Iceland guides · Hot pools

What should you wear to the Blue Lagoon?

A swimsuit — the water stays around 37–39 °C (98–102 °F) all year — plus warm clothes for the walk in and out. Shower without your swimsuit before you get in, as at every Icelandic pool, condition your hair against the silica, and leave silver jewellery in your locker. In January the air nearby averages -1 to 3 °C (29 to 38 °F).

From Icelandic Met Office measurements, 1991–2020Reviewed 19 October 2026

What to bring

A swimsuit, and flip-flops if you like. Check what your ticket includes: towels and robes come with some and can be rented otherwise. In winter bring a hat and gloves for the walk between the car park or bus and the changing rooms.

The shower rule

Every pool and lagoon in Iceland asks you to shower without your swimsuit, with soap, before you get in. It's how the pools stay clean with little chlorine, and staff will remind you.

Your hair and the silica

The lagoon's silica and minerals leave hair stiff and dry for a day or two. Rub in plenty of the conditioner from the showers before you go in, keep your hair out of the water if you can, and condition again afterwards. Take off silver jewellery, which the minerals can tarnish.

Before you go

The Blue Lagoon sits beside the Reykjanes volcanic fissures and has closed for a time during recent eruptions nearby. Check bluelagoon.com on the day. Sky Lagoon near Reykjavík and the Forest Lagoon near Akureyri follow the same rules.

The air above the water: Keflavík, the nearest Met Office station

Icelandic Met Office, 1991–2020, Keflavík Airport, about 20 km from the lagoon.

	Low – high	Feels like	Average wind	Wet days
January	-1° – 3°	-5°	8 m/s	17
February	-2° – 3°	-5°	8 m/s	16
March	-1° – 4°	-5°	8 m/s	16
April	1° – 7°	-1°	7 m/s	12
May	4° – 10°	3°	7 m/s	12
June	7° – 13°	7°	6 m/s	10
July	9° – 14°	11°	6 m/s	11
August	9° – 14°	11°	6 m/s	13
September	7° – 11°	5°	7 m/s	16
October	3° – 8°	1°	7 m/s	15
November	0° – 5°	-3°	8 m/s	15
December	-1° – 4°	-5°	8 m/s	17

Questions visitors ask

How warm is the Blue Lagoon?

The water stays around 37–39 °C (98–102 °F) all year, warmer in some corners. In winter the air above it can be below freezing, so your head and shoulders feel the cold.

Will the Blue Lagoon ruin my hair?

Not permanently, but the silica leaves it stiff and dry for a day or two. Use the conditioner in the showers before and after, and keep your hair out of the water if you can.

What should I wear to the Blue Lagoon in winter?

Your swimsuit in the water, and warm layers for getting there: in December the air nearby averages -1 to 4 °C (30 to 39 °F) with 7.8 m/s (17 mph) of wind. A hat and waterproof shoes help on the walk.

These are the usual conditions, not a forecast. Before you set off, check the latest forecast and warnings on Iceland Weather or vedur.is, the roads on umferdin.is and travel alerts on safetravel.is. In an emergency, call 112.