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Whether it's for summertime or swimming lessons, your girls need the right gear for when they dive into the water. Check out thredUP's selection of girls' swimwear to discover items from top brands at up to 90% off estimated retail.

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44 items
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    Zara Board Shorts (view 2)Zara Board Shorts (view 1)
    View Product: Zara Board Shorts

    Zara

    Board Shorts
    Size 11
    $8.99
    59% off estimated retail
    Crewcuts One Piece Swimsuit (view 2)Crewcuts One Piece Swimsuit (view 1)
    View Product: Crewcuts One Piece Swimsuit

    Crewcuts

    One Piece Swimsuit
    Size 10
    $16.99
    65% off estimated retail
    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 4T
    $10.99
    35% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 3-6 mo
    $9.99
    44% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Janie and Jack Two Piece Swimsuit (view 2)Janie and Jack Two Piece Swimsuit (view 1)
    View Product: Janie and Jack Two Piece Swimsuit

    Janie and Jack

    Two Piece Swimsuit
    Size 6-12 mo
    $19.99
    52% off estimated retail
    Lands' End Swimsuit Cover Up (view 2)Lands' End Swimsuit Cover Up (view 1)
    View Product: Lands' End Swimsuit Cover Up

    Lands' End

    Swimsuit Cover Up
    Size 10
    $21.99
    42% off estimated retail
    Sunuva Rash Guard (view 2)Sunuva Rash Guard (view 1)
    View Product: Sunuva Rash Guard

    Sunuva

    Rash Guard
    Size 5
    $20.99
    61% off estimated retail
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 4
    $16.99
    50% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 6-12 mo
    $16.99 $13.59 20% off with code PLANET
    59% off estimated retail
    Baby Gap One Piece Swimsuit (view 2)Baby Gap One Piece Swimsuit (view 1)
    View Product: Baby Gap One Piece Swimsuit

    Baby Gap

    One Piece Swimsuit
    Size 2
    $7.99
    70% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 12-18 mo
    $20.99 $15.74 25% off with code PLANET
    52% off estimated retail
    TYR Rash Guard (view 2)TYR Rash Guard (view 1)
    View Product: TYR Rash Guard

    TYR

    Rash Guard
    Size Medium kids
    $10.99 $8.24 25% off with code PLANET
    59% off estimated retail
    Child of Mine by Carter's Wetsuit (view 2)Child of Mine by Carter's Wetsuit (view 1)
    View Product: Child of Mine by Carter's Wetsuit

    Child of Mine by Carter's

    Wetsuit
    Size 3-6 mo
    $8.99
    59% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size Large youth
    $15.99
    51% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 18 mo
    $13.99
    61% off estimated retail
    No Boundaries Swimsuit Cover Up (view 2)No Boundaries Swimsuit Cover Up (view 1)
    View Product: No Boundaries Swimsuit Cover Up

    No Boundaries

    Swimsuit Cover Up
    Size 7
    $8.99 $6.74 25% off with code PLANET
    40% off estimated retail
    Athleta Rash Guard (view 2)Athleta Rash Guard (view 1)
    View Product: Athleta Rash Guard

    Athleta

    Rash Guard
    Size 12
    $19.99 $13.99 30% off with code PLANET
    63% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 12
    $13.99 $11.19 20% off with code PLANET
    66% off estimated retail
    Hobie One Piece Swimsuit (view 2)Hobie One Piece Swimsuit (view 1)
    View Product: Hobie One Piece Swimsuit

    Hobie

    One Piece Swimsuit
    Size 8
    $13.99 $10.49 25% off with code PLANET
    77% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 2T
    $17.99 $13.49 25% off with code PLANET
    59% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 18 mo
    $14.99 $11.24 25% off with code PLANET
    61% off estimated retail
    REI Rash Guard (view 2)REI Rash Guard (view 1)
    View Product: REI Rash Guard

    REI

    Rash Guard
    Size 10
    $14.99 $11.24 25% off with code PLANET
    65% off estimated retail
    In Extenso Board Shorts (view 2)In Extenso Board Shorts (view 1)
    View Product: In Extenso Board Shorts

    In Extenso

    Board Shorts
    Size 3
    $8.99 $7.19 20% off with code PLANET
    11% off estimated retail
    Floatimini Two Piece Swimsuit (view 2)Floatimini Two Piece Swimsuit (view 1)
    View Product: Floatimini Two Piece Swimsuit

