Lonna is one of those little Helsinki islands that locals quietly love. It’s super close to the city, but once you step off the ferry, it feels like you’re on a tiny escape – with sea views, old brick buildings, a chill outdoor bar, and one of the coolest public saunas in town.

The Lonna sauna is a modern, stylish wooden sauna right on the water’s edge. It’s a mixed-gender sauna (swimsuits on), with huge windows looking out to the sea, and an outdoor deck where you can cool off between steam sessions. The atmosphere is relaxed and social, but never too crowded – it’s more about quiet enjoyment than party vibes.

How to get there:

• Catch the JT-Line water bus from Market Square. It takes less than 10 minutes.

• The ferry runs from May to September, with more frequent departures in summer.

Good to know & tips:

• Book the sauna early: Lonna sauna is super popular, especially on sunny evenings, so definitely book your slot in advance on their website.

• Swimsuits & towels: It’s a mixed sauna, so swimsuits are mandatory. You can rent a towel or bring your own.

• Stay for dinner or drinks: After your sauna, grab a drink at the island’s terrace bar or have dinner at the lovely restaurant – it’s all about local, seasonal food.

• Quiet escape: Lonna is a great choice if you want that island feeling without committing to a full day trip. Even just going for a sauna and a drink feels like a mini holiday.