Allas Pool

Allas Pool sits right at Katajanokanlaituri, next to the Market Square, where the harbor meets the city center. The setup is simple: a heated pool kept around 27°C, a cold sea-water pool at roughly 12°C, and a separate children's pool for families. Saunas and a cold plunge round out the bathing side, and there's a restaurant and café on site for lunch or a drink afterward.

It's a day-pass operation with no membership or hotel-guest requirement, so walk-ins are welcome during opening hours. The complex is not adults-only and not clothing-optional, making it a straightforward option for couples, solo visitors, and families alike. Staff and signage work in both Finnish and English.

Beyond the pools, Allas Pool runs a regular schedule of extras — yoga and movement classes, themed evening swims, and seasonal events tied to the restaurant. None of this requires special access; it's layered onto the same day-pass structure.

Opening hours run 6:30 to 21:00 on weekdays and 8:00 to 21:00 on weekends, which gives room for an early swim before work or a late sauna session after dinner. The location in Katajanokka puts it within easy walking distance of central Helsinki, so it works as a short stop as easily as a longer visit built around lunch at the on-site restaurant.