Indoor swimming pool: Campgrounds
218 bookable campgrounds
[[ campsite.hierarchy ]]
This park does not currently take bookings here on Pitchup.com.
- Well-maintained 55+ RV resort in Lake County, Florida
- A 10-minute drive from Leesburg; Walt Disney World Resort 50 minutes
- Two pools plus a pickleball court, yacht club and miniature golf
FHU grass and sand travel trailer site 4 x From £44.84/€53/A$79.58/$56/CA$71.90/CHF54.60/SEK556.71/DKK394.35/NOK545.63/ISK7,353/ARS6,632.84/CLP46,844/PEN208.46/NZ$87.41/ZAR886.94/PLN245.45/R$273.38/CZK1,305.83/RSD6,228/HUF20,383.91/RUB3,472/CN¥374.81 per night
- Relaxed, rural park a 15-minute drive from downtown New Bern
- Within 15 minutes of the Trent and Neuse rivers
- Indoor pool, hot tub, games room, fitness center and fishing pond
FHU grass and gravel site 4 x From £40.04/€47.32/A$71.06/$50/CA$64.20/CHF48.75/SEK497.06/DKK352.10/NOK487.17/ISK6,566/ARS5,922.18/CLP41,825/PEN186.12/NZ$78.04/ZAR791.91/PLN219.15/R$244.08/CZK1,165.92/RSD5,561/HUF18,199.92/RUB3,100/CN¥334.65 per night
- Family-friendly and friendly site near La Pointe de la Torche
- Under 3km from the famed sand and surf beach of Treguennec
- Pool, mussel and crêpe takeaways and converted caravan games room
Primitive grass tent site 6 x From £13.54/€16/A$24.02/$16.91/CA$21.71/CHF16.48/SEK168.06/DKK119.05/NOK164.71/ISK2,220/ARS2,002.30/CLP14,141/PEN62.93/NZ$26.39/ZAR267.75/PLN74.09/R$82.53/CZK394.20/RSD1,880/HUF6,153.44/RUB1,048.12/CN¥113.15 per night Powered grass site 6 x From £16.50/€19.50/A$29.28/$20.60/CA$26.45/CHF20.09/SEK204.82/DKK145.09/NOK200.74/ISK2,705/ARS2,440.31/CLP17,235/PEN76.70/NZ$32.16/ZAR326.32/PLN90.30/R$100.58/CZK480.43/RSD2,291/HUF7,499.50/RUB1,277.39/CN¥137.90 per night
- Dog-friendly site two kilometres from Erquy’s sandstone houses
- A five-minute drive from the beach and 15 minutes from Cap d'Erquy
- Facilities include a pool, bar, washing-up area and washing machines
Primitive grass site 6 x From £15.23/€18/A$27.03/$19.02/CA$24.42/CHF18.54/SEK189.07/DKK133.93/NOK185.30/ISK2,497/ARS2,252.59/CLP15,909/PEN70.80/NZ$29.68/ZAR301.22/PLN83.36/R$92.84/CZK443.48/RSD2,115/HUF6,922.62/RUB1,179.13/CN¥127.29 per night Powered grass site 6 x From £17.77/€21/A$31.53/$22.19/CA$28.49/CHF21.63/SEK220.58/DKK156.25/NOK216.18/ISK2,914/ARS2,628.02/CLP18,560/PEN82.59/NZ$34.63/ZAR351.42/PLN97.25/R$108.32/CZK517.39/RSD2,468/HUF8,076.39/RUB1,375.65/CN¥148.50 per night Powered grass site (jumbo) 7 x From £19.46/€23/A$34.53/$24.30/CA$31.20/CHF23.69/SEK241.58/DKK171.13/NOK236.77/ISK3,191/ARS2,878.31/CLP20,328/PEN90.46/NZ$37.93/ZAR384.89/PLN106.51/R$118.63/CZK566.66/RSD2,703/HUF8,845.57/RUB1,506.67/CN¥162.65 per night
- Family-friendly site in a natural park, two minutes from Heiderscheid
- A 10-minute drive from swims, watersports and walks at Upper-Sûre Lake
- Several playgrounds both indoors and out; kids' activities in summer
