Almost everything written in English about Iceland’s lagoons is somebody’s account of their own afternoon. Enjoyable, and not checkable. This guide takes the opposite approach: we read what the venues publish themselves — the guest information, the terms, the city’s conduct rules — and report what is actually required, with the source named every time.
We have not been to these venues. We say so on every page. What we offer instead is a set of facts you can check in five minutes, and which turn out to differ from the received wisdom more often than you would expect — including the one about your hair.
Start here
Iceland pool shower rules: what each venue requires — the rule that surprises visitors most, quoted venue by venue. Yes, you shower without a swimsuit. What differs is whether there is a door on the cubicle, and that is worth knowing before you arrive rather than after.
Choosing between them
- Blue Lagoon vs Sky Lagoon — the head-to-head, from each venue’s own pages: age limits, depth, temperature, how long they suggest you stay, what each package includes, changing rooms and the drink cap.
- Reykjavík city pools — the eight pools the city runs, their rules and hours. Cheap, local, open early and late, and strict. The version of Icelandic bathing that Icelanders actually do.
Before you book
- Iceland lagoon age limits — Sky Lagoon admits no one under 12, Blue Lagoon starts at 2, Secret Lagoon publishes no minimum. If you are travelling with children this decides the trip, not the price.
- What to bring to the Blue Lagoon and Sky Lagoon — both venues supply more than the packing lists admit. What is included, the four things that are not, and the hair instruction Blue Lagoon publishes itself.
The four rules that apply almost everywhere
Each of these is quoted in full, with its source, on the page linked above it. In short:
- You shower without a swimsuit before you get in. Every venue publishes it, in near-identical wording, from the municipal pools to the lagoons. It is a hygiene rule under Iceland’s national regulation on swimming facilities, not a local custom.
- Phones are a lagoon thing, not a pool thing. Both big lagoons permit photography, with caveats. At a city pool you will be asked to put it away.
- Three drinks, and only at the lagoons. Blue Lagoon and Sky Lagoon each cap adults at three alcoholic drinks in the water. The city pools permit none at all.
- The age rules are not the same anywhere. They range from no minimum to strictly twelve and over, and two venues twenty minutes apart can sit at opposite ends of that range.
Which one fits
- Children under 12 in the party: Blue Lagoon or a city pool. Sky Lagoon is not an option.
- You want a sauna and cold-plunge circuit: Sky Lagoon — the seven-step ritual is in every ticket.
- Arriving or leaving through Keflavík: Blue Lagoon is on the way; the others are not.
- A couple of hours out of Reykjavík: Sky Lagoon, by its own recommended visit length.
- On the Golden Circle already: Secret Lagoon, which is at Flúðir rather than near the city.
- Cheap, early, and what locals do: a city pool. No bar, no timed entry, and open before most things in Reykjavík are.
Booking
All three lagoons sell timed entry and all three sell out in peak periods. The matching listings with free cancellation are Blue Lagoon admission (optional transfer), Sky Lagoon entrance including the seven-step ritual and Secret Lagoon entrance. Booking direct with the venue is equally fine. The city pools are not pre-booked; you pay at the door.
What this guide does not cover
Iceland has many more geothermal baths than these — Hvammsvík, Mývatn Nature Baths, Laugarvatn Fontana, Krauma, the Forest Lagoon and GeoSea among them. We have not read their published rules yet, so we do not write about them. When we do, they will appear here with the same treatment and the same dates.
The same method, elsewhere
This guide is built the same way as The German Sauna Guide, which applies it to nine German and Austrian venues. If sauna culture is the reason for the trip rather than something you do once you arrive, the Iceland active wellness travel guide covers the rest of the country.
Sources and verification
Every rule on the pages in this guide is quoted from a document the operator or the city publishes itself, with the date it was checked. The venue’s own current page is always the authority; rules, packages and prices change without notice. Where a venue publishes no rule on something, we say so rather than fill the gap.
Last reviewed: 27 September 2026.
Some links on this page are affiliate links to Viator. If you book through them we may earn a commission, at no extra cost to you. We chose the listings because they match the venues discussed, not because of the commission. We have not visited these venues and make no claim of personal testing.