Outdoor Spa UK: 11 Rooftop, Clifftop and Lakeside Pools

An outdoor spa in the UK sounds like a summer idea, and the brochures sell it that way, with loungers and sunshine. The better time is usually the opposite. Sitting in water at body temperature while cold air moves over your face is the whole point, steam rises off the surface, and the pools are quieter once the summer crowds have gone. What you want is a view worth sitting in the rain for, water that is properly warm, and an honest sense of what is outside and what is not.

This list covers eleven UK spas where the outdoor facilities are the reason to go, not an extra hot tub by the car park. We checked each against the venue’s own pages and current listings. Facilities, prices and age rules change, so confirm with the spa before you book.

At a glance

England

Thermae Bath Spa, Bath

The only place in Britain where you can bathe in naturally warm spring water, and the rooftop pool is the reason people queue. You look out over the city’s roofs to Bath Abbey and the hills, and it is at its best on a dark winter evening with the steam lifting off the water. Thermae Bath Spa sets a minimum age of 16 with proof of age, and 18 for treatments. It is a city-centre day spa rather than a hotel, so expect it to be busy at weekends. Nearby alternatives are in our spa days in Somerset and Bath page.

Best for: a short, spectacular session without an overnight stay.

Rudding Park, Harrogate

Rudding Park’s Roof Top Spa opened in 2017 and is built across three levels, with the hydrotherapy infinity-edge pool running from inside to out and looking over the gardens. There is a south-facing sun deck, a panoramic sauna, and ice baths for the contrast. It suits people who want the view and the hydrotherapy jets more than a swim. More options across the county are in spa days in Yorkshire.

Best for: a polished spa hotel with an outdoor pool that works year round.

Low Wood Bay, Windermere

The most dramatic outdoor spa setting in England. Low Wood Bay on the shore of Windermere has two heated outdoor infinity pools facing across the lake to the Langdale Pikes, elevated hot tubs, and a fellside sauna with a log burner. Its own guidance says the outdoor infinity pools and hot tubs are for guests aged 16 and over. The outdoor areas sit within the paid thermal journey, so check what your package includes. For wider options see spa hotels in the North West.

Best for: mountain views from the water, especially in cloud and low winter light.

The Spa at Carden, Cheshire

Carden Park calls its Spa Garden one of the UK’s largest, and the numbers back it up: a heated outdoor 11-metre vitality pool with bubbles, massage jets and swan neck showers, three hot tubs that each seat eight to ten, heated pods, an outdoor sauna, a firepit and a Bollinger bar. It is over-18s only. This is the most sociable outdoor spa on the list; on a sunny weekend it feels closer to a pool party than a quiet retreat.

Best for: groups and birthdays that want atmosphere.

Seaham Hall, County Durham

The newest outdoor space here. Seaham Hall’s Serenity Spa now has a brand-new garden with two heated infinity-edge pools, a cold plunge pool, fire pits, an outdoor deck and a roof terrace, and the spa lists access to it as included for hotel guests and spa visitors. Indoors there is a 20-metre pool with massage stations. If you have been before and remember the old garden, it is worth a second visit. More in spa days in the North East.

Best for: hot and cold contrast bathing close to the Durham coast.

South Lodge, West Sussex

The Spa at South Lodge, opened in 2019, has two very different outdoor pools. The heated outdoor hydrotherapy pool has jet beds and a water blade for your shoulders. Beside it is an 18-metre natural swimming pond, filtered by reeds rather than chemicals, and kept cool; reviewers put it at around 14 degrees. Swim a length in the pond, then get straight into the hydro pool. See spa days in Sussex for more.

Best for: wild swimming without a lake, an hour from London.

Scarlet, Cornwall

An adults-only hotel on the cliffs above Mawgan Porth. Scarlet has wood-fired clifftop hot tubs looking straight out over the Atlantic, a cedar sauna on the clifftop, and a natural outdoor pool cleaned by reeds and algae instead of chemicals. The beach is below if you want a sea swim first. This is a stay, not a quick spa day, and the hot tubs book up. Other Cornish options are in spa days in Cornwall.

Best for: a couple’s break built around the sea.