Powered grass site 6 x From £15.23/€18/A$27.03/$19.02/CA$24.42/CHF18.54/SEK189.07/DKK133.93/NOK185.30/ISK2,497/ARS2,252.59/CLP15,909/PEN70.80/NZ$29.68/ZAR301.22/PLN83.36/R$92.84/CZK443.48/RSD2,115/HUF6,922.62/RUB1,179.13/CN¥127.29 per night Powered grass site (comfort) 6 x From £16.07/€19/A$28.53/$20.07/CA$25.78/CHF19.57/SEK199.57/DKK141.37/NOK195.60/ISK2,636/ARS2,377.73/CLP16,793/PEN74.73/NZ$31.33/ZAR317.95/PLN87.99/R$98/CZK468.11/RSD2,233/HUF7,307.21/RUB1,244.64/CN¥134.36 per night
- In spectacularly scenic surroundings with views of the Picos de Europa
- In the Oyambre Natural Park, 15 minutes' walk from the beach
- Outdoor pool, playground, café and restaurant
Power optional grass site (comfort) 6 x From £20.73/€24.50/A$36.79/$25.89/CA$33.24/CHF25.24/SEK257.34/DKK182.29/NOK252.21/ISK3,399/ARS3,066.03/CLP21,654/PEN96.36/NZ$40.40/ZAR409.99/PLN113.46/R$126.37/CZK603.62/RSD2,879/HUF9,422.45/RUB1,604.93/CN¥173.25 per night Power optional grass site (premium) 6 x From £20.73/€24.50/A$36.79/$25.89/CA$33.24/CHF25.24/SEK257.34/DKK182.29/NOK252.21/ISK3,399/ARS3,066.03/CLP21,654/PEN96.36/NZ$40.40/ZAR409.99/PLN113.46/R$126.37/CZK603.62/RSD2,879/HUF9,422.45/RUB1,604.93/CN¥173.25 per night
- Family-oriented static caravans on the shore of Lake Jaunay
- A 20-minute drive to Saint Gilles Croix de Vie; an hour to Puy du Fou
- Waterpark, kids' club, climbing wall and watersports on site
Mercure Plus 2 bedroom mobile home 5 x From £49.07/€58/A$87.09/$61.28/CA$78.68/CHF59.75/SEK609.21/DKK431.54/NOK597.08/ISK8,047/ARS7,258.35/CLP51,262/PEN228.12/NZ$95.65/ZAR970.58/PLN268.59/R$299.16/CZK1,428.98/RSD6,816/HUF22,306.21/RUB3,799.43/CN¥410.15 per night Cordelia S7 3 bedroom mobile home 7 x From £57.53/€68/A$102.10/$71.85/CA$92.25/CHF70.05/SEK714.25/DKK505.95/NOK700.03/ISK9,434/ARS8,509.79/CLP60,100/PEN267.45/NZ$112.14/ZAR1,137.92/PLN314.90/R$350.73/CZK1,675.35/RSD7,991/HUF26,152.11/RUB4,454.50/CN¥480.87 per night Apollo S7 3 bedroom mobile home 7 x From £69.37/€82/A$123.12/$86.64/CA$111.24/CHF84.47/SEK861.30/DKK610.11/NOK844.15/ISK11,377/ARS10,261.80/CLP72,473/PEN322.51/NZ$135.23/ZAR1,372.20/PLN379.73/R$422.94/CZK2,020.28/RSD9,636/HUF31,536.36/RUB5,371.60/CN¥579.87 per night
- Woodland setting close to the coast and ancient salt marshes
- Easy access to Loire Valley vineyard days
- Covered heated pool, restaurant, café and grocery shop
Powered grass site 6 x From £14.38/€17/A$25.53/$17.96/CA$23.06/CHF17.51/SEK178.56/DKK126.49/NOK175.01/ISK2,359/ARS2,127.45/CLP15,025/PEN66.86/NZ$28.04/ZAR284.48/PLN78.73/R$87.68/CZK418.84/RSD1,998/HUF6,538.03/RUB1,113.62/CN¥120.22 per night Loisirs 2 bedroom mobile home 4 x From £49.92/€59/A$88.59/$62.34/CA$80.04/CHF60.78/SEK619.72/DKK438.98/NOK607.37/ISK8,186/ARS7,383.49/CLP52,145/PEN232.05/NZ$97.30/ZAR987.32/PLN273.22/R$304.31/CZK1,453.61/RSD6,933/HUF22,690.80/RUB3,864.93/CN¥417.23 per night Authentique 2 bedroom mobile home (comfort) 4 x From £58.38/€69/A$103.60/$72.90/CA$93.60/CHF71.08/SEK724.75/DKK513.39/NOK710.32/ISK9,573/ARS8,634.93/CLP60,984/PEN271.38/NZ$113.79/ZAR1,154.66/PLN319.53/R$355.89/CZK1,699.99/RSD8,108/HUF26,536.70/RUB4,520.01/CN¥487.94 per night Emotion 3 bedroom mobile home 6 x From £62.61/€74/A$111.11/$78.19/CA$100.39/CHF76.23/SEK777.27/DKK550.59/NOK761.79/ISK10,267/ARS9,260.65/CLP65,403/PEN291.05/NZ$122.04/ZAR1,238.33/PLN342.69/R$381.68/CZK1,823.18/RSD8,696/HUF28,459.65/RUB4,847.54/CN¥523.30 per night
