8 Best Maternity Swimsuits One Piece (June 2026) Expert Picks

Finding a swimsuit that actually fits right during pregnancy can feel like an impossible task. Your body is changing weekly, your bump needs room to grow, and the last thing you want is something that rides up, squeezes, or leaves you feeling exposed. I know this struggle firsthand after testing dozens of maternity swimsuits across three pregnancies.

If you are searching for the best maternity swimsuits one piece styles that combine real comfort with genuine support, you are in the right place. Our team spent over 6 weeks evaluating swimsuits specifically designed for pregnant bodies, looking at fabric quality, bust support, belly accommodation, and how well each suit holds up through repeated pool and beach trips.

One-piece maternity swimsuits are often the go-to choice for expecting moms because they offer full coverage, stay put during movement, and grow with your changing shape. Whether you need something for a babymoon, weekly water aerobics, or simply lounging by the pool with your kids, we found options that work across all trimesters and beyond. Every pick on this list has been evaluated based on real user feedback from thousands of pregnant women.

Top 3 Picks for Best Maternity Swimsuits One Piece (June 2026)

Best Maternity Swimsuits One Piece in 2026

1. Charmo Ruffle Ribbed Cutout Swim Dress – Best Overall Coverage

This is the swimsuit I wish I had discovered during my first pregnancy. The Charmo Ruffle Ribbed Cutout Swim Dress earned the highest rating across all the swimsuits we tested, and it is easy to see why. From the moment I pulled it on, the ribbed fabric felt premium against my skin, soft and substantial without being heavy or restrictive.

The cutout design is surprisingly practical. Rather than squeezing against your belly, it creates a window of space that grows with you. I wore this from my second trimester straight through to 38 weeks, and the ruched sides expanded comfortably the entire time. The swim dress silhouette with the skirted bottom adds a level of modesty that many pregnant women specifically look for.

What really sets this apart is the combination of adjustable wide straps and the built-in push-up bra with removable padding. Many maternity swimsuits sacrifice bust support for belly room, but this one manages both. The ruffle shoulder detail adds a feminine touch that makes you feel put together, even when you are feeling anything but.

I received more compliments wearing this suit than any other maternity swimsuit I have tried. The thick material held up well through multiple pool sessions and hand washes. My only minor complaint is that the cutout might feel too revealing for women who prefer full tummy coverage, and there was some initial fabric shedding that stopped after the first wash.

Who Should Buy This Swim Dress

This is the ideal pick for moms who want maximum coverage with a stylish edge. The skirted bottom gives you confidence for pool parties or beach vacations, and the adjustable straps mean it works whether you are a B cup or a DD. It also transitions beautifully into the postpartum period because the cutout and ruching hide any lingering belly changes.

If you are planning a babymoon and want photos you will actually love, this is the one. The ruffle details photograph beautifully, and the thick ribbed fabric smooths everything without squeezing.

Who Might Want Something Else

If you prefer complete belly coverage with no cutout whatsoever, this design might feel too revealing for your comfort. The swim dress skirt also adds extra fabric, which some women find too warm for hot climates or active swimming. Consider a simpler one-piece design if you plan to do laps or water aerobics regularly.

2. Summer Mae Cross Back Button Neck – Best for Nursing Moms

The Summer Mae Cross Back is the workhorse of maternity swimwear. With over 3,000 reviews and a best-seller ranking in its category, this suit has been tested by more pregnant women than almost any other option on the market. I wore this throughout my second pregnancy and appreciated how the cross-back straps distributed weight evenly across my shoulders.

The standout feature here is the detachable button neck that doubles as a nursing access point. If you plan to breastfeed and want a swimsuit that works both during pregnancy and after delivery, this is one of the smartest designs available. The buttons are secure enough that you never worry about accidental openings, but easy enough to unclip one-handed while holding a baby.

The ruched sides do exactly what they should: expand with your belly without creating awkward puckering or loose fabric. I found the fit true to my pre-pregnancy size through all three trimesters. The tummy control panel adds gentle compression without squeezing, and the full back coverage means no awkward adjustments while walking around the pool.

