Best Baby Swimsuits & Swimwear 2026 | EasyTot

Your Complete Guide to the Best Baby Swimsuits & Swimwear

A baby's first summer is one of those milestones that seems to sneak up on every parent. One week you're zipping up a fleece bunting for a breezy stroller walk, and the next you're trying to figure out which swimsuit will actually survive a splash pad, a sandy beach, and a grandparent's phone camera. Baby swimwear occupies a strange little corner of the wardrobe: it has to look adorable for exactly the right ten seconds of photos, stand up to chlorine and salt water, dry quickly between pool and car, and — most importantly — offer real sun protection to skin that burns in minutes.

The good news is that the baby swimsuit market has evolved dramatically in the last few years. Premium small brands now make genuinely beautiful pieces in breathable recycled polyester, stretch nylon, and soft smocked cotton, many of them in the true baby size range of 3 months to 24 months that used to be nearly impossible to find. UPF-rated rash guards are no longer boxy or shapeless — they come in long-sleeve zipped styles that are easy to wrestle onto a wriggling one-year-old and actually keep their shape after a dozen pool days. Swim coverups and sun suits have become a category of their own, giving babies full-body coverage without the overheating that traditional cotton outfits cause on hot beach days.

In this guide, we have organized our favorite baby swimwear from EasyTot into six practical categories — each designed around a real parenting situation rather than a marketing angle. Whether you're packing for a first beach trip, registering for a summer baby shower, shopping for a toddler's swim class, or looking for a sun-protective coverup for a fair-skinned baby, the sections below will point you to the pieces most likely to earn their keep. Every product featured is sized for babies (roughly 3 months through 24 months, with some styles going up to 2T), and every brand has been vetted for fabric quality, fit, and the kind of construction details that matter when you're changing a baby in a hot bathroom at the pool.

Swim Diapers

Before baby hits the pool or beach, you need a reliable swim diaper — most public pools and swim classes require them. Unlike regular diapers that swell up and fall apart in water, swim diapers are designed to contain solids while letting water pass through, keeping baby comfortable and the pool sanitary.

Reusable swim diapers are the clear winner for families who swim regularly. They save money over disposables, fit snugly with adjustable snaps, and come in adorable prints your baby can wear as a standalone bottom. Many of our picks include matching sun hats for a complete pool-ready look. For occasional swimmers or travel, disposable swim diapers are a convenient backup.

Look for a secure but gentle waistband and leg openings that are snug enough to do their job without leaving marks on baby's skin. Most reusable swim diapers fit babies from about 6 months through toddlerhood, making them a smart investment that lasts multiple swim seasons.

Baby Girls' One-Piece Swimsuits

One-piece swimsuits are, for most parents, the single most practical baby swim piece. They stay put during crawling, paddling, and the inevitable stumble into the pool edge; they cover the midsection (which is almost always the fussiest part of the body to keep warm in cool pool water); and they make diaper changes more manageable than a two-piece because you're only dealing with one garment instead of two. For babies who aren't walking yet, a one-piece is usually the right choice every single time.

The three one-pieces in this section share a few key qualities. All use a soft nylon-spandex or polyamide blend that feels gentle on baby skin and dries quickly between dunks. All have reinforced leg openings that won't stretch out after a few wash cycles. And all come in saturated, photo-friendly prints rather than the washed-out pastels that tend to dominate the mass-market baby swim aisle. These are the suits you buy because you actually want to see them in photos a year later.

Fit guidance: most baby one-pieces run slightly small, especially in the torso. If your baby is on the taller side for their age, consider sizing up one step. Rylee Faith's Crocodile Green in particular has a tighter torso cut that works beautifully on a petite 9-month-old but may feel snug on a tall 12-month-old.

Baby Girls' Bikinis, Tankinis & Summer Sets

Baby bikinis occupy a slightly controversial spot in the swim world, but for most families they end up being the single most-photographed swim piece of the summer. Far from being impractical, the best baby bikinis are purposefully designed with high-waisted bottoms that provide ample coverage and wide straps on the top that actually stay put during play. They are, in practice, closer to a one-piece with a visible midriff than the string-bikini style adults wear.

The styles in this section are all true baby-sized — meaning they're sized to fit a baby roughly 12 months through 24 months, with top and bottom pieces scaled to a toddler body rather than just a miniaturized adult silhouette. Love and Grow's Bermuda and Glass Slipper styles are both high-waisted bikinis with a retro cut that feels sweeter than sexy, and Mila & Rose's Aloha Shorty is a short-sleeve one-piece that pairs perfectly with the same tropical aesthetic.

These are best for babies who aren't quite walking — they photograph beautifully at the pool or beach, and the wide waistbands don't chafe during crawling. For babies who are cruising or walking, a more secure style (either a fully covered one-piece or a tankini with connecting straps) is usually a better practical choice so that no one has to chase a toddler across the pool deck to adjust bikini bottoms.