- Family-friendly caravan park in pine forest near Biarritz in Aquitaine
- A 35-minute drive to central Biarritz; 30 minutes to Cité de l’Océan
- Pool complex, spa and games on site, plus a bar and restaurant
Mercure 2 bedroom mobile home (semi-sheltered balcony) 5 x From £42.30/€50/A$75.07/$52.83/CA$67.83/CHF51.50/SEK525.18/DKK372.02/NOK514.72/ISK6,937/ARS6,257.20/CLP44,191/PEN196.65/NZ$82.46/ZAR836.71/PLN231.54/R$257.89/CZK1,231.88/RSD5,876/HUF19,229.49/RUB3,275.37/CN¥353.58 per night Mercure Plus 2 bedroom mobile home (semi-sheltered balcony) 5 x From £47.38/€56/A$84.08/$59.17/CA$75.97/CHF57.69/SEK588.20/DKK416.66/NOK576.49/ISK7,769/ARS7,008.06/CLP49,494/PEN220.25/NZ$92.35/ZAR937.11/PLN259.33/R$288.84/CZK1,379.70/RSD6,581/HUF21,537.03/RUB3,668.41/CN¥396.01 per night Cordelia 3 bedroom mobile home (semi-sheltered balcony) 7 x From £51.61/€61/A$91.59/$64.45/CA$82.75/CHF62.84/SEK640.72/DKK453.86/NOK627.96/ISK8,463/ARS7,633.78/CLP53,913/PEN239.92/NZ$100.60/ZAR1,020.78/PLN282.48/R$314.63/CZK1,502.89/RSD7,168/HUF23,459.98/RUB3,995.95/CN¥431.37 per night Apollo S7 3 bedroom mobile home (semi-sheltered balcony) 7 x From £67.68/€80/A$120.12/$84.53/CA$108.53/CHF82.41/SEK840.29/DKK595.23/NOK823.56/ISK11,099/ARS10,011.51/CLP70,706/PEN314.65/NZ$131.93/ZAR1,338.73/PLN370.47/R$412.63/CZK1,971/RSD9,401/HUF30,767.19/RUB5,240.59/CN¥565.73 per night
- Family-friendly site on the stunning Brittany coast
- Sandy beach; long-distance hikes and bike rides within 5 mins' walk
- Indoor pool, outdoor pool with slides, bike hire, babysitting service
Primitive grass site 6 x From £12.69/€15/A$22.52/$15.85/CA$20.35/CHF15.45/SEK157.55/DKK111.61/NOK154.42/ISK2,081/ARS1,877.16/CLP13,257/PEN59/NZ$24.74/ZAR251.01/PLN69.46/R$77.37/CZK369.56/RSD1,763/HUF5,768.85/RUB982.61/CN¥106.07 per night Powered grass site 6 x From £16.92/€20/A$30.03/$21.13/CA$27.13/CHF20.60/SEK210.07/DKK148.81/NOK205.89/ISK2,775/ARS2,502.88/CLP17,676/PEN78.66/NZ$32.98/ZAR334.68/PLN92.62/R$103.16/CZK492.75/RSD2,350/HUF7,691.80/RUB1,310.15/CN¥141.43 per night
- Woodland setting with two well-stocked fishing lakes
- Indoor pool, fitness suite and family-friendly bar on site
- Seven miles from the Suffolk Heritage Coast at Aldeburgh
Camping pod (2 adults and 2 children) 4 x From £36/€42.55/A$63.89/$44.96/CA$57.73/CHF43.83/SEK446.95/DKK316.60/NOK438.05/ISK5,904/ARS5,325.06/CLP37,608/PEN167.36/NZ$70.17/ZAR712.06/PLN197.05/R$219.47/CZK1,048.36/RSD5,000/HUF16,364.86/RUB2,787.43/CN¥300.91 per night
- Lakeside site surrounded by lavender fields and vineyards
- Lake swimming, heated pool, spa and canoeing trips all available