Wales

St Brides Spa Hotel, Saundersfoot

St Brides sits on the cliff above Saundersfoot harbour, and its Marine Spa has what it describes as Wales’s only true infinity-edged hydrotherapy pool, looking out over the harbour and Carmarthen Bay. The pool is heated to about 35 degrees, with jet air beds and swan neck showers, and indoors there is a thermal suite with a salt infusion room, rock sauna and ice fountain. See spa days in Wales for more.

Best for: a sea view from warm water without driving to Cornwall.

Northern Ireland

Galgorm, County Antrim

Galgorm’s Thermal Spa Village near Ballymena, about 20 minutes from Belfast, is the largest outdoor spa complex on this list, spread along the banks of the River Maine. It has log-fired riverside hot tubs, indoor and outdoor heated pools, a Celtic sauna with Aufguss-style rituals, and a snow cabin for the cold part of the circuit. Day visitors can book as well as resort guests. More in spa days in Northern Ireland.

Best for: a full thermal circuit with the most outdoor variety in the UK.

Scotland

The Carrick, Cameron House, Loch Lomond

The Spa at the Carrick, about three miles from Cameron House itself, has a rooftop infinity pool looking across Loch Lomond. Hydro experiences and treatments are for over-18s only. The pool is the attraction; book a session near sunset if you can, when the light over the loch is at its best.

Best for: a rooftop view in Scotland that rivals Bath’s.

Loch Fyne Hotel & Spa, Inveraray

A smaller, simpler option. The hotel has indoor and outdoor hot tubs, some with views across Loch Fyne, plus a steam room, aqua jets and a salt room. Thermal time is sold by the hour for two people, and guests in suites get it included, which makes it a good add-on to a West Highland trip rather than the reason for it. More ideas in spa days in Scotland.

Best for: a relaxed soak on a touring holiday.

How to get the most from an outdoor spa

Go when it is cold. Warm water feels best against cold air. November to March is the season for outdoor pools; summer is better for sunbathing than for the water.

Check what “outdoor” includes. Several spas split facilities between a basic leisure area and a paid thermal journey, and the outdoor pools sit in the paid part. Ask whether your package or room rate includes them.

Time your visit. Weekends, afternoons and school holidays are busiest. A weekday morning or an evening slot can mean having a hot tub to yourself.

Pack for the walk between pools. A robe and sliders are usually provided, but a swimming cap or hair tie, a spare dry swimsuit and a woolly hat for the hot tub make winter visits far more comfortable. Our what to wear to a spa day page has the full list.

Use the cold, carefully. Plunge pools and swim ponds are part of the fun at Seaham Hall, South Lodge and Galgorm. Keep cold dips short and skip them if you have a heart condition or blood pressure concern without medical advice. Our sauna and cold plunge planner helps you set sensible timings.

Want it to yourself? Some hotels let you hire a private hot tub or spa suite. See our guide to private spas in the UK.

Frequently asked questions

What is an outdoor spa? At a UK spa hotel or day spa, an outdoor spa is a set of heated facilities in the open air: hydrotherapy pools, infinity pools, hot tubs and sometimes saunas, used alongside the indoor thermal suite. The name is also used for garden hot tubs, but this page covers spas you can visit.

Are outdoor spa pools warm enough in winter? Yes. Outdoor hydro pools and hot tubs are heated year round, typically well above swimming pool temperature; St Brides heats its infinity hydro pool to about 35 degrees. Only natural swim ponds and plunge pools are deliberately cold.

Which UK spa has the best outdoor pool with a view? For natural thermal water and a city skyline, Thermae Bath Spa’s rooftop pool. For mountain scenery, Low Wood Bay’s infinity pools over Windermere. For the sea, St Brides in Pembrokeshire or Scarlet in Cornwall.

Can children use outdoor spas? Rarely. Thermae Bath Spa and Low Wood Bay set a minimum age of 16, while the Spa at Carden and the Carrick at Cameron House are 18 and over, and Scarlet is an adults-only hotel. Check each spa’s policy before booking a family visit.

Do you need to book outdoor spa facilities in advance? Almost always. Spa days and thermal sessions are sold in timed slots, and the popular outdoor spas sell out at weekends. Hotel guests sometimes have included access but may still need to reserve a time.

What should I wear to an outdoor spa in the UK? A swimsuit, the robe and slippers the spa provides, and something to keep your head warm in winter. Bring a second swimsuit if you are moving between pools for several hours, because a wet one gets cold fast in the open air.