Swimwear & Beachwear

Sun, sand and swimsuits for little ones
79 items
OLAIAN Kids' Steamer Full Wetsuit 100 4/3
OLAIAN Kids' Steamer Full Wetsuit 100 4/3
Rate: 4.3 stars, 193 votes
£54.99
Was £64.99
OLAIAN Kids' short sleeve fleece T-shirt - Blue
OLAIAN Kids' short sleeve fleece T-shirt - Blue
Rate: 4.3 stars, 279 votes
£12.99
OLAIAN Kids' full wetsuit 100 2/2 - Navy
OLAIAN Kids' full wetsuit 100 2/2 - Navy
Rate: 4.1 stars, 210 votes
£39.99
OLAIAN 100 Surf Shorty kids' Wetsuit 1.5mm neoprene - Purple/Pink
OLAIAN 100 kid's 1.5mm neoprene blue Shorty Surfing wetsuit
Gallery item 1 out of 2
OLAIAN 100 Surf Shorty kids' Wetsuit 1.5mm neoprene - Purple/Pink
Rate: 4.5 stars, 2053 votes
2 colors
£14.99
OLAIAN BOY'S SURFING WETSUIT 500 4/3 MM VORTEX BLACK
OLAIAN BOY'S SURFING WETSUIT 500 4/3 MM VORTEX BLACK
£79.99
Was £99.99
OLAIAN Kid's anti-UV sun top red
OLAIAN Kid's anti-UV sun top blue turquoise
OLAIAN Kid's anti-UV sun top yellow
OLAIAN Kids' UV Protection Sun Top - Coral
Gallery item 1 out of 4
OLAIAN Kid's anti-UV sun top red
Rate: 4.7 stars, 304 votes
4 colors
£8.99
OLAIAN Kids' UV protection long sleeve T-shirt - blue
OLAIAN Kids' UV protection long sleeve T-shirt - blue
Rate: 4.7 stars, 126 votes
£6.49£9.99
OLAIAN Girl's anti-UV long-sleeved T-shirt - 500 - Orchid purple
OLAIAN Girl's anti-UV long-sleeved T-shirt - 500 Rainbow stripes turquoise
OLAIAN Girls’ anti-UV long-sleeved T-shirt - 500 Shiso black
OLAIAN Girl's long sleeve sun top petrol peony
Gallery item 1 out of 4
OLAIAN Girl's anti-UV long-sleeved T-shirt - 500 - Orchid purple
Rate: 4.6 stars, 110 votes
4 colors
£14.99
OLAIAN SWIM SHORTS 100 KATY BLACK
OLAIAN SWIMMING SHORTS 100 KATY PINK
OLAIAN SWIMMING SHORTS 100 KATY COCO
OLAIAN Girl's swim shorts - 100 Katy rainbow stripes turquoise
OLAIAN Girl's swim shorts - 100 Katy shiso black
OLAIAN girls swimming shorts KATY khaki
Gallery item 1 out of 6
OLAIAN SWIM SHORTS 100 KATY BLACK
Rate: 4.7 stars, 222 votes
6 colors
£6.99£12.99
OLAIAN One-piece long-sleeved swimsuit turquoise
OLAIAN One-piece long-sleeved swimsuit Storm blue
Gallery item 1 out of 2
OLAIAN One-piece long-sleeved swimsuit turquoise
Rate: 4.7 stars, 73 votes
2 colors
£19.99
OLAIAN GIRL'S LANA TEXTURED SWIMSUIT CROP TOP 500 STRAWBERRY
OLAIAN GIRL'S SWIMSUIT CROP TOP LANA TEXTURE 500 MELON
OLAIAN GIRL'S LANA TEXTURED SWIMSUIT CROP TOP 500 LAVENDER
OLAIAN Girl's textured swimsuit crop top - 500 Lana black
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OLAIAN GIRL'S LANA TEXTURED SWIMSUIT CROP TOP 500 STRAWBERRY
Rate: 4.1 stars, 56 votes
4 colors
£6.99£12.99
OLAIAN Girl's anti-UV short-sleeved T-shirt - 500 Palm white
OLAIAN Girl's anti-UV short-sleeved T-shirt - 500 Palm white