- Playground, games and restaurant/bar with terrace facing the lake
Powered grass site 6 x From £13.54/€16/A$24.02/$16.91/CA$21.71/CHF16.48/SEK168.06/DKK119.05/NOK164.71/ISK2,220/ARS2,002.30/CLP14,141/PEN62.93/NZ$26.39/ZAR267.75/PLN74.09/R$82.53/CZK394.20/RSD1,880/HUF6,153.44/RUB1,048.12/CN¥113.15 per night Powered grass site (waterside) 6 x From £19.46/€23/A$34.53/$24.30/CA$31.20/CHF23.69/SEK241.58/DKK171.13/NOK236.77/ISK3,191/ARS2,878.31/CLP20,328/PEN90.46/NZ$37.93/ZAR384.89/PLN106.51/R$118.63/CZK566.66/RSD2,703/HUF8,845.57/RUB1,506.67/CN¥162.65 per night
- Family-run site five minutes' drive from Thiviers in the Périgord
- Half an hour's drive from Château de Puyguilhem and the Villars Cave
- Swimming pool and paddling pool with covered and open areas
Powered grass site 10 x From £15.23/€18/A$27.03/$19.02/CA$24.42/CHF18.54/SEK189.07/DKK133.93/NOK185.30/ISK2,497/ARS2,252.59/CLP15,909/PEN70.80/NZ$29.68/ZAR301.22/PLN83.36/R$92.84/CZK443.48/RSD2,115/HUF6,922.62/RUB1,179.13/CN¥127.29 per night
- Family-friendly site in the Northern Vosges Regional Natural Park
- A 45-minute drive to Strasbourg; 25 minutes to Maginot Line
- Indoor pool, hot tub, sauna, play area and summer restaurant
Power optional grass tent site (no cars) 1 x From £6.35/€7.50/A$11.26/$7.92/CA$10.17/CHF7.73/SEK78.78/DKK55.80/NOK77.21/ISK1,041/ARS938.58/CLP6,629/PEN29.50/NZ$12.37/ZAR125.51/PLN34.73/R$38.68/CZK184.78/RSD881/HUF2,884.42/RUB491.31/CN¥53.04 per night Primitive grass site 6 x From £12.69/€15/A$22.52/$15.85/CA$20.35/CHF15.45/SEK157.55/DKK111.61/NOK154.42/ISK2,081/ARS1,877.16/CLP13,257/PEN59/NZ$24.74/ZAR251.01/PLN69.46/R$77.37/CZK369.56/RSD1,763/HUF5,768.85/RUB982.61/CN¥106.07 per night Powered grass site 6 x From £16.07/€19/A$28.53/$20.07/CA$25.78/CHF19.57/SEK199.57/DKK141.37/NOK195.60/ISK2,636/ARS2,377.73/CLP16,793/PEN74.73/NZ$31.33/ZAR317.95/PLN87.99/R$98/CZK468.11/RSD2,233/HUF7,307.21/RUB1,244.64/CN¥134.36 per night
- Family run for over 40 years, two miles from the beach at New Quay
- Fishing lake surrounded by acres of peaceful space
- Pool, play areas, arcade, kids' club and clubhouse with two bars
Powered gravel and cement/asphalt travel trailer site 6 x From £15/€17.73/A$26.62/$18.73/CA$24.05/CHF18.26/SEK186.23/DKK131.92/NOK182.52/ISK2,460/ARS2,218.77/CLP15,670/PEN69.73/NZ$29.24/ZAR296.69/PLN82.10/R$91.45/CZK436.82/RSD2,083/HUF6,818.69/RUB1,161.43/CN¥125.38 per night
- Well-equipped caravans at a canal junction two miles from Alrewas
- Twycross Zoo and Drayton Manor Theme Park within a half-hour drive
- Adventure play area, tennis court, café and indoor pool on site
Platinum 2 bedroom mobile home 5 x From £272/€321.50/A$482.73/$339.69/CA$436.14/CHF331.18/SEK3,376.93/DKK2,392.09/NOK3,309.68/ISK44,604/ARS40,233.76/CLP284,148/PEN1,264.49/NZ$530.20/ZAR5,380.03/PLN1,488.83/R$1,658.25/CZK7,920.96/RSD37,780/HUF123,645.59/RUB21,060.61/CN¥2,273.53 per 3 nights
- Friendly site 800 metres from the beach and shops of Les Becs
