Allas Sea Pool is the sauna experience that sits in the middle of the city. It floats in the harbour beside the Market Square, in the Katajanokka waterfront area next to the SkyWheel, so you can step from the ferry quay or Senate Square into a wooden spa with views of the cathedral skyline. The complex combines saunas with pools and a terrace, and the idea is the classic Finnish loop: heat, cool water, rest and repeat, but at a central, easy-to-reach address. The pools use seawater, with warm pools for lingering and a cooler option for those who like the shock. This guided sauna-and-pool ticket suits visitors who want help with the etiquette and a hosted introduction rather than turning up cold. Compared with Löyly, Allas is more central and more public in feel, while Löyly is more architectural and more atmospheric at the edge of town.
Planning your visit
Sessions are timed and prices vary, so check current availability and what your ticket includes, such as towel hire or a guide. Swimsuits are the norm in the mixed areas, and shower rules and sauna etiquette are explained by staff. The facility operates through the seasons, but opening hours and temperature options vary, so confirm before you travel, especially in winter.
What to expect
Allow two to three hours. Begin with a shower, then settle into a sauna until you are comfortably hot. Move to a pool or the sea-facing terrace to cool, and rest before repeating. Drink water between rounds and do not feel pressured to plunge into cold water; the warm pools and terrace are part of the pleasure. In winter, the contrast of steaming water and freezing air and the view across a dark harbour is memorable. Bring a swimsuit, flip-flops if you like, and a sense of humour.
Making the most of it
Allas sits beside the SkyWheel, the Flying Cinema, Uspenski Cathedral and the Suomenlinna ferry, so it slots easily into a day of central sightseeing. Go in the late afternoon after a museum or the market, and finish with dinner in the old town. If you can do only one sauna in Helsinki, choose Löyly for atmosphere and Allas for convenience. Book ahead on weekends and evenings, and check whether any of your party prefers a quieter off-peak slot.
What to expect
The experience
A floating waterfront spa with saunas, seawater pools and a sea-view terrace.
Best time
Late afternoon or evening, especially in winter for the contrast.
How long
Two to three hours.
Tips
Bring a swimsuit, drink water between rounds and book ahead for weekends.
Quick picks
- Best for
- A central, easy first sauna.
- Families
- Check age policies with the operator before bringing children.
- Couples
- Warm pools and harbour views at dusk.
- Pair with
- The SkyWheel, Uspenski Cathedral and the Market Square.
- Time needed
- Two to three hours.
Good questions
Where is Allas Sea Pool?+
On the harbour by the Market Square, next to the SkyWheel in the Katajanokka waterfront area.
Do I need a swimsuit?+
Yes, swimwear is the norm in the shared areas.
How does it compare with Löyly?+
Allas is more central and public; Löyly is more architectural and sits at the city’s edge.
Is it open in winter?+
It operates through the year, but check hours and conditions before you go.
How long should I allow?+
Two to three hours for a relaxed loop of sauna, pool and terrace.
