The best girls swimwear depends on how she spends time in the water. Casual swimmers benefit from something comfy and easy to look after. Active laps or lessons require durability and a fit that won't budge. Fun beach days call for designs that make her want to get in the water. Our range covers it all at Decathlon.
The right fit helps girls swimwear stay comfortable, secure and easy to move in. Look for fabrics that hold their colour and shape after multiple washes and chlorine exposure. The fit should be snug enough to prevent riding up during strokes and kicks, but stretchy enough to move with her body. A well-fitting suit means she stays confident and focused on having fun rather than adjusting her gear.
Material
Choosing the right fabric keeps girls' swimwear in good shape. Chlorine-resistant blends stay vibrant through countless pool sessions and are easy to maintain. Nylon stretches beautifully and feels comfortable against skin, though they ask for gentler washing. Polyester is the most durable option, resisting fading and wear through heavy use and saltwater swimming. Our girls' swimwear uses quality chlorine-resistant fabrics that survive both chlorine pools and holiday beach days.
Comfort
Run your hands over the seams and fabric surface, soft finishes matter because she'll be wearing this for hours. The leg openings and shoulder straps shouldn't dig in or slip about. Look for flatlock seams that won't create pressure points or irritation. Fresh water rinses after each session keep the fabric soft and prevent chlorine damage. After a few washes the fabric will soften even more and feel even more comfortable.
Size Range
Sizing matters most for growing girls. Go snug for best performance but replace more often, or size up slightly to get two seasons from it. Think about her growth rate and what works for your budget.
First-time swimmers. Perfect for girls just getting into water or learning to swim. Our starter range keeps her comfortable in the pool, holds up to frequent washing, and offers good value for growing swimmers.
Regular swimmers. Swimming multiple times a week means regular chlorine exposure. Our mid-range swimwear is built to handle that without losing shape or colour, and it holds up through frequent washing.
Competitive and active swimmers. Training hard or racing means your swimsuit needs to deliver. Our performance range is designed for serious swimming, stays put through intense strokes, and stays secure through intense swimming sessions and supports comfortable movement in the water.
How to care for your girls swimwear
Wash out chlorine and salt straight away before they damage the fabric. Hand wash only in cool water with mild detergent because machine washing can damage the elastic and affect the fit. Air dry flat before storing. Keep it shaded away from sun exposure which fades colours and weakens materials. For deeper cleaning, soak briefly in cool water with mild detergent, rinse thoroughly and air dry. Roll rather than fold for storage. Comes with a 2-year warranty.
Girls swimwear by type
Type
Best for
Beginner and casual girls swimwear
First-time swimmers, casual pool play, occasional use.
Regular swimmers, all-round swimming styles, frequent pool visits.
Snug through the chest and torso so she feels supported for swimming strokes without being tight. Girls' body measurements vary widely, so fit her actual size rather than just going by age. If she's between sizes, size up on the swimwear to get an extra season of wear as she grows.
Should she get one-piece or two-piece girls swimwear?
One-piece girls swimwear offers more stability and coverage for active swimmers and longer sessions. Two-piece gives more flexibility and is what older girls usually prefer. Let her comfort and what she wants guide the choice. Good swimwear fits well in either style.
What girls swimwear works best for sensitive skin?
How long will girls swimwear last?
What swimwear is best for girls who swim regularly?
Look for soft, chlorine-resistant fabrics with smooth seams that won't rub or irritate. The fit should be snug enough to be secure but not tight. Rinse her straight after swimming so chlorine doesn't sit on her skin.
Usually 1 to 2 seasons. She'll probably outgrow it before it wears out. Watch for fading, loose elastics, and pilling. Size generously to account for growth. Comes with a 2-year warranty.
Go for chlorine-resistant fabrics. They actually handle pool chemicals without falling apart and keep their colour and shape through many seasons. Perfect for girls who practically live in the pool.
Built to Last Through The Season
Quality girls swimwear keeps up with regular pool sessions. Our range doesn't lose its shape or colour quickly, so you're not replacing it mid-season. Made for swimmers at every level, from first-timers to those training seriously. Shop online or visit Decathlon stores. 2-year warranty on all items.
All SportsMenWomenKidsAccessoriesEquipment and LeisureHealth & NutritionBest DealsNew ArrivalsMarketplace
Hiking & Trekking
Swimming
Cycling
Fitness (Yoga/Pilates)
Camping
Running