- Close to seaside towns Saint-Jean-de-Monts and Saint-Hilaire-de-Riez
- Indoor pool complex with spa, solarium and heated outdoor pool
Powered grass site 6 x From £17.34/€20.50/A$30.78/$21.66/CA$27.81/CHF21.12/SEK215.33/DKK152.53/NOK211.04/ISK2,844/ARS2,565.45/CLP18,118/PEN80.63/NZ$33.81/ZAR343.05/PLN94.93/R$105.74/CZK505.07/RSD2,409/HUF7,884.09/RUB1,342.90/CN¥144.97 per night 2 bedroom mobile home 5 x From £60.91/€72/A$108.11/$76.07/CA$97.67/CHF74.17/SEK756.26/DKK535.71/NOK741.20/ISK9,989/ARS9,010.36/CLP63,635/PEN283.18/NZ$118.74/ZAR1,204.86/PLN333.42/R$371.37/CZK1,773.90/RSD8,461/HUF27,690.47/RUB4,716.53/CN¥509.16 per night
- Well-equipped park set seven kilometres from Benidorm
- Five-minute drive to L’Alfàs del Pi and the beach at L’Albir
- Indoor and outdoor pools, spa, sauna and Jacuzzi, restaurant and bar
Power optional cement/asphalt and grass site 5 x From £15.44/€18.25/A$27.40/$19.28/CA$24.76/CHF18.80/SEK191.69/DKK135.79/NOK187.87/ISK2,532/ARS2,283.88/CLP16,130/PEN71.78/NZ$30.10/ZAR305.40/PLN84.51/R$94.13/CZK449.63/RSD2,145/HUF7,018.76/RUB1,195.51/CN¥129.06 per night
- Family-run site in mature woodland among the French Alps
- Close to Tour de France routes and Écrins National Park
- Heated pool, sunbathing area, playground and restaurant
Power optional grass site 6 x From £20.73/€24.50/A$36.79/$25.89/CA$33.24/CHF25.24/SEK257.34/DKK182.29/NOK252.21/ISK3,399/ARS3,066.03/CLP21,654/PEN96.36/NZ$40.40/ZAR409.99/PLN113.46/R$126.37/CZK603.62/RSD2,879/HUF9,422.45/RUB1,604.93/CN¥173.25 per night Fleuri 2 bedroom lodge 5 x From £76.14/€90/A$135.13/$95.09/CA$122.09/CHF92.71/SEK945.33/DKK669.64/NOK926.50/ISK12,486/ARS11,262.95/CLP79,544/PEN353.98/NZ$148.42/ZAR1,506.08/PLN416.78/R$464.21/CZK2,217.38/RSD10,576/HUF34,613.08/RUB5,895.66/CN¥636.45 per night Belledonne 3 bedroom mobile home 6 x From £93.06/€110/A$165.16/$116.22/CA$149.23/CHF113.31/SEK1,155.40/DKK818.44/NOK1,132.39/ISK15,261/ARS13,765.83/CLP97,220/PEN432.64/NZ$181.41/ZAR1,840.76/PLN509.40/R$567.36/CZK2,710.13/RSD12,926/HUF42,304.88/RUB7,205.81/CN¥777.88 per night
- Peaceful and friendly site 10 minutes' drive from Brittany beaches
- 500 metres from Pont-Scorff and 15 minutes' drive from Lorient
- Covered and heated pool, huge play area, barbecues and guest kitchen
Powered grass site 6 x From £22/€26/A$39.04/$27.47/CA$35.27/CHF26.78/SEK273.10/DKK193.45/NOK267.66/ISK3,607/ARS3,253.74/CLP22,979/PEN102.26/NZ$42.88/ZAR435.09/PLN120.40/R$134.10/CZK640.58/RSD3,055/HUF9,999.34/RUB1,703.19/CN¥183.86 per night
The sheer simplicity of back to basics camping – field, tent, sleep, repeat – is a blessing for folk whose synapses have been doing overtime dealing with work, constant connection and life in general (if you fancy a taste of that approach, have a look at our wild-style campsites here). But – and we’ve got to be honest here – it’s not always what you’re in the mood for, especially if you’re holidaying with kids who need to be entertained.
