How warm is the Blue Lagoon? The water in the Blue Lagoon is heated to around 37-40 degrees Celsius (98-104 F).
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How is the Blue Lagoon Heated? Geothermal energy. Underground lava flows and natural hot springs heat the lagoon's mix of sea and freshwater. The water is drawn up through geothermal extraction wells from 2-kilometres beneath the Earth's surface.
The Blue Lagoon's history dates back to 1976 when it formed next to a geothermal power plant, Svartsengi. Contrary to many people's belief, the lagoon is not a natural hot spring but a pool created by a human-made structure. It's wastewater from a power plant drilling for steam and hot water.
Is the Blue Lagoon always warm? As the water comes from geothermal springs, the water is scorching deep in the earth – in fact, it's 240°C or 464°F! But by the time it reaches the surface, it's 38°C or 100°F. So yes, it's warm throughout the year.
You can visit the Blue Lagoon and most of Iceland's more accessible hot springs year-round. That said, the best time to visit the Blue Lagoon is during May and September when the temperatures are still warm but it's a bit quieter.
Do you shower after the Blue Lagoon? Yes, you should shower before and after your stay at the lagoon. Guests are required to shower, without their swimsuit, prior to using the geothermal spa. Simply use the showers and soaps available in the changing rooms.
Blue Lagoon – HistoryIt is not a natural hot spring – in fact, the water within is wastewater from the power plant! While at first glance this may put you off, it should be noted that the water in the Blue Lagoon is completely safe and contains only natural minerals.
But is the lagoon's renowned geothermal seawater harmful to your hair? No, it is not harmful. Geothermal seawater contains high concentrations of minerals, such as sulfur, silica, and magnesium. While these are great for your skin, they can leave your hair feeling dry and matted.
Are swim suits required at the Blue Lagoon? Bathing suits are worn in and around all areas of the bathing lagoon, including the sauna. You can bring your own, or rent them from reception. You can also rent towels and bathrobes.
Blue Lagoon is a geothermal spaBlue Lagoon is not really a hot spring if you want to get technical. It is a man-made lagoon made with water from the nearby Svartsengi geothermal power plant. They pump up the water and use steam to generate electricity.
However, unlike some naturally occurring hot pools the Blue Lagoon is self-cleaning with nine million litres renewed by the aquifers every 40 hours. The pool is checked regularly by the spa for “foreign bacteria” and waterborne diseases, which are a risk in other geothermal pools including in New Zealand.
We recommend that you remove any jewelry (rings, necklaces, bracelets, etc.)before entering the lagoon. This will ensure that you don't lose your items and that they don't get damaged by geothermal seawater which has high levels of silica, algae, and minerals.
The Blue Lagoon was named because the water of the lagoon looks blue when reflected from the sun but in actuality, the water is a milky white color. And don't worry about the smell, the sulfur has been removed so there is no funky smell at all anymore.
If you book the Premium or Luxury packages, then your entrance also includes a bathrobe. If you have your own towel (or bathrobe), you are welcome to bring it to the Blue Lagoon to use. However, we recommend just using the free towel provided as otherwise you will have wet towels to take home with you.
Many guests prefer to use flip-flops while walking in and around the water. If you would like to wear flip-flops, you may bring them with you or purchase them at the Blue Lagoon reception desk. Water shoes are allowed, but we don't offer them for sale.
To enjoy a more peaceful and serene experience, it's best to visit the Blue Lagoon during off-peak hours. Visiting early in the morning between 8:00 AM and 9:00 AM or in the evening between 6:00 PM and 7:00 PM when it's quieter is a great way to avoid crowds and fully appreciate the natural beauty of the lagoon.