

Silfra is inside Þingvellir, the first stop on the Golden Circle. A morning Silfra tour pairs perfectly with Geysir and Gullfoss in the afternoon.

Photo Tips

Taking the shot

Bring a GoPro or any waterproof camera — most tours allow you to use your own.
The 'cathedral' section near the end has the best 100m+ visibility shots.
Midday tours (10:00–13:00) get the most light penetration into the fissure.
Snowy winter scenes above the water are striking — pack a regular camera for surface shots.

FAQ

Frequently asked

Do I need to know how to swim?

Yes — you need to be a confident swimmer for the snorkel tour, and a certified diver for the dive. The current does most of the work, but you need to be comfortable floating face-down in open water.

How cold is the water?

2–4°C year-round, even in summer. You'll wear a dry suit that keeps your body dry; only your hands and face get exposed. Hands go numb after about 20 minutes — totally normal and harmless.

Is the water safe to drink?

Yes — it's glacial meltwater filtered through lava rock for 30–100 years. Guides often invite snorkelers to take a sip directly from the fissure during the tour.

Can I dive Silfra without a certification?

No. Diving requires Open Water certification AND proof of dry-suit diving in the last 2 years, OR a dry-suit specialty course. Snorkeling has no certification requirement.

Is Silfra worth it?

If you have an extra half-day and don't mind cold water, absolutely — there's nothing else like it in the world. Most people rank it among the highlights of their Iceland trip.

Snorkel between continents

Browse our Iceland itineraries that include Silfra and the Golden Circle.

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