Sky Lagoon
By far the best man made lagoon that I’ve been to in Iceland, and that’s saying much. 10 min drive from the city center. There are three options: Pure Pass Lite, Pure Pass and Sky pass. I recommend the Pure Pass, the others passes are not worth what they offer. They offer a shuttle service from pick up points in the city center. These are the transfer times:
From Reykjavík: 13:00 - 15:00 - 17:00 & 19:00
From Sky Lagoon: 15:30 - 17:30 - 19:30 & 21:30
Vesturbæjarlaug
Cosy public pool in the western part of the city…about 30 min walk from the city center. Pool, hot tubs and sauna/steam bath. 1100 ISK admission. No need to book in advance, you just show up.
Laugardalslaug
Largest public pool in Iceland. Numerous hot tubs, pool and sauna/steam bath. 1100 ISK admission. No need to book in advance, you just show up.
Sundhöll Reykjavíkur
Public pool right in the city center. Nice atmosphere with hot tubs, pool and sauna/steam bath. 1100 ISK admission. No need to book in advance, you just show up.