Blue Lagoon, Sky Lagoon or Secret Lagoon — pick by what your day looks like
Three hot lagoons near Reykjavík, three very different days. We say which one fits an airport day, a city evening and a Golden Circle loop.
Everyone asks which lagoon to book. Wrong question. The lagoons are not competing for the same slot in your trip. One sits next to the airport, one sits on the edge of the city, one sits an hour and a half inland on the Golden Circle route. Pick the one that fits the day you already have.
Blue Lagoon — the airport lagoon
The Blue Lagoon is on the Reykjanes peninsula, about 20 minutes from Keflavík Airport and 45 to 50 minutes from downtown Reykjavík. That geography is the whole argument for it. Go on the way in from the airport or on the way out. Going from Reykjavík and back on a normal day costs you most of an afternoon in a bus for a two-hour soak.
What you get: milky blue water in a black lava field, silica mud, a swim-up bar, a slick changing-room operation. What you pay for: it’s the most expensive of the three by a wide margin, and you must pre-book a time slot. It also sits inside the active Reykjanes volcanic zone and has closed at short notice during eruptions. If your flight schedule can’t absorb a cancelled slot, don’t build the day around it.
The simplest way to do it is the Blue Lagoon admission with transfer from Iceland Direct Tours (from €140, four hours). If you want it folded into a sightseeing day, BusTravel Iceland runs a Golden Circle and Blue Lagoon small-group tour with admission (from €227, 11 hours). Eleven hours is a long day. We’d only take that one if you have two full days in the country and no more.
Sky Lagoon — the city lagoon
Sky Lagoon is in Kópavogur, on the shore, about 15 minutes by car from downtown Reykjavík. No transfer day needed; a taxi or the city bus gets you there. The pool has an infinity edge facing the sea, a sauna with a full glass wall, and a fixed sequence of cold plunge, sauna, mist and scrub that takes about half an hour. It is aimed squarely at adults. It is calm, dim and quiet in a way the Blue Lagoon is not.
We don’t sell a Sky Lagoon tour. You don’t need one. Book direct, pick a late-afternoon slot in winter and you may see the sun set over Faxaflói from the water. The downside is the price, which is close to Blue Lagoon territory, and the fact that it’s a lagoon in a suburb. Nothing wild about the setting.
Secret Lagoon — the honest one
The Secret Lagoon is in Flúðir, a farming village on the Golden Circle loop, roughly 90 minutes from Reykjavík. It is Iceland’s oldest swimming pool, built in 1891, and it looks it: a simple stone-edged pool fed by hot springs, steam vents bubbling next to the path, a basic changing room, a small café. No ritual. No swim-up bar. Cheapest of the three, and the only one that feels like a village pool rather than a spa.
It works as the last stop of a Golden Circle day, when your legs are tired and you’ve seen Gullfoss. Two operators do exactly that: BusTravel Iceland’s Golden Circle and Secret Lagoon tour (from €114, ten hours) and Arctic Adventures’ Golden Circle and Secret Lagoon (from €135, nine hours, smaller bus). Both include admission. The tradeoff is that you arrive with a busload of other people at the same time, and the pool is small.
Blue Lagoon or Secret Lagoon, head to head
This is the two-way question people actually type, so here it is without the third option in the way.
Price. The Secret Lagoon is roughly a third of the Blue Lagoon’s admission. Bought inside a tour it is cheaper still, because the operator is really selling you the Golden Circle: BusTravel Iceland’s Golden Circle and Secret Lagoon tour is €114 for ten hours with admission included, against €227 for the eleven-hour Golden Circle and Blue Lagoon.
Geography. Blue Lagoon is 20 minutes from Keflavík Airport and 50 from Reykjavík. Secret Lagoon is 90 minutes inland from Reykjavík, on the Golden Circle loop. Neither is near the other. You will not do both in a day without wasting the day.
What it feels like. The Blue Lagoon is a designed experience: opaque blue water in black lava, a mask bar, a swim-up bar, lockers that read your wristband, and several hundred other people moving through timed slots. The Secret Lagoon is a stone-edged pool behind a farm village, built in 1891, with a hot spring bubbling beside the path and a changing room that is exactly as basic as that sounds. Clear water, so you can see your feet.
Booking and risk. The Blue Lagoon sells out weeks ahead in summer and around New Year, and it sits beside Grindavík in an active volcanic zone — it has closed at short notice during eruptions since 2023. The Secret Lagoon is small, so it fills up when three coaches arrive together, but it is not going to be shut by a fissure.
So which. Arriving or leaving via Keflavík with a spare half-day: Blue Lagoon, because the geography does work for you and nothing else on Reykjanes is as good a use of that gap. Already booked on a Golden Circle day and unwilling to spend three figures on hot water: Secret Lagoon, no hesitation. Staying in Reykjavík with no airport gap and no Golden Circle plan: neither — go to a neighbourhood swimming pool for about €8 and spend the difference on a tour.
Our honest take
If you have one soak in you: arrival or departure day, Blue Lagoon, and accept the price. It’s the only one that saves you time instead of costing it. If you’re staying three nights in Reykjavík and want a quiet evening, Sky Lagoon on your own, no tour. If you’re doing the Golden Circle anyway and want the least fuss for the least money, add the Secret Lagoon to that day and skip the other two.
Doing all three is not a plan. It’s a lot of wet hair and about a third of your budget on hot water.
