Löyly is a waterfront sauna and restaurant on the Hernesaari shore, in a timber building by the Baltic Sea. Its two public saunas, a traditional smoke sauna and a wood-burning sauna, each hold around 20 bathers and open straight onto a terrace and the sea for a swim. The saunas are mixed, so swimwear is worn throughout. A two-hour visit costs EUR 29 including a towel, and a smaller private sauna for up to 10 can be booked. The saunas close for maintenance from 4 to 7 October 2026.