Baby Boys' Swim Trunks & Swim Shorts

Baby boys' swim trunks have come a long way from the stiff, scratchy nylon shorts that dominated the category for decades. The three options in this section are all soft, flexible, and quick-drying, with elasticated waists that accommodate a diaper or swim diaper underneath. They look like real surf shorts from a distance but are sized specifically to fit a baby or early toddler body without the bulk of adult-cut shorts.

Look for three features when shopping for baby boys' swim shorts. First, an elastic waist with an internal drawstring that stops once tied (loose drawstrings are a hazard). Second, a mesh lining that reduces the amount of water the short holds when baby gets out of the pool. Third, reinforced stitching at the leg openings — this is where cheap swim shorts fall apart first, usually within a single summer.

All three picks below meet these criteria. Love and Grow's Bermuda Versa Short is the most traditional American cut, Cabana Stripe is a slightly longer surf short with a preppy stripe, and Montce's Ali Paisley Mini is the most fashion-forward option with a bold paisley print that pairs well with a plain rash guard on top.

UPF Rash Guards & Sun-Protective Swimwear

If you only buy one piece of baby swimwear this summer, make it a proper UPF 50+ rash guard. Babies under six months should not wear sunscreen according to most pediatric guidance, which means physical sun protection — hats, shade, and rated swim fabrics — is the only reliable defense against burns. Even for older babies, a rash guard dramatically reduces the amount of skin that needs sunscreen reapplication and prevents the chapping that salt water and cold pool water can cause on delicate skin.

The two key things to look for in a baby rash guard are the UPF rating and the closure. UPF 50+ is the gold standard and blocks more than 98% of UV radiation. Anything rated less (or, more commonly, anything with no rating at all) is essentially just a shirt. The closure matters almost as much: a full-length front zipper transforms the dressing experience, turning a five-minute wrestling match into a ten-second pull-and-zip. Most premium baby rash guards now come in zipped styles specifically because parents demanded them.

The three picks in this section cover the full spectrum: Mon Coeur's Sepia Dotted Zipped is our favorite true zipped rash guard and uses recycled polyester for a soft-against-skin feel. Love and Grow's Long Sleeve Rashguard is a traditional pull-over style in a cheerful print, and their Pink Palm Paradise One-Piece Rashguard Suit combines a rash guard top with swimsuit bottoms in a single pull-on piece — a great option for pool-heavy vacations where you want full coverage without layering.

Baby Sun Suits, Smocked Suits & Swim Coverups

Sun suits and swim coverups are the underrated heroes of the baby swimwear wardrobe. A traditional smocked sun suit (like the Angel Dear picks below) is typically worn without anything underneath and serves as both a charming outfit and a sun-protective layer for young babies. A swim coverup (like Love and Grow's Heritage Flag) goes over a wet swimsuit after pool time, preventing a cold car ride home and doubling as sun protection during walks along the beach.

For babies under six months, a smocked sun suit is often the smartest swim wardrobe choice. The cotton construction is breathable enough for hot weather, the smocking stretches with a growing baby body, and the bubble-style silhouette gives plenty of room for a bulky swim diaper. Angel Dear's G is for Golf sunsuit comes in two versions — a clean simple cut and a ruffled ric rac version — both sized from 0-3M, which is genuinely useful for newborn summer babies.

Coverups work best from about 12 months onward, once baby is large enough to keep one on without fussing. The Heritage Flag coverup from Love and Grow is terry-cloth lined, which means it's absorbent enough to dry baby's wet skin on contact — a feature you'll appreciate at the end of every pool visit when you're still shivering and baby needs to be warm for the ride home.

How to Choose Baby Swimwear: The Complete Buying Guide

Baby swimwear can feel deceptively simple to shop for — it's just a tiny swimsuit, right? — but the reality is that a few small decisions at the purchase stage make the difference between a suit you love and one that gets retired after two pool visits. Here are the things that actually matter, in rough order of importance.

Sun protection first. A baby's skin burns dramatically faster than an adult's. For babies under six months, sunscreen is generally discouraged, which means physical coverage is the only reliable sun defense. Look for UPF 50+ rated fabrics (not just "swim material"), long-sleeve styles for pool-heavy days, and high necklines or zip-up closures that cover the upper chest. A proper rash guard will save more skin than any amount of shade-seeking.

Fit that accommodates a swim diaper. Most babies under two will wear a swim diaper underneath their swimsuit, which adds about a quarter-inch of bulk around the waist and thighs. The best baby swim brands account for this by cutting their leg openings slightly wider than equivalent adult styles and using soft elastic that doesn't dig into chubby thighs. A snug-fitting suit over a swim diaper can cause red marks and chafing; a well-designed suit will feel loose at first and snug down gently as the swim diaper absorbs.

Quick-dry fabric for car rides home. The ability to dry quickly between the pool and the car matters more than most parents anticipate. Nylon-spandex blends dry the fastest (usually within 10-15 minutes of wringing); cotton-lycra blends feel softer but stay wet for an hour or more. For a day at a public pool or the beach, quick-dry synthetic is almost always the right call. Save cotton sunsuits for hot backyard afternoons where you don't need to drive anywhere afterward.

