Heatwave alert: this weekend, as temperatures are set to soar above 30C, Brits will be on the lookout for ways to cool down amid the glorious sunshine.Naturally, a day spent by the pool will be on the cards for many – little is better than a day spent lounging with a cocktail in one hand, a fan in the other, knowing you have somewhere close by to cool off.Whether you’re on the hunt for a quiet retreat, a bustling pool full of activities or something in between, we’ve got you covered.The Daily Mail travel desk has picked out some of the best across the country, from popular pools to serene swimming havens…Fowey Hall, Cornwall First up on the list is Fowey Hall, a swimming pool that’s reminiscent of an Italian villaPerched on a hillside overlooking its namesake coastal town, Fowey Hall is a historic Victorian mansion with views to covet.The property’s crowning jewel is its heated outdoor pool, a rare spot on the South Cornish coast with a dramatic panorama of the Fowey estuary and the open sea.This outdoor oasis also boasts a spa, where a relaxation room and 12-metre indoor swimming pool both open out onto a spectacular spa terrace with an outdoor horsebox sauna. Tinside Lido, Plymouth Tinside Lido in Plymouth is often considered one of the UK’s best, with unrivalled sea viewsWith a superb view over the dark blue waters of Plymouth Hoe, Tinside Lido is a large saltwater pool that’s ginormous by UK lido standards: 55 metres in diameter.A trio of fountains provide a constant cascade of fresh water to drench yourself under, and the tiled stripes on the bottom exude art deco symmetry.There’s a cafe onsite serving hot drinks, snacks and ice cream.The Dome, Doncaster The next swimming pool up on the list is The Dome in DoncasterThe Dome is an entertainment destination for the whole family, with more than 50 activities on offer – everything from an ice rink to a fitness centre, golfing and gymnastics.But the swimming pool, The Lagoons, is the main event, with pools and flumes for kids to enjoy.Princess Diana officially opened The Dome back in 1989, and it’s been popular ever since. It even has Grade-II listed status.Cowley Manor Experimental, Cotswolds Cowley Manor Experimental’s pool blends into the natural scenerySet within the rolling Cotswolds countryside, Cowley Manor Experimental is a 17th-century manor house set across 55 acres of landscaped gardens, natural lakes, and Victorian woodland.At the heart of the estate is the C-Side Spa, which features both indoor and outdoor swimming pools, alongside a sauna, steam room, and fitness centre, creating a holistic environment for rest and restoration. Guests can swim in the Cotswold green slate indoor pool or enjoy the expansive outdoor pool surrounded by nature, with each space designed to encourage a deep sense of calm. Heckfield Place, Hampshire Heckfield Place in Hampshire is a step up from a swimming poolSet within 438 acres of secluded Hampshire countryside, Heckfield Place – a restored 18th-century family home turned hotel – is a dreamy spot to swim.While not quite a pool, from May through September, the Lower Lake becomes the perfect spot to soak up some rays and splash around.Loungers, soft towels and picnic blankets will be laid out across the lakeside, offering effortless comfort for those in the sun. A seasonal lakeside bar will also be introduced, serving botanical cocktails, chilled wines and refreshing non-alcoholic pours.Mermaid Pool, Burgh Island Hotel Unlike structured spa experiences, this pool is a real part of the natural landscapeAt coastal destinations such as Burgh Island Hotel, the Mermaid Pool offers a natural seawater swimming experience shaped by its island environment. Cold water, coastal air, tidal movement and a stronger connection to landscape are the key features here.You’ll need to book a stay at the hotel to try out this refreshing alternative to a chlorine-filled indoor pool.Shangri-La The Shard, London Shangri-La The Shard in London is home to one of the highest swimming pools in EuropeFloating 52 floors above London, Shangri-La The Shard’s Sky Pool is the highest swimming pool in London and Western Europe.It sits almost 200 metres above sea level, and offers unparalleled views across the Big Smoke, ideal for anyone wanting to enjoy a refuge from the heat without compromising on natural sunlight.One Google review read: ‘The swimming is one of the highlights, with an incredible view of London. You need to book in advance, which I appreciated as it meant it wasn’t crowded, offering a sense of privacy.’Jubilee Pool, Penzance Jubilee Pool in Penzance is one of the most attractive in the UKFew outdoor pools and lidos are quite as exquisite as Penzance’s Jubilee Pool, which has a triangular shape that looks out onto the sea.It holds around five million litres of water, and has a special children’s pool – as well as lifeguards to survey the area.Tickets start from just £4.95 for children and £7 for adults.Bristol Lido Bristol Lido first opened in 1850 – and was reopened and refurbished in 2008Bristol Lido, located in the upmarket Clifton neighbourhood, has a glamorous ambience.The restaurant and poolside bar overlook the pool – and serve standout options including Queen scallops, Spanish cheeses and champagne.It’s a historic attraction, too, having first opened in 1850.The Grove, Hertfordshire The Grove in Hertfordshire rounds out the list of the best pools in the UKSet within Hertfordshire’s rolling countryside, The Grove is a luxury escape with an outdoor offering designed for relaxed days in the sun. Within the Walled Garden, guests can unwind at Ralph’s Beach, a laid-back poolside space designed for effortless summer living. Featuring a heated outdoor pool, daybeds, a dedicated children’s pool and play area, and a relaxed bar and dining offering, it delivers a resort-style experience in a quintessentially British setting.