Two very different geothermal experiences separated by about 90km and a significant price gap. The Blue Lagoon is Iceland’s flagship commercial spa. The Secret Lagoon (Gamla Laugin) in Flúðir is Iceland’s oldest operating geothermal pool — established in 1891, informal, and inexpensive. Here is a direct comparison.
At a Glance
| Blue Lagoon | Secret Lagoon | |
|---|---|---|
| Location | Grindavík, Reykjanes Peninsula | Flúðir, South Iceland |
| Distance from Reykjavík | 48 km (45 min by car) | 90 km (90 min via Route 35) |
| Entry price (2026) | ~ISK 9,990 (Comfort) | ~ISK 3,000 adult |
| Minimum age | 2+ | None listed |
| Facilities | Full spa, restaurant, shop | Basic changing hut, hot pots |
| Must book in advance? | Yes — weeks/months ahead | Recommended in summer |
| Capacity | Large — up to thousands daily | Small — ~30–50 bathers at once |
Location
Blue Lagoon: 48 km southwest of Reykjavík on the Reykjanes Peninsula, 23 km from Keflavík Airport. The drive from Reykjavík takes around 45 minutes. It sits in the middle of a black lava field, which is half the visual appeal. The Reykjanes location makes it a logical arrival-day or departure-day stop for anyone flying through Keflavík.
Secret Lagoon: In Flúðir, a small farming village in the Hvítá river valley, approximately 90 km from Reykjavík — roughly 90 minutes by car via Route 35 (Þjóðvegur). It sits just off the Golden Circle route, making it a natural addition if you’re already doing the Golden Circle loop through Þingvellir, the Geysir geothermal area, and Gullfoss. There is no practical public transport link.
Verdict: Blue Lagoon is easier to reach from Reykjavík (especially without a car) and combines naturally with the airport. Secret Lagoon requires a car but fits well with a Golden Circle day trip.
Price Comparison (as of 2026)
| Package | Blue Lagoon | Secret Lagoon |
|---|---|---|
| Standard adult entry | ~ISK 9,990 | ~ISK 3,000 |
| What’s included | Lagoon, towel, robe, silica mud mask, 1 drink | Lagoon access only; towel rental separate |
The Secret Lagoon is approximately one-third the price of the Blue Lagoon’s base package. The Blue Lagoon’s price includes substantially more amenities — at the Secret Lagoon you are paying for access to the pool, not an all-in spa experience.
Budget in an additional ISK 1,500–2,000 for towel rental at the Secret Lagoon if you don’t bring your own.
The Experience
Blue Lagoon: A purpose-built luxury spa. The milky-blue silica water (a byproduct of the nearby Svartsengi geothermal plant) reaches 37–39°C year-round. The 5,000 sq metre main lagoon has a sauna built into the lava wall, waterfall jets, and an in-water bar. Silica mud masks are dispensed directly from troughs in the water. The Retreat Lagoon (adults-only, private, ~ISK 44,990) is separate. It is busy, well-maintained, and operationally polished.
Secret Lagoon: A geothermal pool that has operated in essentially the same form for over 130 years. The pool is approximately 38°C and sits next to a small geothermal area — a natural geyser (Litli Geysir) erupts nearby every few minutes. The setting is unpretentious: a wooden changing hut, a grassy bank, some benches. There is a smaller hot pot beside the main pool. No spa treatments, no in-water bar, no robes. What you get is a genuine old Icelandic swimming pool in a natural geothermal landscape.
Atmosphere and Crowds
Blue Lagoon: High season (July–August) and midday slots (10am–3pm) are busy by any measure, though capacity is managed with timed entry. Expect other visitors. The steam, the otherworldly water colour, and the lava backdrop compensate — it remains genuinely striking even when busy.
Secret Lagoon: Much quieter. A small pool with limited capacity means you’re rarely sharing the water with more than 20–30 people. The atmosphere is relaxed and unpretentious. Weekday visits in May, September, or October can feel almost private. Even in peak summer it doesn’t reach Blue Lagoon crowd levels.
Facilities
Blue Lagoon: Changing rooms with lockers, hair dryers, complimentary conditioner stations (essential — the silica dries hair significantly), a spa shop, LAVA Restaurant, café, and luggage storage. The amenities are extensive and well-run.
Secret Lagoon: A basic wooden changing hut. Lockers are available. There is no restaurant — a small café near the car park sells drinks and snacks. Pack in and pack out; this is not a full spa day.
Children
Blue Lagoon: Children aged 2 and over are permitted with Comfort and Premium packages. Under-2s are not allowed.
Secret Lagoon: No minimum age is advertised. Children are permitted. The natural, open setting may suit families better than the Blue Lagoon’s more structured environment — though there are no dedicated children’s facilities.
Who Each is Best For
| Visitor type | Recommendation |
|---|---|
| First-time Iceland visitor | Blue Lagoon (iconic setting, bucket-list experience) |
| Budget traveller | Secret Lagoon (ISK 3,000 vs ISK 9,990) |
| Golden Circle day-tripper | Secret Lagoon (it’s on the route) |
| Arriving/departing via Keflavík | Blue Lagoon (23 km from airport) |
| Families with young children | Either — but Secret Lagoon is lower stakes |
| Looking for an authentic, local feel | Secret Lagoon |
| Wanting a full spa day | Blue Lagoon |
| History/authenticity | Secret Lagoon (operational since 1891) |
Recommendation
Choose Blue Lagoon if: This is your first visit to Iceland and you want the iconic experience, you’re stopping near Keflavík Airport, or you want a proper spa day with food, treatments, and amenities.
Choose Secret Lagoon if: You’re driving the Golden Circle and want to add a geothermal dip without a detour, you’re on a tight budget, you prefer an uncrowded and unpretentious experience, or you want something that feels genuinely Icelandic rather than tourist-designed.
There is no wrong answer — they are fundamentally different products at different price points with different purposes.
Booking and Practical Details
Blue Lagoon: Book weeks ahead in summer at bluelagoon.com. Walk-in entry is not available. Arrive in the first slot (typically 8am) or after 4pm for quieter conditions.
Secret Lagoon: Book at gamlaaugin.com. Advance booking is recommended in July and August but the pool is far less likely to sell out. Shoulder season visits (May, September) often need no advance booking.
Getting there: The Blue Lagoon is accessible by bus from Reykjavík (Reykjavík Excursions, ~ISK 3,500 return). The Secret Lagoon is not practically accessible without a car.
Book Blue Lagoon tours and transfers — combined transport and entry packages from Reykjavík.
Book Golden Circle tours — many include the Secret Lagoon as a stop, saving the need to drive independently.
🏨 Search hotels near the Blue Lagoon — Search hotels in Selfoss (nearest base for the Golden Circle / Flúðir area)
Related Guides
- Blue Lagoon vs Sky Lagoon — The two main commercial geothermal spas compared on price, location, and atmosphere
- Blue Lagoon vs Mývatn Nature Baths — Iceland’s most famous spa versus the volcanic north alternative
- Blue Lagoon Iceland — Complete visitor guide: packages, prices, and what to expect
- Geothermal pools in Iceland — Full overview of commercial spas, municipal pools, and free natural options
- Natural hot springs in Iceland — Free and wild geothermal bathing across Iceland
- Golden Circle tours Iceland — Þingvellir, Geysir, and Gullfoss — the Secret Lagoon is a natural add-on stop