Best Swim Trunks for Baby Boys of 2026

Bonnie Salem Avatar
Bonnie Salem
Last Updated: Jan 10, 2026

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Swim trunks for baby boys are the perfect addition to their summer wardrobe. These adorable and functional swimwear options are designed to keep little ones comfortable and protected while they splash around in the water. Made with soft and lightweight materials, these swim trunks feature cute patterns and vibrant colors that will make your baby boy stand out at the pool or beach. With an elastic waistband and adjustable drawstring, these swim trunks ensure a secure and snug fit. Whether it's a family vacation or a day at the local pool, these swim trunks are a must-have for your little water enthusiast.

At a Glance: Our Top Picks

Gerber Baby Boys Toddler Swim Trunks 2-Pack Cover #TOP 1
Gerber Baby Boys Toddler Swim Trunks 2-Pack
ftb score rating icon 9.9
RUGGEDBUTTS Boys UPF50+ Seersucker Swim Trunks Cover #TOP 2
RUGGEDBUTTS Boys UPF50+ Seersucker Swim Trunks
ftb score rating icon 9.8
Flap Happy Wesley Boys' UPF 50+ Swim Trunks Cover #TOP 3
Flap Happy Wesley Boys' UPF 50+ Swim Trunks
ftb score rating icon 9.6

Top 10 Swim Trunks for Baby Boys

#TOP 1

Gerber Baby Boys Toddler Swim Trunks 2-Pack

438391
Orange Surf
Gerber Baby Boys Toddler Swim Trunks 2-Pack Cover
Gerber Baby Boys Toddler 2-Pack Swim Trunks, Orange Surf, 3T

The Gerber Toddler Swim Trunks are designed to keep your little one comfortable and protected during water play. Made with fabric that blocks out over 98% of the sun’s harmful rays, these trunks help shield your child’s sensitive skin. The quick-drying material means less time feeling wet and less chance of irritation or rashes after swimming. A stretchy waistband ensures a snug but gentle fit, so your toddler can move freely without discomfort. With fun patterns and bright colors, these swim trunks are both practical and stylish for your child’s beach or pool days.

What We Like
UPF 50+ sun protection
Quick-drying fabric
Comfort-stretch waistband
Fun patterns and colors
#TOP 2

RUGGEDBUTTS Boys UPF50+ Seersucker Swim Trunks

2SW0371-00-SEERSUCKER
12-18 Months
RUGGEDBUTTS Boys UPF50+ Seersucker Swim Trunks Cover
RUGGEDBUTTS Boys UPF50+ Sun Protection Seersucker Swim Trunks - Periwinkle Blue Seersucker, 12-18m

The RUGGEDBUTTS UPF50+ Swim Trunks offer excellent sun protection with fabric that blocks 98% of harmful UV rays, keeping your little one safe during outdoor play. The water-repellent material helps keep the trunks dry and comfortable, reducing sogginess after splashing around. An elastic waistband ensures a snug but flexible fit, making it easy for your baby to move freely without discomfort. Plus, the functional ties allow you to adjust the fit for added security. These swim trunks are designed with an inner mesh lining to provide extra comfort and support, making them a great choice for active babies.

What We Like
UPF 50+ sun protection
Water-repellent fabric
Elastic waistband
Adjustable functional ties
Inner mesh lining
#TOP 3

Flap Happy Wesley Boys' UPF 50+ Swim Trunks

WESG-COCO-6
Coco Beach Turtles
6 Years
Flap Happy Wesley Boys' UPF 50+ Swim Trunks Cover
Flap Happy Boys' UPF 50+ Wesley Swim Trunks with Mesh Liner, Coco Beach Turtles

The Flap Happy Wesley Swim Trunks offer excellent sun protection with their UPF 50+ fabric, which blocks over 97% of harmful UV rays, helping keep your child safe during outdoor play. Made from a quick-drying blend of recycled and regular polyester, these trunks help prevent discomfort like diaper rash by drying fast after water activities. Despite their high UV protection, the material is lightweight and breathable, ensuring your little one stays comfy without feeling hot or sweaty. Plus, the vibrant colors are designed to resist fading, so the trunks look great wash after wash, making them a durable choice for beach or pool days.

What We Like
UPF 50+ sun protection
Quick-dry fabric
Lightweight and breathable
Fade-resistant colors
#TOP 4

RUGGEDBUTTS Boys UPF50+ Jawsome Swim Trunks

2SW0371-00-ANIMALS
Jawsome
RUGGEDBUTTS Boys UPF50+ Jawsome Swim Trunks Cover
RUGGEDBUTTS Boys UPF50+ Sun Protection Animal Swim Trunks - Jawsome, 3T

The RUGGEDBUTTS Boys Swim Trunks offer excellent sun protection with fabric designed to block 98% of harmful UV rays, keeping your child safe during outdoor play. The water-repellent material helps keep the trunks light and comfortable by quickly shedding water. An elastic waistband ensures a snug yet flexible fit, making it easy for your child to move freely. Inside, a mesh lining adds breathability and comfort, preventing irritation while supporting quick drying. These features combine to provide a practical and comfortable swimwear option for active kids.

