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Thermal baths in Newcastle (County Down)

Newcastle is a seaside town in County Down where the Mourne Mountains meet Dundrum Bay, about 45 km south of Belfast. Soak Seaweed Baths is on the South Promenade, with private rooms for baths of hot seawater and seaweed. Walkers climb Slieve Donard, whose summit is about 3 km south-west of the town.

  • Baths1
Street map of Newcastle (County Down) with every bath marked and numbered1
© OpenStreetMap contributors, © OpenMapTiles

Baths in Newcastle (County Down) compared

Entry, swimwear rules, age limits and ticket type, side by side.

BathEntrySwimwear and rulesAgeTickets
1Soak Seaweed BathsNewcastle (County Down)
  • Single Seaweed Bath, 1 hr£35about €41
  • Shared Single Seaweed Bath, 1 hr£60about €71
  • Double Deluxe Seaweed Bath, 1 hr£70about €82
  • Additional Person In Bathroom£25about €29
As of Oct 2026
Each bathing room is private and lockable, so no swimwear is needed unless you prefer it (operator). The building is unisex, with no separate female and male areas.
As of Oct 2026
none statedTimed slots, book ahead

Every bath in Newcastle (County Down)

Open all year unless the hours say otherwise.

  1. 1Soak Seaweed Baths

    Bathhouse, Newcastle (County Down) · Health conditions and operations in the last six months must be declared. Cancellation under 48 hours: 50 per cent fee; no-shows pay in full. Toiletries discouraged after the bath.

    A seaweed bathhouse on the South Promenade at Newcastle, County Down, open since 2006, which the operator calls the only seaweed bathhouse in the UK.

    £35about €41As of Oct 2026