Seaside saunas use the sea as the cold plunge. Most of the venues on this cut are wood-fired barrels or small cabins within a few metres of the tideline, and most of their regulars are year-round cold-water swimmers. January sea is a different animal from August sea — check the season, not just the forecast, before committing.
In Finland, 4 of the curated saunas fit this cut. See the full Finland country guide for every venue, or keep scrolling for just the seaside saunas.