What We Like
UPF 50+ sun protection
Water-repellent fabric
Elastic waistband
Inner mesh lining
#TOP 5

RUGGEDBUTTS UPF50+ Boys Swim Trunks

2SW0371-00-FRUITS+FLORALS
Lemon Capri
RUGGEDBUTTS UPF50+ Boys Swim Trunks Cover
RUGGEDBUTTS Boys UPF50+ Sun Protection Fruits & Florals Swim Trunks - Lemon Capri, 3T

The RUGGEDBUTTS Boys Swim Trunks offer excellent sun protection with a UPF 50+ fabric that blocks out 98% of harmful UV rays, keeping your child safe during outdoor play. Their water-repellent material helps keep the trunks dry and comfortable, so your little one can enjoy swimming without feeling weighed down. The elastic waistband provides a snug but flexible fit, making it easy for kids to move around freely. Additionally, the inner mesh lining adds extra comfort and support, making these trunks great for active days at the pool or beach.

What We Like
UPF 50+ sun protection
Water-repellent fabric
Elastic waistband
Inner mesh lining
#TOP 6

Sisterly Market Swim Shorts - Stripes

Tan Stripe
18-24 Months
Sisterly Market Swim Shorts - Stripes Cover
Sisterly Market - Toddler Swim Shorts, Baby Swimsuit with Stretchy Spandex Liner and Breathable Outer Microfiber Fabric, Baby Boy Bathing Suit Ages 18 to 24 Month, Tan Stripes

Introducing the Sisterly Market Swim Shorts - Stripes, the perfect swim trunks for your little one. These swim shorts come in various sizes to accommodate babies and toddlers of different ages. With a stretchy liner, elastic waistband, and drawstring, these shorts ensure the perfect fit for your child. The size 1 option is recommended for babies aged 6-18 months, while the size 2T is ideal for 18 months to 2 years. The rest of the sizes run true-to-size. The drawstring tie allows for easy sizing up if needed. Made with high-quality materials, the shorts are durable and comfortable. The outside fabric is 100% polyester/microfiber, while the lining is made of 86% nylon and 14% spandex. These swim shorts are machine washable, making them convenient for busy parents. Get your little one ready for a day at the beach or pool with the Sisterly Market Swim Shorts - Stripes.

What We Like
Versatile sizing
Adjustable fit
Durable materials
#TOP 7

SwimZip Shorties UPF 50+ Swim Shorts

Surf's Up
SwimZip Shorties UPF 50+ Swim Shorts Cover
SwimZip Shorties - UPF 50+ Swim Shorts - Baby, Toddler, and Kids - Boys' or Girls

The SwimZip Shorties Shorts offer excellent sun protection, certified by the Skin Cancer Foundation, so you can trust they keep your child safe from harmful rays. Their built-in UPF 50+ fabric blocks 98% of UVA and UVB rays, helping prevent painful sunburns and letting your child enjoy outdoor water fun longer without constant sunscreen reapplication. The shorts are designed with stretchy, short-length fabric for easy movement, even when wet, making playtime more comfortable. Plus, their chlorine-resistant material ensures they stay durable through many pool visits. The adjustable waistband helps keep the shorts snug and secure for your active little one.

What We Like
Skin Cancer Foundation certified
UPF 50+ sun protection
4-way stretch fabric
Chlorine-resistant material
Adjustable waistband
#TOP 8

RUGGEDBUTTS Navy Gingham UPF50+ Swim Trunks 12-18m

2SW0371-00-GINGHAM
Navy Gingham
12-18 Months
RUGGEDBUTTS Navy Gingham UPF50+ Swim Trunks 12-18m Cover
RUGGEDBUTTS Boys UPF50+ Sun Protection Gingham Swim Trunks - Navy Gingham, 12-18m

The RUGGEDBUTTS Gingham Swim Trunks offer excellent sun protection with fabric that blocks out 98% of harmful UV rays, keeping your little one safe during outdoor play. The water-repellent material helps keep the trunks lightweight and quick-drying, so your baby stays comfortable even after splashing around. An elastic waistband ensures a snug, flexible fit that’s easy to put on and take off. Inside, a soft mesh lining adds extra comfort and breathability for your baby’s sensitive skin. These features combine to make a practical and cozy swimwear choice for your child.

