Blue Lagoon Iceland: Everything You Need to Know Before You Book

The Blue Lagoon is Iceland's most visited attraction and the one that most divides opinion between first-time visitors and experienced Iceland travellers. For first-timers, the experience of soaking in 38-40°C silica-rich geothermal water in a dramatic lava field landscape, applying mineral-rich mud masks and surrounded by steam rising against the sky, is genuinely extraordinary — unlike anything available in most parts of the world. For repeat Iceland visitors, the Blue Lagoon's crowds, prices and increasingly commercial atmosphere represent everything that distinguishes tourist Iceland from the authentic version. Both perspectives are valid. This is what you need to know before booking.

The Basics

The Blue Lagoon is a geothermal spa located 20 minutes from Keflavik Airport on the Reykjanes Peninsula. The milky turquoise water is heated by the adjacent Svartsengi geothermal power plant and maintains a temperature of 37 to 40°C year-round. The distinctive colour comes from silica that precipitates out of the water and remains suspended. The same silica is offered as a face mask to all visitors. The entire facility — lagoon, viewing platforms, restaurant, spa treatment rooms — is architecturally designed and exceptionally well-maintained.

Packages and Prices

Entry is available in three tiers. Comfort (from approximately GBP 78): entry, silica mud mask, algae mask, towel and use of facilities. Premium (from GBP 110): adds a drink at the in-water bar, bathrobe, and extra mask. Retreat (from GBP 180+): private changing suite, dedicated host, and additional treatments. The Retreat Hotel adjacent to the lagoon starts from approximately GBP 700 per night and includes private lagoon access. All entry requires advance booking — walk-ins are not permitted under any circumstances.

Is It Worth It?

For a first Iceland visit, especially if arriving via Keflavik Airport: yes. The proximity to the airport (logical stop on first or last day), the quality of the facility, and the uniqueness of the experience justify the price as a once-visit activity. For a repeat Iceland visit with limited time: consider Sky Lagoon in Reykjavik (comparable experience, lower price, no booking requirement months ahead) or the Secret Lagoon in Fludir (authentic, inexpensive, uncrowded). For travellers who have experienced natural geothermal springs at Landmannalaugar or the Myvatn Nature Baths, the Blue Lagoon's commercial environment may feel jarring by comparison.

Practical Notes

Book via bluelagoon.com as far in advance as possible — peak summer slots sell out months ahead. Silicone is provided for hair protection (the silica will damage hair if left in contact for extended periods — use the provided conditioner and the silicone cap for long hair). Jewellery should be removed — the silica will discolour metal. The locker and changing room system is efficient and clearly signposted.

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