307 items
2 colors
£12.99
Rate: 4.6 stars, 143 votes
2 colors
£16.99
2 colors
£19.99
4 colors
£14.99£19.99
2 colors
£10.99
2 colors
£19.99
3 colors
£11.99£15.99
£18.99
Rate: 4.7 stars, 1198 votes
2 colors
£3.99
Was £4.99
£18.99
Rate: 4.7 stars, 140 votes
5 colors
£9.99£16.99
Rate: 4.8 stars, 16 votes
3 colors
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£13.00
6 colors
£9.99£15.99
2 colors
£9.99£15.99
Rate: 4.5 stars, 1020 votes
7 colors
£6.49£9.99
Sold and shipped by theSwimmingShop
£21.95£26.40
£9.99
3 colors
£14.99
Sold and shipped by SPEEDO INTERNATIONAL LIMITED
£19.99£23.00
Rate: 4.8 stars, 48 votes
2 colors
£9.99£15.99
4 colors
Sold and shipped by ProSwimwear LTD
£17.99£19.99
4 colors
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£18.00
Sold and shipped by Regatta Ltd UK
£14.95£25.00
4 colors
Sold and shipped by Pertemba GB
£20.99
2 colors
Sold and shipped by ProSwimwear LTD
£16.19£17.99
Sold and shipped by Regatta Ltd UK
£24.95£50.00
Sold and shipped by Regatta Ltd UK
£24.95£50.00
4.5/5 based on 12223 reviews collected online and in stores

Girls Swimming Costume 

Every swim session is an adventure, and the right swimwear makes all the difference. With our Decathlon girls swimming costume range, we offer just that blend of comfort, style, and functionality. Whether you’re looking for chlorine resistance, extra coverage or simply maximum mobility, you’ll find your fit in our range.

A Diverse Range to Explore 

While our swimming costumes are an essential, there are other swimwear options to consider. For those sunny days by the pool or beach, our girls bikinis offer a stylish alternative. These are perfect for a mix of water fun and relaxation under the sun.

For additional protection against the sun or cooler waters, consider exploring our range of girls rash vests. These provide an added layer of safety against potential scrapes and UV rays, ensuring she can play worry-free.

And if you’re keen on having coordinated outfits, our girls bikini sets simplify the choice. Handpicked designs guarantee she looks her best, whether she's in the pool or by the sea. Discover the joy of swimming with our selection. Whether she's learning the basics or refining her strokes, ensure she has the best with Decathlon's girls swimming costume range.