Best Swimsuits for Tweens

Tween years are all about confidence, curiosity, and discovering personal style — and swimwear is no exception. Whether your kiddo lives for pool days, beach trips, or family lake getaways, the right swimsuit makes all the difference. At Nani, we believe every tween should feel comfortable, confident, and ready to move in their swim gear — without sacrificing style.

Here’s your guide to the best swimsuit styles for tweens, built for movement, comfort, and longevity.

One-Piece Wonders: Classic + Active

One-piece swimsuits remain a top pick for tweens who want versatility and comfort. They’re perfect for everything from swim lessons to cannonballs off the dock.

Why tweens love them:

• Full coverage that feels secure

• Great for swimming laps or playing water games

• Stylish in bold colors or subtle patterns

Tip: Look for one-pieces with soft seams, adjustable straps, and just enough stretch. A secure fit builds confidence and keeps the focus on fun.

Sporty Two-Piece Sets: Mix & Match Freedom

Tween fashion is all about personalization — and two-pieces allow swimmers to create a look that feels like them. Sporty sets with athletic cuts offer the perfect balance of style and function.

Best for:

• Pool parties

• Beach volleyball

• Long lake days

• Active adventures

Pair playful prints with classic solids for a look that feels elevated but still fun. The ability to mix and match also makes packing for trips easier.

Rash Guards & Swim Shirts: Extra Coverage, Maximum Fun

For sun protection and high-energy beach days, rash guards are a tween essential. Whether layered over a suit or worn on their own, they help protect skin while keeping the look cohesive.

Benefits:

• Added sun protection during peak hours

• Comfortable for all-day wear

• Easy layering option for changing temperatures

Choose timeless stripes, subtle florals, or color-blocked designs for a look that feels current but not overly trendy.

Board Shorts & Skorts: Playful + Practical

Some tweens prefer extra coverage, and board shorts or swim skorts provide exactly that. These pieces pair perfectly with fitted swim tops or rash guards and transition seamlessly from water to snack breaks.

Why parents love them:

• Functional for active play

• Comfortable, non-restrictive fit

• Easy to pair with other swim pieces

They’re especially great for beach days that include exploring, paddleboarding, or biking along the boardwalk.

What to Look For: Tween-Approved Features

When shopping for tweens, the right details make all the difference:

• Comfortable fabrics: Quick-dry, stretchy, and soft against the skin

• Secure fit: Adjustable straps or waistbands for growing bodies

• Sun protection: SPF-rated fabrics for long summer days

• Timeless style: Prints and colors that reflect personality without feeling too mature

Let Them Lead

Tween years are about discovering what feels good and what feels like “me.” Some gravitate toward bold patterns and bright colors, while others prefer soft neutrals and classic silhouettes. Both are beautiful — confidence is what makes it shine.

Ask simple questions like:

• Do you like bright or neutral tones?

• Do you want something sporty or more relaxed?

• What makes you feel comfortable and confident?

Letting them be part of the decision builds ownership and ensures they’ll actually want to wear their suit.