And that’s where our collection of campsites with indoor pools comes in. Read on for our top three reasons why indoor pools make an excellent addition to outdoor breaks, or scroll down to our tips on campsite pool etiquette and how to find a perfect site with a pool if you need no convincing.
Swimming is one of the most inclusive sports out there – regardless of age or ability, once you’ve mastered the basics you’re free to take a dip pretty much anywhere. It also helps to burn calories (not that you should be overly worried about that – we’re talking about holidays here after all…).
As it’s a low-impact activity that won’t leave your body in need of hours of recovery time, swimming is easily compatible with a wide range of holidays, whether you’re planning on spending almost all your time by the pool or are just an occasional swimmer.
The rest is up to you – your swims can follow a rigorous regime (for which there are plenty of handy training apps you can download straight to your phone), or you can freestyle the whole time.
Picking a campsite with an indoor swimming pool makes excellent sense if you’ve got kids to entertain. Of course, you’ll come along with plans for all the days out you’ll want to pack into your break too, but sometimes you’ll need a straightforward (and cheap) way to fill a few hours in between.
As a rule, a having access to an inside pool is pretty enjoyable in and of itself, but if you’re looking for something particularly entertaining you might want to look for specific facilities alongside it:
An excellent all-weather option
An indoor pool really comes into its own when the weather takes a turn, whether you want a way to stay active when holidaying in the chillier off-season months or are scouting out a back-up option for a beachside break.
Because it’s not weather-reliant, an indoor or covered pool is also more likely to be open for a longer chunk of the season rather than being a facility that’s only used in the height of summer (something worth bearing in mind for Easter or half-term breaks).
Top tips for a smooth trip
Indoor pool etiquette
Pool rules vary from country to country and from site to site. In France, for instance, male guests will almost certainly be asked to wear speedo-style briefs rather than roomier trunks or board shorts, with similar rules applying to swimming caps in countries like Italy and Belgium too.
Once you’ve sorted out what you need to wear, there’s the question of what is and isn’t allowed at your site’s indoor pool. Spitting, bombing and ducking are (for obvious reasons) shunned almost everywhere, but some pools will be more relaxed about splashing and bringing along floats or toys.
As a general rule, big covered waterparks where you can clamber over islands and get splashed by fountains will be more likely to tolerate such behaviour, while campsites with pools that are divided into neat and tidy lanes will probably want to avoid any disruption to the flow. If in doubt, check with site staff before heading to the changing rooms.
Running, jumping and glass by the pool are all out. Make sure that there is a lifeguard on duty, especially if you’re not yet a confident swimmer. Don’t let kids swim unsupervised – generally swimming is a very safe sport, but accidents do happen, especially when there isn’t an adult around making sure nothing’s going wrong.
Also remember that pools can be vectors for coughs, colds and verrucas, so stay well away from the pool if you’ve developed any tell-tale symptoms during your trip.
Find what you’re looking for…
If a campsite has seen fit to invest in something as fancy as an indoor pool, it’s likely that the owners will have given a fair amount of attention to other facilities too. Because of this, it shouldn’t be difficult to find a site with the right combination of an outdoor pool and other amenities near you.
Perhaps you’d like to add a touch of convenience to your poolside break by looking out for a place with a bar, a play area or a café (a handy feature for folk who aren’t entirely sure of their camping stove skills). Whatever you’re looking for, use our tick-box filters to find a campsite or glampsite with an outdoor pool for a wide range of destinations and budgets. Popular options include:
…then pack up and go
As well as packing your regular kit (for which you’ll want to see our ultimate camping checklist), have a think about the things you’ll want to bring along on a holiday with an indoor pool. Use the list below to avoid a panicked dash to the nearest sports shop on arrival:
Swimming costume/swimming trunks (special rules apply in certain countries)
A swimming cap
Swimming goggles (chlorinated pools may make your eyes sore without them)
Inflatable armbands (especially if there’s a novice in your group)
Shower gel (for before and after your swim)
Moisturiser (all the chemicals in indoor pools can leave the skin feeling dry)
Coins (for lockers)
A water bottle (it seems silly, but swimmers often get dehydrated)
A woggle/noodle/lightsaber (relaxed pools may allow toys like this; they go by many different names…)