    Floatimini

    Two Piece Swimsuit
    Size 6
    $13.99 $10.49 25% off with code PLANET
    82% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size 160 cm
    $12.99 $9.74 25% off with code PLANET
    63% off estimated retail
    Gap Kids Rash Guard (view 2)Gap Kids Rash Guard (view 1)
    View Product: Gap Kids Rash Guard

    Gap Kids

    Rash Guard
    Size Small kids
    $19.99 $12.99 35% off with code PLANET
    43% off estimated retail
    Gap Kids Rash Guard (view 2)Gap Kids Rash Guard (view 1)
    View Product: Gap Kids Rash Guard

    Gap Kids

    Rash Guard
    Size 2X-large kids
    $20.99 $13.64 35% off with code PLANET
    40% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 18 mo
    $13.99 $10.49 25% off with code PLANET
    23% off estimated retail
    Roxy Rash Guard (view 2)Roxy Rash Guard (view 1)Price Drop
    View Product: Roxy Rash Guard

    Roxy

    Rash Guard
    Size 14
    $22.99 $16.09 30% off with code PLANET
    48% off estimated retail
    ZeroXposur Swimsuit Cover Up (view 2)ZeroXposur Swimsuit Cover Up (view 1)Price Drop
    View Product: ZeroXposur Swimsuit Cover Up

    ZeroXposur

    Swimsuit Cover Up
    Size 10
    $15.99 $11.99 25% off with code PLANET
    65% off estimated retail
    Genuine Girl Board Shorts (view 2)Genuine Girl Board Shorts (view 1)
    View Product: Genuine Girl Board Shorts

    Genuine Girl

    Board Shorts
    Size Medium infants
    $6.99 $5.59 20% off with code PLANET
    14% off estimated retail
    Crewcuts Rash Guard (view 2)Crewcuts Rash Guard (view 1)Price Drop
    View Product: Crewcuts Rash Guard

    Crewcuts

    Rash Guard
    Size 6
    $21.99 $14.29 35% off with code PLANET
    61% off estimated retail
    Soft Gallery Rash Guard (view 2)Soft Gallery Rash Guard (view 1)Price Drop
    View Product: Soft Gallery Rash Guard

    Soft Gallery

    Rash Guard
    Size 10
    $22.99 $16.09 30% off with code PLANET
    89% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 2T
    $12.99 $9.74 25% off with code PLANET
    29% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)Price Drop
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 9 mo
    $8.99 $7.19 20% off with code PLANET
    69% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)Price Drop
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size Newborn
    $13.24 $9.93 25% off with code PLANET
    54% off estimated retail
    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 12 mo
    $10.99 $8.24 25% off with code PLANET
    41% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 3-6 mo
    $11.99 $8.99 25% off with code PLANET
    41% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)Price Drop
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size Medium youth
    $12.24 $9.18 25% off with code PLANET
    69% off estimated retail
    Baby Gap Rash Guard (view 2)Baby Gap Rash Guard (view 1)Price Drop
    View Product: Baby Gap Rash Guard

    Baby Gap

    Rash Guard
    Size 6-12 mo
    $9.99 $7.49 25% off with code PLANET
    57% off estimated retail
    Sun N Sand Swimsuit Cover Up (view 2)Sun N Sand Swimsuit Cover Up (view 1)Price Drop
    View Product: Sun N Sand Swimsuit Cover Up

    Sun N Sand

    Swimsuit Cover Up
    Size X-Large youth
    $10.24 $8.19 20% off with code PLANET
    37% off estimated retail
    Old Navy Two Piece Swimsuit (view 2)Old Navy Two Piece Swimsuit (view 1)New With Tags
    View Product: Old Navy Two Piece Swimsuit

    Old Navy

    Two Piece Swimsuit
    Size 12-18 mo
    $9.99 $7.49 25% off with code PLANET
    28% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)Price Drop
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 4
    $12.24 $9.18 25% off with code PLANET
    55% off estimated retail
    Koala Kids One Piece Swimsuit (view 2)Koala Kids One Piece Swimsuit (view 1)Price Drop
    View Product: Koala Kids One Piece Swimsuit

    Koala Kids

    One Piece Swimsuit
    Size 6 mo
    $8.99 $7.19 20% off with code PLANET
    20% off estimated retail
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