Löyly is a public sauna, restaurant and bar in Hernesaari, Helsinki, Finland.

Löyly’s owner is actor Jasper Pääkkönen. The building is designed by Avanto Architects Ltd. Hernesaari is a former industrial area on the Helsinki sea shore that will be built into a residential area. New use is developed for the area already now while waiting for the future change. As the site is part of Helsinki Park following the capital’s coastline, the sauna was developed into an easy-going undulating artificial topography that is more a part of the landscape than a conventional box like building. The structure is like a big stone on the sea shore, Interesting views open up to city centre and even to open sea between wooden lamellas that cover the warm building mass. The whole building forms also a huge outdoor auditorium and you can climb on the roof terrace and even on the lookout terrace to enjoy the views. Löyly offers foreign visitors a public all year round sauna experience – a must when visiting Finland.

The building has become one of Helsinki main tourist attractions. Löyly is published in many leading magazines and newspapers.