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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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    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size 8
    $13.99 $7.69 45% off with code GOBIG
    45% 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
    $21.99 $12.09 45% off with code GOBIG
    40% 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 $11.54 45% off with code GOBIG
    43% 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
    $22.99 $12.64 45% off with code GOBIG
    36% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    H&M Board Shorts (view 2)H&M Board Shorts (view 1)
    View Product: H&M Board Shorts

    H&M

    Board Shorts
    Size X-Small youth
    $12.99 $7.14 45% off with code GOBIG
    25% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 5T
    $15.99 $8.79 45% off with code GOBIG
    13% off estimated retail
    Baby Gap Rash Guard (view 2)Baby Gap Rash Guard (view 1)
    View Product: Baby Gap Rash Guard

    Baby Gap

    Rash Guard
    Size 3T
    $15.99 $8.79 45% off with code GOBIG
    38% off estimated retail
    Art Class Rash Guard (view 2)Art Class Rash Guard (view 1)
    View Product: Art Class Rash Guard

    Art Class

    Rash Guard
    Size 8
    $13.99 $7.69 45% off with code GOBIG
    40% off estimated retail
    Carter's Board Shorts (view 2)Carter's Board Shorts (view 1)
    View Product: Carter's Board Shorts

    Carter's

    Board Shorts
    Size 18 mo
    $21.99 $12.09 45% off with code GOBIG
    40% off estimated retail
    Hanna Andersson Wetsuit (view 2)Hanna Andersson Wetsuit (view 1)
    View Product: Hanna Andersson Wetsuit

    Hanna Andersson

    Wetsuit
    Size 80 cm
    $21.99 $12.09 45% off with code GOBIG
    59% off estimated retail
    Vilebrequin Board Shorts (view 2)Vilebrequin Board Shorts (view 1)
    View Product: Vilebrequin Board Shorts

    Vilebrequin

    Board Shorts
    Size 2
    $56.99 $31.34 45% off with code GOBIG
    70% off estimated retail
    Janie and Jack Board Shorts (view 2)Janie and Jack Board Shorts (view 1)
    View Product: Janie and Jack Board Shorts

    Janie and Jack

    Board Shorts
    Size 4
    $13.99 $7.69 45% off with code GOBIG
    61% off estimated retail
    Lolly Dots Rash Guard (view 2)Lolly Dots Rash Guard (view 1)
    View Product: Lolly Dots Rash Guard

    Lolly Dots

    Rash Guard
    Size 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    50% off estimated retail
    Art Class Rash Guard (view 2)Art Class Rash Guard (view 1)
    View Product: Art Class Rash Guard

    Art Class

    Rash Guard
    Size 8
    $11.99 $6.59 45% off with code GOBIG
    40% off estimated retail
    Lacrosse Unlimited Board Shorts (view 2)Lacrosse Unlimited Board Shorts (view 1)
    View Product: Lacrosse Unlimited Board Shorts

    Lacrosse Unlimited

    Board Shorts
    Size Medium youth
    $15.99 $8.79 45% off with code GOBIG
    48% off estimated retail
    Janie and Jack Board Shorts (view 2)Janie and Jack Board Shorts (view 1)
    View Product: Janie and Jack Board Shorts

    Janie and Jack

    Board Shorts
    Size 4
    $12.99 $7.14 45% off with code GOBIG
    52% off estimated retail
    Janie and Jack Board Shorts (view 2)Janie and Jack Board Shorts (view 1)
    View Product: Janie and Jack Board Shorts

    Janie and Jack

    Board Shorts
    Size 3
    $17.99 $9.89 45% off with code GOBIG
    51% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 5T
    $15.99 $8.79 45% off with code GOBIG
    13% off estimated retail
    Highland Outfitters Board Shorts (view 2)Highland Outfitters Board Shorts (view 1)
    View Product: Highland Outfitters Board Shorts

    Highland Outfitters

    Board Shorts
    Size 14
    $10.99 $6.04 45% off with code GOBIG
    37% off estimated retail
    Nike Board Shorts (view 2)Nike Board Shorts (view 1)
    View Product: Nike Board Shorts

    Nike

    Board Shorts
    Size 11
    $30.99 $17.04 45% off with code GOBIG
    35% off estimated retail
    InGear Board Shorts (view 2)InGear Board Shorts (view 1)
    View Product: InGear Board Shorts

