Girls' Swimwear | Training & Racing Swimsuits for Young Swimmers
Browse our collection of girls' swimwear designed for training, competition and club swimming. From chlorine-resistant training swimsuits to FINA-approved racing suits and kneeskins, we stock leading brands including Speedo, Arena, Funkita and TYR. Whether your daughter is starting her first club season or competing at county level, find durable, well-fitting swimwear matched to her swimming stage. Expert sizing guidance and fast UK delivery included.
Girls' Swimwear for Training & Competition
Understanding the difference between training and competition swimwear helps parents make the right choice for their daughter's swimming stage and competition requirements.
Training Swimsuits
Training swimsuits are designed for daily pool sessions, prioritising durability and comfort over race-day performance. Girls training four or five times a week place considerable demands on their swimwear, exposing fabric to repeated chlorine contact that degrades standard materials quickly. Quality training swimwear for girls uses chlorine-resistant fabrics such as PBT polyester blends that maintain shape, colour and compression through months of regular use. Comfortable strap designs, secure fits and appropriate coverage make training suits practical for squad sessions where girls need to move freely without adjusting their swimwear.
Racing & Competition Suits
Competition swimwear for girls prioritises streamlined fit and minimal drag over durability. These suits use close-fitting, low-drag fabrics that reduce water resistance during galas and club competitions. The tighter construction maintains body position in the water, helping girls achieve better times than they would in looser training swimwear. For girls competing at county level and above, FINA-approved competition suits provide the performance advantages serious competition demands. Racing suits should be reserved exclusively for competition and not worn during training, as regular pool exposure rapidly degrades the performance fabrics.
Kneeskins & Kneesuits Explained
Kneeskins extend coverage from the waist down to the knee, providing additional compression and drag reduction compared to standard one-piece racing suits. This extended coverage compresses the thighs, reducing muscle vibration and improving body position during racing. For girls, kneeskins become relevant when competing at county level and above, where marginal performance gains start to matter. Teen girls swimwear in kneeskin format offers a meaningful performance step up from standard racing suits without the extreme compression of full tech suits. Most developing club swimmers do well with standard one-piece racing suits at local galas, progressing to kneeskins when they start competing at higher levels.
Key Features to Look for in Girls' Swimwear
Quality swimwear for girls balances performance, durability and appropriate coverage for developing swimmers across a range of ages and training intensities.
Chlorine-Resistant Fabrics
Chlorine resistance is the single most important feature in training swimwear for girls who swim regularly. Standard Lycra and elastane blends degrade rapidly in chlorinated water, losing elasticity and becoming misshapen within weeks of regular use. PBT polyester fabrics and specialist chlorine-resistant blends such as Speedo Endurance+, Arena MaxLife Eco and TYR Durafast Elite maintain their properties for months of intensive training. For teenage girls swimwear that needs to survive heavy training schedules, investing in chlorine-resistant fabric pays off through significantly extended suit lifespan and consistent performance throughout the training season.
Fit, Coverage & Comfort
Appropriate fit and coverage matter considerably in swimwear for girls, particularly for those going through growth spurts and the physical changes of adolescence. One-piece swimsuits provide secure, comprehensive coverage suitable for all ages and training environments. Racerback and crossback strap designs offer different levels of shoulder mobility and support. Racerback styles maximise shoulder rotation for freestyle and butterfly swimmers, whilst crossback designs provide slightly more upper-back coverage. Internal shelf lining in quality training swimsuits provides additional coverage and structure without requiring separate underwear, an important practical consideration for girls swimming before and after school.
UV Protection
UV protection becomes relevant for girls swimming outdoors, whether at open water events, outdoor pools or summer galas. Many quality swimsuits for girls include UPF 50+ protection woven into the fabric, providing meaningful sun protection during extended outdoor sessions. This feature proves particularly valuable for girls spending considerable time on poolside between races at outdoor competition meets. Checking UPF ratings when selecting swimwear for summer outdoor swimming adds a practical safety benefit alongside the performance considerations.
Girls' Swimwear by Swimming Level
Matching swimwear to your daughter's swimming stage ensures appropriate performance features without overspending on technology she does not yet need.
Beginners & Learn to Swim (Ages 5-8)
Girls' swimwear for beginners prioritises comfort, ease of changing and fun designs that build pool confidence. At this stage, swimwear does not need performance features like compression or chlorine resistance. A comfortable, well-fitting one-piece swimsuit in a design she enjoys wearing encourages positive associations with swimming. Secure straps that stay in place during lessons matter more than fabric technology at this level. Fun prints and bright colours from brands like Funkita and Arena make swimwear exciting for younger girls who are still developing their love of the sport.
