Helios Floating Sauna
A wood-fired sauna on a pontoon in Coal Harbour at Dún Laoghaire, which the operator calls Ireland's first floating sauna, with a large window over the harbour. Between rounds you plunge straight off the pontoon into the sea, with changing rooms, showers, free lockers and dryrobes on site.
WhatBathhouse, Dún LaoghaireIreland
WhenOpen all yearSea plunge straight off the pontoon into the harbour.
Getting there Car Train
CostOn-Peak Hours, 45 min€24.95As of Oct 2026
AccessNo use under the influence of alcohol. Full refund or rescheduling 24 hours or more ahead; no refund under 24 hours. Private hire for up to 12.Timed tickets18+
Getting in
- Parking
- Parking beside the sauna
- Public transport
- A short walk from Dún Laoghaire DART station
- Address
- Coal Harbour, Dún Laoghaire, Co. Dublin
Entry, hours and rules
- Entry
- On-Peak Hours, 45 min (Mon to Fri 16:00 to 22:00, Sat and Sun 08:00 to 22:00)€24.95
- Off-Peak Hours, 45 min (Mon to Fri 08:00 to 16:00)€19.95
- Silent Session, 45 min (Tuesdays 21:00 to 22:00)€24.95
- Hours
- Mon08:00-22:00
- Tue08:00-22:00
- Wed08:00-22:00
- Thu08:00-22:00
- Fri08:00-22:00
- Sat08:00-22:00
- Sun08:00-22:00
- Swimwear and rules
- Appropriate swimwear must be worn at all times (operator).
- Children
- 18 and over. Over 18s only.
- Tickets
- Timed entry slots, book ahead
- Official site
- heliossauna.ie
- Facilities
- SaunaChanging roomsShowersLockersParking
About Helios Floating Sauna
Dún Laoghaire-Rathdown County Council, which has owned the harbour since 2018, launched the sauna on 29 May 2026. It stands on a custom-built floating platform, so during cooling breaks you hear the water lap against the hull and feel the breeze off the sea.