    InGear

    Board Shorts
    Size 4T
    $10.99 $6.04 45% off with code GOBIG
    50% off estimated retail
    Quiksilver Rash Guard (view 2)Quiksilver Rash Guard (view 1)
    View Product: Quiksilver Rash Guard

    Quiksilver

    Rash Guard
    Size Small youth
    $16.99 $9.34 45% off with code GOBIG
    57% off estimated retail
    O'Neill Wetsuit (view 2)O'Neill Wetsuit (view 1)
    View Product: O'Neill Wetsuit

    O'Neill

    Wetsuit
    Size 16
    $42.99 $23.64 45% off with code GOBIG
    46% 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 Newborn
    $17.99 $9.89 45% off with code GOBIG
    42% off estimated retail
    Marvel Board Shorts (view 2)Marvel Board Shorts (view 1)
    View Product: Marvel Board Shorts

    Marvel

    Board Shorts
    Size 3T
    $13.99 $7.69 45% off with code GOBIG
    33% off estimated retail
    Marvel Rash Guard (view 2)Marvel Rash Guard (view 1)New With Tags
    View Product: Marvel Rash Guard

    Marvel

    Rash Guard
    Size 3T
    $16.99 $9.34 45% off with code GOBIG
    48% off estimated retail
    EZPZ Easy Peasy Board Shorts (view 2)EZPZ Easy Peasy Board Shorts (view 1)
    View Product: EZPZ Easy Peasy Board Shorts

    EZPZ Easy Peasy

    Board Shorts
    Size 18 mo
    $18.99 $10.44 45% off with code GOBIG
    55% off estimated retail
    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size Small youth
    $12.99 $7.14 45% off with code GOBIG
    50% off estimated retail
    Minecraft Board Shorts (view 2)Minecraft Board Shorts (view 1)
    View Product: Minecraft Board Shorts

    Minecraft

    Board Shorts
    Size 14
    $7.99 $4.39 45% off with code GOBIG
    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 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    52% off estimated retail
    Floatimini Board Shorts (view 2)Floatimini Board Shorts (view 1)
    View Product: Floatimini Board Shorts

    Floatimini

    Board Shorts
    Size 18 mo
    $21.99 $12.09 45% off with code GOBIG
    50% off estimated retail
    Baby Gap Wetsuit (view 2)Baby Gap Wetsuit (view 1)
    View Product: Baby Gap Wetsuit

    Baby Gap

    Wetsuit
    Size 18-24 mo
    $16.99 $9.34 45% off with code GOBIG
    48% off estimated retail
    Gap Board Shorts (view 2)Gap Board Shorts (view 1)
    View Product: Gap Board Shorts

    Gap

    Board Shorts
    Size 8
    $17.99 $9.89 45% off with code GOBIG
    55% off estimated retail
    Gap Kids Board Shorts (view 2)Gap Kids Board Shorts (view 1)
    View Product: Gap Kids Board Shorts

    Gap Kids

    Board Shorts
    Size Small kids
    $12.99 $7.14 45% off with code GOBIG
    47% off estimated retail
    Hurley Rash Guard (view 2)Hurley Rash Guard (view 1)
    View Product: Hurley Rash Guard

    Hurley

    Rash Guard
    Size 2T
    $15.99 $8.79 45% off with code GOBIG
    60% off estimated retail
    Gap X Star Wars Board Shorts (view 2)Gap X Star Wars Board Shorts (view 1)
    View Product: Gap X Star Wars Board Shorts

    Gap X Star Wars

    Board Shorts
    Size 2T
    $16.99 $9.34 45% off with code GOBIG
    22% 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 3T
    $18.99 $10.44 45% off with code GOBIG
    52% 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 6-9 mo
    $16.99 $9.34 45% off with code GOBIG
    36% off estimated retail
    Puma Board Shorts (view 2)Puma Board Shorts (view 1)
    View Product: Puma Board Shorts

    Puma

    Board Shorts
    Size 24 mo
    $11.99 $6.59 45% off with code GOBIG
    33% 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 6-12 mo
    $10.99 $6.04 45% off with code GOBIG
    57% 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 130 cm
    $27.99 $15.39 45% off with code GOBIG
    43% 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 3T
    $16.99 $9.34 45% off with code GOBIG
    $15
    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 $12.09 45% off with code GOBIG
    40% off estimated retail
    Carter's Board Shorts (view 2)Carter's Board Shorts (view 1)
    View Product: Carter's Board Shorts

    Carter's

    Board Shorts
    Size 18 mo
    $18.99 $10.44 45% off with code GOBIG
    46% off estimated retail
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