What is the Blue Lagoon?
The Blue Lagoon is a geothermal spa in a lava field on the Reykjanes Peninsula. Its milky-blue seawater, rich in silica, algae and minerals, comes from the neighbouring Svartsengi power plant at around 37-40°C. It's Iceland's most famous attraction, and many visitors stop here on the way to or from Keflavík Airport.
Inside, you'll find the main lagoon, an in-water bar, a silica mask bar, saunas, steam rooms, a waterfall, and the Lava restaurant. The separate Retreat Spa and Retreat Lagoon are a much more expensive, quieter luxury option.
Tickets: Comfort vs Premium
Prices vary by date and slot, with the most popular times costing more. Book on the official site, or through a tour or bus company, but make sure the slot is included.
Is Premium worth it?
For most people, no. Comfort includes the experience that matters. Premium is worth it if you're going in cold weather (the robe and slippers help) or want the restaurant table.
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Volcanic activity and closures
The Reykjanes Peninsula has had a series of eruptions near Grindavík, a few kilometres away, since late 2023. The Blue Lagoon has closed temporarily several times, sometimes at very short notice, and reopened once the authorities' hazard assessment allowed. The lava hasn't reached the lagoon, which is protected by defensive barriers.
- Check the Blue Lagoon's own status updates on the morning of your visit.
- Check SafeTravel.is and the Icelandic Met Office for current alerts.
- If the lagoon closes, bookings are normally moved or refunded. Check the terms when you book.
How busy is it?
Timed slots stop it from getting packed, but the lagoon is busy at popular times, especially at the mask and drinks bars. The arrivals of airport transfers and tour buses create waves.
Crowds by day and time
From the typical weekly visitor pattern for Blue Lagoon, based on Google’s popular-times data.
Quietest time
Monday, 8-10 am
Busiest time
Saturday, 12-9 pm
How to beat the crowds
- Book the first slot, or an evening slot.
- Shower quickly (it's required) and head straight out.
- Go to the mask bar first, before the queue builds.
- Swim to the far corners, which are always quieter than the entrance area.
- Arrive close to your slot time: you can't enter early.
Getting there
Luggage storage is available at the entrance for a small fee, which is handy if you're going straight from the airport.
Practical tips
- Shower without your swimsuit before entering: it's required in Iceland.
- Put lots of conditioner in your hair and avoid getting it wet, as the silica makes it stiff.
- Take off jewellery, especially silver.
- Drink water: the warm water is dehydrating.
- Use a waterproof phone pouch if you want photos.
Alternatives
If the Blue Lagoon is sold out, closed or too expensive, the Sky Lagoon near Reykjavík has an ocean-edge infinity pool and a seven-step ritual. The Secret Lagoon in Flúðir and the Fontana spa at Laugarvatn are cheaper stops on a Golden Circle day.
Mistakes to avoid
- Turning up without a booking: walk-ins are rarely possible.
- Getting your hair soaked: the silica leaves it stiff for days.
- Wearing silver jewellery, which can tarnish.
- Booking a tight airport connection: allow time for showers, changing and the bus.
- Skipping the status check when there's volcanic activity on the Reykjanes Peninsula.
Is the Blue Lagoon worth it?
Yes, once, especially on the way to or from the airport. It's expensive and touristy, but the setting in a black lava field is genuinely unlike anywhere else. An early or evening slot makes a big difference.
FAQs
How much is the Blue Lagoon?
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Comfort starts around ISK 12,000-13,500 for adults, and Premium is about ISK 3,000 more. Prices vary by date and slot.
Do I need to book the Blue Lagoon in advance?
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Yes, all visits need a pre-booked time slot.
Is the Blue Lagoon open after the eruptions?
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It has reopened after each closure, but closures can happen at short notice. Check the official site and SafeTravel.is on the day.
Can children go to the Blue Lagoon?
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Yes, from age 2. Under-2s aren't allowed in the water.
How long should I stay?
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2-3 hours.
When is the Blue Lagoon least crowded?
Heading to Blue Lagoon?
See how busy it is right now and the quietest hours for your date, then walk in when the line is short.
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How we research: every guide is written by the BeatTheCrowd team from official sources and recent traveller reports, cross-checked against each other, and dated so you know how fresh it is. Last checked 29 October 2026. Prices and rules change, so always confirm on the official site before you book.