Rate: 4.7 stars, 122 votes
£12.99
OLAIAN swim shorts 550 - blue
OLAIAN swim shorts 550 - purple
OLAIAN swim shorts 550 black green
OLAIAN Boy's swim shorts - 550 Softgeo blue
OLAIAN Boy's swim shorts - 550 Canopy orange
OLAIAN Swim shorts 550 offshore green
Gallery item 1 out of 6
OLAIAN swim shorts 550 - blue
Rate: 4.6 stars, 218 votes
6 colors
£9.99£14.99
OLAIAN GIRL'S ONE-PIECE CALYSTA SWIMSUIT 900 BLACK GOLD
OLAIAN Girl's 1-piece swimsuit - 900 Calysta shiso black
Gallery item 1 out of 2
OLAIAN GIRL'S ONE-PIECE CALYSTA SWIMSUIT 900 BLACK GOLD
2 colors
£19.99
OLAIAN GIRL'S SURFING WETSUIT 500 4/3 MM BLACK RED
OLAIAN GIRL'S SURFING WETSUIT 500 4/3 MM BLACK RED
Rate: 5.0 stars, 1 votes
£79.99
Was £99.99
OLAIAN GIRL'S HIGH-WAISTED BAO SWIMSUIT BOTTOMS 500 MELON
OLAIAN GIRL'S HIGH-WAISTED BAO SWIMSUIT BOTTOMS 500 STRAWBERRY
OLAIAN GIRL'S HIGH-WAISTED BAO SWIMSUIT BOTTOMS 500 LAVENDER
OLAIAN Girl's textured swimsuit bottom - 500 bao black
Gallery item 1 out of 4
OLAIAN GIRL'S HIGH-WAISTED BAO SWIMSUIT BOTTOMS 500 MELON
Rate: 4.6 stars, 47 votes
4 colors
£7.99£12.99
OLAIAN kids’ surfing anti-UV long-sleeved printed water T-shirt - pink
OLAIAN kids’ surfing anti-UV long-sleeved printed water T-shirt - blue
Gallery item 1 out of 2
OLAIAN kids’ surfing anti-UV long-sleeved printed water T-shirt - pink
Rate: 4.8 stars, 345 votes
2 colors
£9.99
OLAIAN BOY'S SURFING 1.5 MM NEOPRENE SHORTY WETSUIT 500 BLUE BLACK
OLAIAN BOY'S SURFING 1.5 MM NEOPRENE SHORTY WETSUIT 500 BLUE BLACK
Rate: 4.5 stars, 12 votes
£34.99
OLAIAN Boys' Long-sleeved NEO Sun Top block neon orange
OLAIAN Boy's NEO sun top long sleeve black khaki
Gallery item 1 out of 2
OLAIAN Boys' Long-sleeved NEO Sun Top block neon orange
Rate: 4.7 stars, 40 votes
2 colors
£11.99£17.99
OLAIAN GIRL'S SURFING SWIMSUIT TRIANGLE TOP LIZY 500 BLACK
OLAIAN GIRL'S SURFING TRIANGLE SWIMSUIT TOP LIZY 500 VIOLET
OLAIAN Girl's triangular swimsuit top - 500 Lizy leopard blue
Gallery item 1 out of 3
OLAIAN GIRL'S SURFING SWIMSUIT TRIANGLE TOP LIZY 500 BLACK
Rate: 4.5 stars, 41 votes
3 colors
£8.99£12.99
OLAIAN Kid's Surfing Anti-UV Long-sleeved Water T-shirt
OLAIAN kid's surfing UV protection long-sleeved water t-shirt blue
Gallery item 1 out of 2
OLAIAN Kid's Surfing Anti-UV Long-sleeved Water T-shirt
Rate: 4.7 stars, 156 votes
2 colors
£7.99
OLAIAN Kid's water tee shirt anti UV pink
OLAIAN Kids' Surfing UV Protection Water T-Shirt - Sky Blue
OLAIAN kids’ anti-UV printed surfing water T-shirt - turquoise
OLAIAN kids’ surfing anti-UV printed water T-Shirt - green
Gallery item 1 out of 4
OLAIAN Kid's water tee shirt anti UV pink
Rate: 4.8 stars, 861 votes
4 colors
£5.99
