The UK is in the middle of another heatwave and, with it, the familiar ritual of sleepless nights, whirring fans and dreams of plunging into cool water. If soaring temperatures have you longing for a holiday, you don’t necessarily need to board a plane.From rooftop retreats in the heart of London to clifftop pools with Mediterranean-style views and countryside spas surrounded by rolling hills, there are plenty of places to escape the heat a little closer to home.Whether you’re planning a romantic overnight stay, a family break or simply craving a day on a sun lounger, these are nine of the UK’s most beautiful outdoor hotel pools to dive into this summer.1. art’otel London Battersea Power StationLocation: London art’otel London Battersea Power Station, LondonPerched above Battersea Power Station, this stylish rooftop pool feels a world away from the bustle below. Spend the afternoon taking in sweeping skyline views before unwinding in the steam room, hot tub or spa, or simply settle into a lounger with a cocktail in hand.The hotel’s Italian restaurant serves everything from leisurely brunches to afternoon tea and evening drinks, making it an ideal city escape for couples or anyone looking to recharge.Rooms start from around £308 per night.2. Carbis Bay EstateLocation: St Ives, Cornwall Carbis Bay Estate, CornwallWith its turquoise sea, white-sand beach and subtropical gardens, Carbis Bay is one of the few places in Britain that genuinely feels like you’ve landed somewhere in the Mediterranean.Overlooking the bay, the outdoor pool is the perfect place to while away a sunny afternoon before strolling down to the beach or settling in for freshly caught Cornish seafood at the hotel’s award-winning restaurant. During the summer months, live entertainment adds to the relaxed holiday atmosphere.Rooms start from around £200 per night.3. The NICILocation: Bournemouth The NICI, BournemouthJust moments from Westcliff Beach, The NICI has become one of the South Coast’s most stylish staycation addresses.Its standout feature is the 30-metre heated outdoor pool, framed by cabanas, loungers and fire pits that make it just as inviting beyond the summer months. After a walk along the Jurassic Coast, there’s nowhere better to soothe tired legs before heading to the South Beach Bar for cocktails in the sunshine.Families are well catered for with a children’s club during the school holidays, while guests looking for a day of indulgence can book a Daycation, which includes access to the outdoor pool and spa.Rooms start from around £140 per night.4. Low Wood Bay Resort & SpaLocation: Windermere, Lake DistrictLow Wood Bay Resort & Spa, Lake DistrictFew pools come with a backdrop quite as spectacular as this infinity pool overlooking Lake Windermere, England’s longest lake.Whether you spend the day paddleboarding across the water, sailing or simply soaking up the scenery from the outdoor thermal spa, it’s a destination made for slowing down. Afterwards, tuck into lunch or dinner from the hotel’s impressive wood-fired grill before returning for another dip.Rooms start from around £158 per night.5. Hope Street HotelLocation: Liverpool Hope Street Hotel, LiverpoolIn the heart of Liverpool, Hope Street Hotel proves you don’t have to leave the city to enjoy a spa escape.Its contemporary, Scandi-inspired spa combines a heated outdoor vitality pool with saunas, steam rooms and a relaxing thermal journey for adults. Afterwards, unwind over pizza or pasta at the hotel’s 1981 restaurant, or catch a film at Liverpool’s first hotel cinema before retreating to bed.Rooms start from around £179 per night.6. Manor House Hotel & SpaLocation: Alsager, Cheshire Manor House Hotel, CheshireSet around a beautifully restored 17th-century farmhouse, Manor House Hotel blends countryside charm with modern spa luxury.The heated outdoor pool is the star attraction, complete with a swim-up bar serving cocktails, soft drinks and light bites throughout the day. Guests can also enjoy the indoor pool, garden spa, sauna and steam room before dining beneath original oak beams in the historic Stables restaurant.Rooms start from around £165 per night.7. Buxton Crescent Hotel & SpaLocation: Buxton, Peak District Buxton Crescent Champneys, Peak DistrictSteeped in history yet thoroughly modern inside, Buxton Crescent offers one of the country’s most distinctive spa experiences.Alongside a heated rooftop pool and two indoor pools, guests can unwind in three different saunas or soak in the beautifully restored Victorian thermal pool, filled with naturally warm Buxton mineral water. The elegant Georgian surroundings only add to the sense of occasion.Rooms start from around £155 per night. 8. Marine North BerwickLocation: North Berwick, Scotland Marine North Berwick, ScotlandWith sweeping coastal views and an indoor-outdoor hydrotherapy pool overlooking the gardens, Marine North Berwick is tailor-made for a restorative seaside escape.Beyond the spa, the charming East Lothian town offers championship golf courses, the award-winning NB Distillery and the dramatic ruins of Tantallon Castle. Back at the hotel, guests can unwind in the aroma steam room, bio sauna, ice room or sensation showers after a day exploring the coast.Rooms start from around £345 per night.9. Calcot Manor & SpaLocation: Cotswolds Calcot Manor & Spa, CotswoldsSet within a beautifully restored 14th-century estate, Calcot Manor offers the kind of countryside retreat that invites you to switch off completely.Surrounded by 220 acres of rewilded Cotswold countryside, the outdoor pool sits among wildflower meadows and peaceful gardens, while nature trails weave through the estate. Accommodation ranges from elegant family rooms and cottages to luxurious woodland treehouses, making it just as suited to family holidays as romantic escapes.Rooms start from around £299 per night.