Club Swimmers & Developing Racers (Ages 8-13)
Girls at club level training several times weekly need swimwear for girls that balances performance with durability. This is the stage where chlorine-resistant training suits become a worthwhile investment, as the frequency of pool sessions accelerates fabric wear. A separate competition suit for galas makes practical sense at this level, preserving the training suit's lifespan whilst ensuring a smart, well-fitting suit for race days. Standard one-piece racing suits suit most club and county galas without needing kneeskins at this stage. Explore our girls' performance swimwear collection for competition-ready options at this level.
Competitive Teenage Girls (Ages 13-17)
Teenage girls swimwear for serious competitive swimmers requires higher performance specifications across both training and racing ranges. Intensive training schedules of six or more sessions weekly demand the most durable chlorine-resistant fabrics available. At county, regional and national levels, kneeskins and tech suits provide meaningful performance advantages. Teen girls competing at this level often begin transitioning into adult sizing ranges, where women's performance suits offer more technical options. Our staff can advise on this transition, ensuring competitive teenage girls access appropriate performance swimwear that fits correctly as they move between junior and adult specifications.
Sizing Guide for Girls' Swimwear
Correct sizing makes a significant difference to comfort, performance and longevity. Girls' swimwear sizing varies between brands, making a measurement-based approach essential when buying online.
Girls' swimwear uses two sizing systems depending on brand and product type. Age-based sizing (6-7, 8-9, 10-11 etc.) suits leisure and entry-level training swimwear, whilst numeric sizing (22, 24, 26, 28, 30) appears in competition and higher-performance training ranges. The numeric sizes refer to chest measurement in inches, providing more precise fit guidance than age categories. A girl wearing aged 10-11 clothing might correspond to a numeric 24 or 26 in competition swimwear, depending on her measurements.
To find the right size, measure her chest, waist and hips, then compare these measurements against the specific brand's size chart rather than assuming consistent sizing between brands. Arena swimwear for girls typically runs slightly smaller than Speedo equivalents, meaning she may need one size up in Arena compared to her Speedo size. Funkita sizing tends to align more closely with Speedo. For competition suits, err toward the smaller size for a snug racing fit; for training suits, choose the size matching her current measurements rather than buying ahead for growth.
The transition from girls' numeric sizing into junior or women's sizing typically occurs between ages 12 and 15, depending on body proportions. Girls with longer torsos may find adult sizing more comfortable earlier, whilst petite swimmers may remain in girls' sizing longer. Our team provides sizing guidance specific to individual measurements and brand preferences, helping parents select the right swimwear for girls at this transitional stage without the frustration of incorrect first purchases.
Popular Brands for Girls' Swimwear
Each leading swimwear brand brings distinct strengths to swimwear for girls, from training durability to competition technology and fun design aesthetics.
Speedo is the UK's most recognised swimwear brand, offering an extensive size range that covers girls from early childhood through to junior competitive sizes. Endurance+ training fabric delivers reliable chlorine resistance for regular club training, whilst Fastskin competition suits provide performance advantages for girls competing at county level and above. Speedo's sizing tends to be consistent and well-documented, making it a reliable choice when buying without trying on.
Arena brings Italian design sensibility to girls' swimwear, combining vibrant patterns with genuine performance credentials. The MaxLife Eco training fabric delivers excellent chlorine resistance whilst incorporating recycled materials. Arena Powerskin Impulso suits girls beginning their journey into competition swimwear, providing meaningful performance features without extreme compression. Arena's fun colourways prove particularly popular with younger club swimmers motivated by how their swimwear looks.
Funkita is the Australian brand known for its distinctive, eye-catching designs that stand out on any pool deck. Beyond the visual appeal, Funkita delivers genuine chlorine resistance and construction quality suited to regular training use. The brand proves particularly popular with girls who want swimwear that expresses their personality whilst performing reliably through intensive training schedules. Funkita's bold prints and quality fabrics make it a strong choice for club swimmers aged 8 to 16.
TYR produces robust training swimwear for girls with Durafast Elite fabric delivering excellent longevity under heavy chlorine exposure. TYR's training suits prove popular with competitive swimmers whose intensive schedules place maximum demands on fabric durability. The brand offers both bold prints and classic colourways, accommodating girls who prioritise either design or understated professionalism in their swimwear.