OLAIAN Boy's swim shorts - 100 sky blue
OLAIAN Boy's swim shorts -100 navy blue
Gallery item 1 out of 2
OLAIAN Boy's swim shorts - 100 sky blue
2 colors
£5.99
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 500 FUCHSIA
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 500 PURPLE
Gallery item 1 out of 2
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 500 FUCHSIA
Rate: 4.7 stars, 39 votes
2 colors
£9.99£15.99
OLAIAN SWIM SHORTS BOARDSHORT 900 - GREEN
OLAIAN BOARDSHORT SWIMMING SHORTS 900 BLACK
OLAIAN SWIM SHORTS BOARDSHORT 900 BLUE
Gallery item 1 out of 3
OLAIAN SWIM SHORTS BOARDSHORT 900 - GREEN
Rate: 4.3 stars, 65 votes
3 colors
£14.99£22.99
OLAIAN Two-piece swimsuit BONI 100 - TURQUOISE
OLAIAN Two-piece swimsuit BONI 100 - PINK
OLAIAN Two-piece swimsuit JUNE BONI 100
Gallery item 1 out of 3
OLAIAN Two-piece swimsuit BONI 100 - TURQUOISE
Rate: 4.5 stars, 419 votes
3 colors
£10.99
Was £12.99
OLAIAN GIRL'S Swimsuit bottom JUNE CORAL
OLAIAN LITTLE GIRL'S Swimsuit bottoms MADI 100 - PINK
OLAIAN LITTLE GIRL'S Swimsuit bottoms MADI 100 - PINK
Gallery item 1 out of 3
OLAIAN GIRL'S Swimsuit bottom JUNE CORAL
Rate: 4.3 stars, 268 votes
3 colors
£10.99
Was £12.99
OLAIAN GIRL’S REVERSIBLE SWIMSUIT BOTTOMS 500 BLACK
OLAIAN GIRL’S REVERSIBLE SWIMSUIT BOTTOMS 500 PURPLE
OLAIAN Girl's reversible swimsuit bottoms - 500 Bella Leopard blue
Gallery item 1 out of 3
OLAIAN GIRL’S REVERSIBLE SWIMSUIT BOTTOMS 500 BLACK
Rate: 4.3 stars, 39 votes
3 colors
£5.99£12.99
OLAIAN Boy's surfing anti-UV short-sleeved T-shirt - 500 - blue
OLAIAN Boy's short-sleeved anti-UV T-shirt - 500 Camo black blue
Gallery item 1 out of 2
OLAIAN Boy's surfing anti-UV short-sleeved T-shirt - 500 - blue
2 colors
£12.99
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 100 BLACK
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 100 CORAL
OLAIAN GIRL'S MIXLIFE ONE-PIECE SWIMSUIT 100 YELLOW
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 100 DAISIES AZURE BLUE
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 100 COCO TURQUOISE
OLAIAN One-piece swimsuit 100 - turquoise
OLAIAN Girl's 1-piece swimsuit - 100 Hiloe tropical party pink
Gallery item 1 out of 7
OLAIAN GIRL'S ONE-PIECE SWIMSUIT 100 BLACK
Rate: 4.4 stars, 981 votes
7 colors
£6.49£9.99
OLAIAN BOY'S SWIMMING SHORTS PALMITOS BLUE
OLAIAN boy's swimming shorts - black
Gallery item 1 out of 2
OLAIAN BOY'S SWIMMING SHORTS PALMITOS BLUE
Rate: 4.7 stars, 62 votes
2 colors
£7.99£10.99
OLAIAN Junior Neoprene Top Surf 900 1.5 mm - black
OLAIAN Junior Neoprene Top Surf 900 1.5 mm - black
Rate: 4.4 stars, 5 votes
£27.99£39.99
OLAIAN GIRL'S SWIMSUIT TOP SURF TRIANGLE BETTY 500 TURQUOISE PINK