Easy closures matter at age 1 and up. From about 9 months on, babies become remarkably uncooperative about getting dressed, and a swimsuit with a complicated closure can turn pool time into a stress spiral. Zipped rash guards are the gold standard for ease. Pull-on one-pieces are a close second. Avoid styles with multiple snaps at the crotch (these are meant for onesies, not swimsuits) and anything that requires pulling fabric over a wet baby's head after swim time.

Size up, especially for tall babies. Most baby swimwear runs small, particularly in the torso. If your baby is in the 75th percentile or above for height, start with a size up and use the extra length for wiggle room during crawling. Swim fabric has a limited stretch, and a suit that's slightly too small will cut into the shoulders and cause visible red marks within minutes.

Buy one great suit instead of three mediocre ones. This is the advice we give most often in the baby swim category. A $40 suit that's comfortable, well-constructed, and fits correctly will be worn dozens of times; three $15 suits from a mass-market site will be worn once each before they end up at the bottom of the diaper bag. Quality wins on every axis — comfort, photos, and the ability to hand the suit down to the next baby in the family.

Frequently Asked Questions About Baby Swimwear

When can babies start wearing swimsuits?

Most pediatricians recommend waiting until at least six weeks before bringing a baby to the pool, though some parents wait until two or three months to allow baby's immune system to develop further. Once you do start pool outings, a proper baby swimsuit (with a swim diaper underneath) is essential both for modesty at public facilities and for warmth in cool water. For very young babies, a smocked cotton sun suit or a full-coverage UPF rash guard is usually the most practical choice.

Do babies need to wear a swim diaper?

Yes, absolutely — and most public pools and swim schools require it. Regular diapers become waterlogged and useless within seconds of hitting the water. Swim diapers are designed to contain solid waste while letting urine pass through (which sounds strange but prevents the diaper from ballooning up). Disposable swim diapers are convenient for day trips; reusable ones are better for regular swim class attendance. Either way, a swim diaper should always go under the swimsuit, never over it.

What UPF rating should I look for in baby swimwear?

UPF 50+ is the gold standard and blocks more than 98% of UV radiation. UPF 30 blocks about 97% and is acceptable for casual pool use. Below UPF 30, the rating stops being meaningful. Many mass-market baby swimsuits are not rated at all, which usually means they offer minimal sun protection even if the fabric looks opaque. Always check the product description for a specific UPF number before trusting a suit for outdoor use.

How do I care for baby swimwear to make it last?

Rinse the suit in cool fresh water immediately after every swim (chlorine and salt water both degrade elastic and fabric over time). Don't twist or wring the suit — press out the water gently between your hands or a clean towel. Hang to dry out of direct sunlight, which can fade colors and break down elastic. Avoid the dryer entirely, and skip fabric softener (it coats the fabric and reduces UPF effectiveness).

What's the difference between a rash guard and a swim shirt?

A true rash guard is a snug-fitting, UPF-rated top made from a nylon-spandex or polyester blend specifically designed to protect skin from sun and chafing. A swim shirt is looser-fitting and often made from cotton or cotton-blend fabrics, which provides less reliable sun protection and takes much longer to dry. For babies, a rash guard is almost always the better choice because it doesn't balloon up in the water, doesn't retain cold moisture, and offers measurable UPF protection.

Can my baby wear a one-piece swimsuit without a rash guard over it?

Yes — many baby one-pieces are made from the same UPF-rated fabric as rash guards and provide equivalent sun protection on the areas they cover. The only consideration is coverage: a one-piece typically leaves the arms and legs exposed, so for extended sun exposure you'll still want to add a hat, sunscreen on exposed skin (for babies over six months), and ideally a long-sleeve rash guard on top. For shaded pool time, a one-piece alone is usually plenty.

What size swimsuit should I buy for a 12-month-old?

Most baby swimwear is sized to match standard baby clothing sizes, so a 12M suit fits a baby roughly 20-22 pounds and 29-31 inches long. Because swim fabric has limited stretch, we recommend sizing up one step if your baby is in the 75th percentile or above for height or weight. A suit that's slightly loose will feel comfortable; a suit that's slightly tight will cut into shoulders and thighs. When in doubt, always go up a size.

Are smocked sun suits considered swimwear?

Yes — smocked cotton sun suits (like the Angel Dear styles in our guide) are a traditional form of baby swimwear, particularly popular for babies under a year old. They work beautifully for pool lounging, sprinkler play, and beach afternoons, especially for very young babies who aren't ready for synthetic swim fabric. The key limitation is drying time: cotton sun suits stay wet much longer than nylon-spandex styles, so they're best for leisurely days at home rather than structured pool outings.

When should I replace a baby swimsuit?

Most baby swimsuits are outgrown before they wear out, especially in the first year when babies are rapidly growing through sizes. The exception is chlorine damage: if you swim two or more times a week, even a quality suit will start to lose its elasticity and color within about a single summer. Check the leg openings every few weeks — if the elastic has visibly stretched out or the fabric has become thin, it's time for a replacement.

Frequently Asked Questions