What We Like
UPF 50+ sun protection
Water-repellent fabric
Elastic waistband
Inner mesh lining
#TOP 9

RUGGEDBUTTS Boys UPF50+ Swim Trunks Green 3T

2SW0371-00-STRIPED
Green
RUGGEDBUTTS Boys UPF50+ Swim Trunks Green 3T Cover
RUGGEDBUTTS Boys UPF50+ Sun Protection Striped Color Block Swim Trunks - Green, 3T

The RUGGEDBUTTS UPF50+ Swim Trunks offer excellent sun protection with fabric that blocks 98% of harmful UV rays, keeping your little one safe during outdoor play. The water-repellent material helps keep the trunks dry and comfortable, so your child can enjoy swimming without feeling weighed down. An elastic waistband ensures a snug yet flexible fit, making it easy for your child to move around freely. Inside, a soft mesh lining adds extra comfort and support. These swim trunks combine practicality and protection, making them a great choice for active kids.

What We Like
UPF 50+ Sun Protection
Water-Repellent Fabric
Elastic Waistband
Inner Mesh Lining
#TOP 10

maamgic Boys Swim Trunks with Compression Liner

Shark Blue
maamgic Boys Swim Trunks with Compression Liner Cover
maamgic Boys Swim Trunks with Compression Liner Quick Dry Swim Shorts Anti-Chafe Boy Bathing Suit with Boxer Brief Toddler Swimsuit Shark Blue 4T

The maamgic Boys Swim Trunks offer a comfortable fit with their built-in compression liner made from soft materials, which helps protect sensitive areas and prevents chafing during active play. The elastic waistband combined with an adjustable drawstring ensures the shorts stay securely in place, giving you peace of mind while your child swims or runs. With practical side pockets lined with quick-drying mesh, you can easily store small items without worry. Plus, the trunks come in various sizes to fit your child perfectly, allowing for a comfortable and secure swim experience tailored to their body shape.

What We Like
Compression liner for comfort
Elastic waistband with drawstring
Quick-dry mesh pockets
Multiple size options
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What should a baby boy wear swimming?

For swimming, baby boys should wear standard swimming costumes along with a swim nappy to prevent accidents in the pool. It is recommended to choose baby swimwear with an integrated swim nappy or use a reusable swim nappy with their usual swimming costume to ensure no leakage of feces into the pool.

2. What should 1 year old wear for swimming?

For a 1-year-old, it is advisable to dress them in swimwear with UV protection when swimming outdoors. To prevent leaks, you can use reusable swim diapers like the Happy Nappy. From this age, babies can also start wearing float suits or vests in the pool.

3. Do you wear swim trunks over swim diaper?

Yes, you can still dress your baby in cute swimsuits over a swim diaper. Swim diapers are designed to hold solid waste but not liquid, so you don't have to worry about a saggy bottom. Adding swim trunks or swimsuits over the swim diaper provides added style and protection.

4. What do boys wear in the swimming pool?

Boys can wear swim trunks, swim briefs, or jammers in the swimming pool. It is recommended to choose swim trunks that do not run too long to avoid interfering with their kicking. The trunks should stop just above their knees for optimal comfort and mobility.

5. Do boys wear anything under swim trunks?

In most cases, boys do not wear underwear under swim trunks. However, there are some rare instances where wearing underwear with swim trunks may make sense, such as beach or pool days when swimming is not the primary activity. In general, it is not necessary to wear underwear with swim trunks.

6. Do swim diapers soak up pee?

No, swim diapers are not designed to absorb pee. They are specifically designed to withstand water and contain solid waste. While pee will pass through swim diapers and into the water, swim diapers are effective in preventing fecal contamination in public pools.

Editor's Notes

During our swim trunk for baby boys research, we found 48 swim trunk for baby boys products and shortlisted 10 quality products. We collected and analyzed 8,819 customer reviews through our big data system to write the swim trunks for baby boys list. We found that most customers choose swim trunks for baby boys with an average price of $20.35.

The swim trunks for baby boys are available for purchase. We have researched hundreds of brands and picked the top brands of swim trunks for baby boys, including Gerber, RUGGEDBUTTS, Flap Happy, Sisterly Market, SwimZip. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Bonnie Salem Avatar

Bonnie Salem is a stay-at-home mother with two-year-old twins and has spent almost half of her life surrounded by baby products. As a mother and a professional copywriter, she has an insightful and unique eye for researching products suitable for infants. Bonnie Salem is an expert in health and nutrition who lives with her family in New Jersey. She has over 15 years of working experience in an institute of medicine after graduating from the University of Toronto. She is highly interested in personal health and wellness.