OLAIAN BETTY 500 SURF GIRL'S SWIMSUIT TOP AND TRIANGLE TURQUOISE
OLAIAN GIRL'S SURF SWIMSUIT TRIANGLE TOP BETTY 500 BLUE
Gallery item 1 out of 3
OLAIAN GIRL'S SWIMSUIT TOP SURF TRIANGLE BETTY 500 TURQUOISE PINK
Rate: 4.6 stars, 405 votes
3 colors
£4.99£9.99
OLAIAN swim shorts 500 black pink
OLAIAN swim shorts 500 - beige
OLAIAN SWIMMING WAVYWAVE SHORTS 500 BLUE
OLAIAN SWIM SHORTS 500 BLACK GREEN
OLAIAN swim shorts 500 multicoloured
OLAIAN SWIM SHORTS 500 KHAKI
OLAIAN SWIMMING SHORTS 500 - BLUE/BLACK
OLAIAN SWIMMING SHORTS 500 - BLUE/CAMO
OLAIAN Boy's swim shorts - 500 brush lines blue
OLAIAN Boy's swim shorts - 500 zebra red purple
OLAIAN Boy's swim shorts - 500 Memphis green
OLAIAN Boys' swim shorts - 500 Palmsand black
OLAIAN SWIM SHORTS 500 ORANGE
OLAIAN SWIM SHORTS 500 BLUE RED
OLAIAN SWIM SHORTS 500 DARK BLUE
Gallery item 1 out of 15
OLAIAN swim shorts 500 black pink
Rate: 4.5 stars, 380 votes
15 colors
£7.99£15.99
OLAIAN GIRL'S ONE-PIECE TRIANGLE SWIMSUIT 500 ORANGE
OLAIAN GIRL'S ONE-PIECE TRIANGLE SWIMSUIT 500 FUCHSIA
Gallery item 1 out of 2
OLAIAN GIRL'S ONE-PIECE TRIANGLE SWIMSUIT 500 ORANGE
Rate: 4.7 stars, 94 votes
2 colors
£9.99£15.99
OLAIAN Boy's anti-UV long-sleeved T-shirt - 900 black
OLAIAN Boy's anti-UV long-sleeved T-shirt - 900 black
£19.99
OLAIAN GIRL'S SURFING TRIANGLE LILY SWIMSUIT TOP 900 BLUR PINK
OLAIAN GIRL'S SURFING LILY SWIMSUIT TRIANGLE TOP 900 BLACK
OLAIAN Girl's swimsuit top - 900 Lily purple turquoise
Gallery item 1 out of 3
OLAIAN GIRL'S SURFING TRIANGLE LILY SWIMSUIT TOP 900 BLUR PINK
Rate: 4.8 stars, 19 votes
3 colors
£9.99£14.99
OLAIAN 2-piece swimsuit TAMARA 100 - coral
OLAIAN 2-piece swimsuit TAMARA 100 black
Gallery item 1 out of 2
OLAIAN 2-piece swimsuit TAMARA 100 - coral
Rate: 4.6 stars, 405 votes
2 colors
£4.99£6.99
OLAIAN Kids' Steamer Full Wetsuit 100 4/3
OLAIAN Kids' Steamer Full Wetsuit 100 4/3
Rate: 3.3 stars, 3 votes
£54.99
OLAIAN Swim Shorts - sky blue
OLAIAN Swim Shorts - navy blue
OLAIAN Swim Shorts - Turquoise blue
Gallery item 1 out of 3
OLAIAN Swim Shorts - sky blue
Rate: 4.7 stars, 1222 votes
3 colors
£3.19£4.99
4.5/5 based on 20064 reviews collected online and in stores

Splish, splash!

Whether you're planning a summer holiday, booking swimming lessons for your toddler or just planning some fun family splash time at the local pool, our kids' swimwear range has everything you need. From pretty swimming costumes to practical swim shorts, we stock a wide range of swimwear for boys, girls and babies of all ages.

Each item in our range is designed to fit your child perfectly, offer excellent value for money and ensure they can bob about and practice strokes in total comfort. Shop now at Decathlon.