Caring for Girls' Swimwear
Proper care significantly extends the lifespan of girls' swimwear, making a worthwhile difference to replacement frequency for families where daughters train regularly.
Rinsing swimwear in cool, fresh water immediately after every swim is the single most effective care step. This removes chlorine and pool chemicals before they can bond with and degrade the fabric fibres. Even a quick rinse under the pool shower before leaving makes a meaningful difference to how long training suits retain their shape. Never use hot water for rinsing or washing, as heat accelerates elastic fibre breakdown regardless of fabric quality.
Hand washing in cool water with a gentle swimwear detergent proves kinder to fabric than machine washing, though a machine on a gentle cycle at 30 degrees works acceptably for training suits. Never tumble dry swimwear, and avoid wringing or twisting the fabric when removing water. Air drying flat or on a hanger away from direct sunlight preserves both colour and elastic properties. Rotating between two training suits allows each one to fully dry and recover between sessions, effectively doubling the lifespan of each garment. Complete your daughter's swimming kit with a quality swim towel for efficient post-swim drying.
With proper care, a quality chlorine-resistant training suit for girls should last three to six months with heavy training use of four to five sessions weekly. Signs that a training suit needs replacing include visible sagging, fabric becoming see-through when stretched, or the suit losing its shape retention after washing. Racing suits, used only for competition, can last one to two full seasons when rinsed promptly after each gala use.
Why Choose All4Swim for Girls' Swimwear
As specialists in competitive swimming, we understand what parents and young swimmers need from girls' swimwear at every stage of their development.
Specialist Knowledge: We are a swimming-specific retailer, not a general sports store. Our knowledge of competitive girls' swimwear means we can provide genuine guidance on which suits work best at different training levels, how brands compare in fit and durability, and which options represent genuine value for families investing in quality swimwear.
Comprehensive Size Range: We stock girls' swimwear from age 5 through junior competitive sizes, covering the full range from beginner one-pieces to senior-level competition kneeskins. Our range accommodates the variety of body types and sizing needs across this age group, including options for girls transitioning between junior and adult sizing.
Authentic Branded Products: Every swimsuit we sell comes from authorised brand distributors, guaranteeing authentic products with proper fabric specifications. This matters particularly for girls' competition swimwear where FINA approval and genuine technical fabric properties are essential for performance and competition eligibility.
Fast UK Delivery: We maintain UK-based stock and dispatch promptly, ensuring swimwear arrives in time for upcoming galas. Parents frequently contact us urgently before county meets or club competitions, and our fast UK delivery addresses these time-sensitive needs reliably. For more competitive options as girls progress, explore our women's performance swimwear range for teenage girls moving into senior competition.
Frequently Asked Questions
Common questions from parents and coaches about girls' swimwear answered by our swimming specialists.
What size swimsuit does my daughter need?
Measure her chest, waist and hips then compare to the brand's specific size chart. Competition swimwear uses numeric sizing (22-30) based on chest inches. Check each brand separately as sizing varies between manufacturers.
What is the difference between a training and racing swimsuit?
Training suits prioritise chlorine resistance and durability for daily sessions. Racing suits use low-drag fabrics for competition performance. Never train in racing suits as regular chlorine exposure degrades performance fabrics rapidly.
Does my daughter need a kneeskin for club galas?
A standard one-piece racing suit suits most club galas for girls. Kneeskins become relevant at county-level competition and above. For beginners and developing club swimmers, a quality racing swimsuit is appropriate and sufficient.
How long should a girls' training swimsuit last?
With regular training of four to five sessions weekly, expect three to six months from quality chlorine-resistant swimwear. Rinsing immediately after swimming and rotating between two suits extends lifespan significantly.
Which brand is best for girls who train regularly?
Speedo Endurance+ and Arena MaxLife Eco offer excellent chlorine resistance for regular training. Funkita provides strong durability with bold designs younger girls enjoy wearing. TYR Durafast Elite suits intensive training schedules particularly well.
Conclusion
Finding the right swimwear for girls transforms both training and competition experience, providing comfort, durability and appropriate performance at every swimming stage. Quality girls' swimwear matched to her level, correctly sized and properly cared for delivers consistent performance through the season. Browse our complete range of girls' swimwear from leading brands with expert sizing guidance and fast UK delivery.