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Shop Women's Swimwear at up to 90% off estimated retail! thredUP has a huge selection of gently used women's swimwear. Find bikinis, one-pieces, board shorts and cover ups from brands like Seafolly, Aqua or Speedo at thredUP.

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    Athleta Board Shorts (view 2)Athleta Board Shorts (view 1)
    View Product: Athleta Board Shorts

    Athleta

    Board Shorts
    Size 3X Plus
    $28.99
    50% off estimated retail
    Cupshe Swimsuit Top (view 2)Cupshe Swimsuit Top (view 1)
    View Product: Cupshe Swimsuit Top

    Cupshe

    Swimsuit Top
    Size 3X Plus
    $11.99 $9.59 20% off with code THANKU
    36% 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 3X Plus
    $15.99 $11.19 30% off with code THANKU
    57% off estimated retail
    Assorted Brands Swimsuit Top (view 2)Assorted Brands Swimsuit Top (view 1)
    View Product: Assorted Brands Swimsuit Top

    Assorted Brands

    Swimsuit Top
    Size 28 Plus
    $15.99 $11.99 25% off with code THANKU
    36% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 3X Plus
    $12.99 $9.74 25% off with code THANKU
    48% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $14.99 $10.49 30% off with code THANKU
    40% off estimated retail
    Cocoship Swimsuit Top (view 2)Cocoship Swimsuit Top (view 1)New With Tags
    View Product: Cocoship Swimsuit Top

    Cocoship

    Swimsuit Top
    Size 3X Plus
    $8.99 $7.19 20% off with code THANKU
    52% off estimated retail
    J.Crew One Piece Swimsuit (view 2)J.Crew One Piece Swimsuit (view 1)
    View Product: J.Crew One Piece Swimsuit

    J.Crew

    One Piece Swimsuit
    Size 0
    $33.99 $22.09 35% off with code THANKU
    73% off estimated retail
    Aqua Green Swimsuit Top (view 2)Aqua Green Swimsuit Top (view 1)
    View Product: Aqua Green Swimsuit Top

    Aqua Green

    Swimsuit Top
    Size 3X Plus
    $15.99 $11.19 30% off with code THANKU
    36% off estimated retail
    Catalina Swimsuit Bottoms (view 2)Catalina Swimsuit Bottoms (view 1)
    View Product: Catalina Swimsuit Bottoms

    Catalina

    Swimsuit Bottoms
    Size 3X Plus
    $7.99 $6.39 20% off with code THANKU
    38% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 0
    $5.99 $4.79 20% off with code THANKU
    76% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $12.99 $7.79 40% off with code THANKU
    48% off estimated retail
    Lascana Swimsuit Cover Up (view 2)Lascana Swimsuit Cover Up (view 1)Price Drop
    View Product: Lascana Swimsuit Cover Up

    Lascana

    Swimsuit Cover Up
    Size 0
    $9.99 $7.99 20% off with code THANKU
    79% off estimated retail
    Shein Two Piece Swimsuit (view 2)Shein Two Piece Swimsuit (view 1)Price Drop
    View Product: Shein Two Piece Swimsuit

    Shein

    Two Piece Swimsuit
    Size 3X Plus
    $9.99 $6.99 30% off with code THANKU
    58% off estimated retail
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)Price Drop
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 3X Plus
    $7.99 $6.39 20% off with code THANKU
    50% off estimated retail
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