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Whether it's a day at the pool or the beach, your little man needs a comfortable and stylish look. At thredUP, you'll find boys' swimwear in a variety of styles, colors, and designs that he will love, and at up to 90% off estimated retail, the prices will make you happy as well.

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38 items
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    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 4T
    $8.99
    43% off estimated retail
    Crewcuts Board Shorts (view 2)Crewcuts Board Shorts (view 1)
    View Product: Crewcuts Board Shorts

    Crewcuts

    Board Shorts
    Size 14
    $17.99
    63% off estimated retail
    Cat & Jack Board Shorts (view 2)Cat & Jack Board Shorts (view 1)
    View Product: Cat & Jack Board Shorts

    Cat & Jack

    Board Shorts
    Size 12
    $11.99
    23% off estimated retail
    Hanna Andersson Rash Guard (view 2)Hanna Andersson Rash Guard (view 1)
    View Product: Hanna Andersson Rash Guard

    Hanna Andersson

    Rash Guard
    Size 140 cm
    $19.99
    51% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Crewcuts Rash Guard (view 2)Crewcuts Rash Guard (view 1)Flawed Gem
    View Product: Crewcuts Rash Guard

    Crewcuts

    Rash Guard
    Size 12
    $16.99
    65% off estimated retail
    Billabong Rash Guard (view 2)Billabong Rash Guard (view 1)
    View Product: Billabong Rash Guard

    Billabong

    Rash Guard
    Size 10
    $15.99
    61% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 8
    $15.99
    61% off estimated retail
    Hanna Andersson Board Shorts (view 2)Hanna Andersson Board Shorts (view 1)
    View Product: Hanna Andersson Board Shorts

    Hanna Andersson

    Board Shorts
    Size 6
    $20.99
    43% off estimated retail
    Crewcuts Outlet Board Shorts (view 2)Crewcuts Outlet Board Shorts (view 1)
    View Product: Crewcuts Outlet Board Shorts

    Crewcuts Outlet

    Board Shorts
    Size 10
    $7.99
    50% 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 Medium kids
    $16.99
    48% off estimated retail
    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)New With Tags
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 8
    $11.99
    55% off estimated retail
    Maaji Board Shorts (view 2)Maaji Board Shorts (view 1)
    View Product: Maaji Board Shorts

    Maaji

    Board Shorts
    Size 2
    $22.99
    52% off estimated retail
    Hurley Board Shorts (view 2)Hurley Board Shorts (view 1)
    View Product: Hurley Board Shorts

    Hurley

    Board Shorts
    Size 6
    $12.99
    63% off estimated retail
    Crown & Ivy Board Shorts (view 2)Crown & Ivy Board Shorts (view 1)New With Tags
    View Product: Crown & Ivy Board Shorts

    Crown & Ivy

    Board Shorts
    Size X-Large youth
    $15.99
    62% off estimated retail
    Tea Board Shorts (view 2)Tea Board Shorts (view 1)
    View Product: Tea Board Shorts

    Tea

    Board Shorts
    Size 9-12 mo
    $17.99
    59% off estimated retail
    Stella McCartney Board Shorts (view 2)Stella McCartney Board Shorts (view 1)
    View Product: Stella McCartney Board Shorts

    Stella McCartney

    Board Shorts
    Size 12 mo
    $34.99 $19.24 45% off with code HOTDEAL
    46% off estimated retail
    REI Rash Guard (view 2)REI Rash Guard (view 1)
    View Product: REI Rash Guard

    REI

    Rash Guard
    Size X-Small kids
    $10.99 $8.79 20% off with code HOTDEAL
    67% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 7
    $16.99 $13.59 20% off with code HOTDEAL
    65% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 3-6 mo
    $17.99 $13.49 25% off with code HOTDEAL
    34% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 6-12 mo
    $17.99 $12.59 30% off with code HOTDEAL
    51% off estimated retail
    Sol Swim Board Shorts (view 2)Sol Swim Board Shorts (view 1)
    View Product: Sol Swim Board Shorts

    Sol Swim

    Board Shorts
    Size 6-9 mo
    $12.99 $10.39 20% off with code HOTDEAL
    20% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 18 mo
    $21.99 $16.49 25% off with code HOTDEAL
    40% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 9 mo
    $11.99 $9.59 20% off with code HOTDEAL
    61% off estimated retail
    OshKosh B'gosh Board Shorts (view 2)OshKosh B'gosh Board Shorts (view 1)
    View Product: OshKosh B'gosh Board Shorts

    OshKosh B'gosh

    Board Shorts
    Size 6-9 mo
    $13.99 $11.19 20% off with code HOTDEAL
    36% off estimated retail
    Floatimini Rash Guard (view 2)Floatimini Rash Guard (view 1)
    View Product: Floatimini Rash Guard

    Floatimini

    Rash Guard
    Size 18 mo
    $25.99 $16.89 35% off with code HOTDEAL
    61% off estimated retail
    Old Navy Rash Guard (view 2)Old Navy Rash Guard (view 1)
    View Product: Old Navy Rash Guard

    Old Navy

    Rash Guard
    Size 0-3 mo
    $8.99 $7.19 20% off with code HOTDEAL
    42% off estimated retail
    Baby Gap Board Shorts (view 2)Baby Gap Board Shorts (view 1)
    View Product: Baby Gap Board Shorts

    Baby Gap

    Board Shorts
    Size Newborn
    $15.99 $11.19 30% off with code HOTDEAL
    38% off estimated retail
    Carter's Board Shorts (view 2)Carter's Board Shorts (view 1)Price Drop
    View Product: Carter's Board Shorts

    Carter's

    Board Shorts
    Size 3 mo
    $13.99 $9.79 30% off with code HOTDEAL
    53% off estimated retail
    Tea Board Shorts (view 2)Tea Board Shorts (view 1)
    View Product: Tea Board Shorts

    Tea

    Board Shorts
    Size 12-18 mo
    $17.99 $10.79 40% off with code HOTDEAL
    59% off estimated retail
    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)Price Drop
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 12-18 mo
    $8.99 $5.84 35% off with code HOTDEAL
    50% off estimated retail
    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)Price Drop
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 12-18 mo
    $10.99 $7.14 35% off with code HOTDEAL
    43% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)Price Drop
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 3-6 mo
    $11.99 $7.79 35% off with code HOTDEAL
    56% off estimated retail
    Old Navy Rash Guard (view 2)Old Navy Rash Guard (view 1)Price Drop
    View Product: Old Navy Rash Guard

    Old Navy

    Rash Guard
    Size 12-18 mo
    $7.99 $5.19 35% off with code HOTDEAL
    50% 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 18 mo
    $11.99 $7.19 40% off with code HOTDEAL
    58% 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 3 mo
    $11.99 $7.19 40% off with code HOTDEAL
    61% off estimated retail
    Baby Gap Board Shorts (view 2)Baby Gap Board Shorts (view 1)Price Drop
    View Product: Baby Gap Board Shorts

    Baby Gap

    Board Shorts
    Size 12-18 mo
    $11.99 $7.79 35% off with code HOTDEAL
    52% off estimated retail
    Old Navy Rash Guard (view 2)Old Navy Rash Guard (view 1)Price Drop
    View Product: Old Navy Rash Guard

    Old Navy

    Rash Guard
    Size 3-6 mo
    $11.99 $7.79 35% off with code HOTDEAL
    28% 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 12-18 mo
    $10.24 $6.66 35% off with code HOTDEAL
    60% off estimated retail
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