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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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33 items
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    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 4
    $14.99
    25% off estimated retail
    Athleta Board Shorts (view 2)Athleta Board Shorts (view 1)
    View Product: Athleta Board Shorts

    Athleta

    Board Shorts
    Size 12
    $21.99
    42% off estimated retail
    Splendid One Piece Swimsuit (view 2)Splendid One Piece Swimsuit (view 1)
    View Product: Splendid One Piece Swimsuit

    Splendid

    One Piece Swimsuit
    Size 12
    $16.99
    65% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 8
    $21.99
    37% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 7
    $13.99
    44% off estimated retail
    O'Neill Two Piece Swimsuit (view 2)O'Neill Two Piece Swimsuit (view 1)New With Tags
    View Product: O'Neill Two Piece Swimsuit

    O'Neill

    Two Piece Swimsuit
    Size 2T
    $23.99
    47% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 150 cm
    $13.99
    57% off estimated retail
    Tommy Bahama Rash Guard (view 2)Tommy Bahama Rash Guard (view 1)
    View Product: Tommy Bahama Rash Guard

    Tommy Bahama

    Rash Guard
    Size 5
    $13.99
    64% off estimated retail
    Shade Critters One Piece Swimsuit (view 2)Shade Critters One Piece Swimsuit (view 1)
    View Product: Shade Critters One Piece Swimsuit

    Shade Critters

    One Piece Swimsuit
    Size 5T
    $26.99
    60% off estimated retail
    Sporti One Piece Swimsuit (view 2)Sporti One Piece Swimsuit (view 1)
    View Product: Sporti One Piece Swimsuit

    Sporti

    One Piece Swimsuit
    Size X-Small youth
    $12.99 $10.39 20% off with code HOTDEAL
    25% off estimated retail
    Stella McCartney One Piece Swimsuit (view 2)Stella McCartney One Piece Swimsuit (view 1)
    View Product: Stella McCartney One Piece Swimsuit

    Stella McCartney

    One Piece Swimsuit
    Size 24 mo
    $32.99 $18.14 45% off with code HOTDEAL
    67% off estimated retail
    Shein Two Piece Swimsuit (view 2)Shein Two Piece Swimsuit (view 1)
    View Product: Shein Two Piece Swimsuit

    Shein

    Two Piece Swimsuit
    Size 130 cm
    $8.99 $7.19 20% off with code HOTDEAL
    50% off estimated retail
    Junk Food One Piece Swimsuit (view 2)Junk Food One Piece Swimsuit (view 1)
    View Product: Junk Food One Piece Swimsuit

    Junk Food

    One Piece Swimsuit
    Size 2T
    $10.99 $8.79 20% off with code HOTDEAL
    63% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)New With Tags
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 20
    $37.99 $22.79 40% off with code HOTDEAL
    49% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size Small kids
    $17.99 $13.49 25% off with code HOTDEAL
    37% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 18
    $26.99 $18.89 30% off with code HOTDEAL
    56% off estimated retail
    Funsies Wetsuit (view 2)Funsies Wetsuit (view 1)
    View Product: Funsies Wetsuit

    Funsies

    Wetsuit
    Size 3-6 mo
    $12.99 $10.39 20% off with code HOTDEAL
    45% off estimated retail
    Kids Ink One Piece Swimsuit (view 2)Kids Ink One Piece Swimsuit (view 1)
    View Product: Kids Ink One Piece Swimsuit

    Kids Ink

    One Piece Swimsuit
    Size 3T
    $20.99 $15.74 25% off with code HOTDEAL
    44% off estimated retail
    Active by Old Navy One Piece Swimsuit (view 2)Active by Old Navy One Piece Swimsuit (view 1)
    View Product: Active by Old Navy One Piece Swimsuit

    Active by Old Navy

    One Piece Swimsuit
    Size 6
    $12.99 $10.39 20% off with code HOTDEAL
    40% off estimated retail
    Zella Rash Guard (view 2)Zella Rash Guard (view 1)
    View Product: Zella Rash Guard

    Zella

    Rash Guard
    Size 10
    $11.99 $9.59 20% off with code HOTDEAL
    56% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 10
    $28.99 $18.84 35% off with code HOTDEAL
    31% 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 18 mo
    $12.99 $10.39 20% off with code HOTDEAL
    45% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 6
    $23.99 $15.59 35% off with code HOTDEAL
    42% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)Price Drop
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 12-18 mo
    $12.99 $9.09 30% off with code HOTDEAL
    64% off estimated retail
    Shade Critters Swimsuit Cover Up (view 2)Shade Critters Swimsuit Cover Up (view 1)
    View Product: Shade Critters Swimsuit Cover Up

    Shade Critters

    Swimsuit Cover Up
    Size 3T
    $23.99 $10.80 55% off with code HOTDEAL
    63% off estimated retail
    Pelle One Piece Swimsuit (view 2)Pelle One Piece Swimsuit (view 1)Price Drop
    View Product: Pelle One Piece Swimsuit

    Pelle

    One Piece Swimsuit
    Size Small infants
    $16.99 $11.89 30% off with code HOTDEAL
    44% off estimated retail
    Justice Rash Guard (view 2)Justice Rash Guard (view 1)Price Drop
    View Product: Justice Rash Guard

    Justice

    Rash Guard
    Size X-Large kids
    $20.99 $13.64 35% off with code HOTDEAL
    48% off estimated retail
    Art Class One Piece Swimsuit (view 2)Art Class One Piece Swimsuit (view 1)Price Drop
    View Product: Art Class One Piece Swimsuit

    Art Class

    One Piece Swimsuit
    Size 4
    $12.99 $8.44 35% off with code HOTDEAL
    35% 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
    $12.99 $8.44 35% off with code HOTDEAL
    45% off estimated retail
    Pehr One Piece Swimsuit (view 2)Pehr One Piece Swimsuit (view 1)New With Tags
    View Product: Pehr One Piece Swimsuit

    Pehr

    One Piece Swimsuit
    Size 12 mo
    $11.99 $7.79 35% off with code HOTDEAL
    59% off estimated retail
    Boohoo Board Shorts (view 2)Boohoo Board Shorts (view 1)Price Drop
    View Product: Boohoo Board Shorts

    Boohoo

    Board Shorts
    Size 6
    $13.99 $9.09 35% off with code HOTDEAL
    72% 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 12 mo
    $11.99 $7.79 35% off with code HOTDEAL
    41% 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 2T
    $10.99 $7.14 35% off with code HOTDEAL
    65% off estimated retail
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