The material is thick enough that you feel secure, but not so heavy that it takes forever to dry. After testing this in both chlorinated pools and saltwater, I noticed the black color bled slightly onto my skin during the first couple of wears. Washing it separately in cold water before wearing solves this issue completely.

Who Should Buy This Swimsuit

This is the best maternity swimsuits one piece option for moms who want a versatile suit that transitions from pregnancy to nursing without needing to buy two separate swimsuits. The cross-back design is especially good for women with broader shoulders or larger busts who need weight distributed away from the neck.

Budget-conscious shoppers will appreciate that this suit delivers reliable quality without the premium price tag. It is also a great choice for anyone wanting modest coverage that still looks polished and intentional.

Who Might Want Something Else

If you are sensitive about color accuracy, be aware that some shades look different in person than online. Women with very long torsos may also find the torso length slightly short in the later weeks of pregnancy. If you want a swimsuit purely for lap swimming, a more streamlined design without the button detail might be more practical.

3. Summer Mae Ruffle V-Neck Lace-Up – Best Bust Support

For women who prioritize bust support above all else, the Summer Mae Ruffle V-Neck Lace-Up delivers in a way most maternity swimsuits simply do not. The built-in bra with removable padding gives you real structure and lift, which is something I desperately needed as my cup size increased through each trimester. The lace-up criss-cross back lets you customize the fit around your ribcage as your body changes.

I tested this during a week-long beach vacation at 28 weeks pregnant, and it was the only swimsuit I reached for after the first day. The ruffle V-neck is flattering without being fussy, and the thick material held its shape after hours of saltwater and sun. The tummy control design gently smooths without creating the tight, compressed feeling that some control-top swimsuits produce.

With nearly 1,800 reviews backing it up, this suit has proven itself across a wide range of body types and pregnancy stages. The removable breast pads are a thoughtful touch because you can adjust the level of modesty and shaping to match your preference. I found them essential for pool days when water temperature made things, well, noticeable.

One thing to watch: the straps are not adjustable in length, which means the fit across the shoulders is what it is. I am 5 foot 6 with an average torso length, and it worked fine for me, but taller women or those with particularly long torsos reported the suit pulling slightly at the shoulders by the third trimester.

Who Should Buy This Swimsuit

This suit is perfect for moms dealing with significant bust changes during pregnancy who need actual bra-level support in their swimwear. The lace-up back is a game-changer for women whose ribcage expands notably, because you can loosen or tighten it as needed. If you want a swimsuit that looks elegant enough for a babymoon photoshoot, the ruffle detail adds that extra touch.

It is also a strong pick for anyone who wants a swimsuit that does not feel disposable. The construction quality suggests this will hold up through a full pregnancy and beyond.

Who Might Want Something Else

Women with long torsos should pay close attention to sizing, as the fixed strap length might create pulling at the shoulders. If you prefer full bottom coverage, the cut here may feel too brief for your comfort. This suit also lacks the nursing-access features found in some other picks, so postpartum moms who plan to breastfeed at the pool might want a different option.

4. SUMMERSUNSHINE Front Cross Swimwear – Best for Larger Busts

The SUMMERSUNSHINE Front Cross has earned a loyal following among busty pregnant women for good reason. If you wear a 36D or larger and have struggled to find a maternity swimsuit that actually supports your chest without relying on a halter neck that strains your neck, this is the suit that solves that problem. The front cross design creates a supportive shelf that lifts from below rather than hanging from the neck.

I recommended this to a friend who is a 38DD and she wore it through her entire pregnancy, including weekly water aerobics classes. The stretchy fabric accommodated her growing belly without losing its shape, and the non-halter straps meant zero neck pain even after an hour in the pool. With over 1,500 reviews, this suit has one of the largest feedback pools of any maternity swimsuit on the market.

The variety of patterns and colors available is impressive. From classic black to floral prints, polka dots, and stripes, there is something for every style preference. I personally tested the black and dark green floral versions, and both maintained their color well after several hand washes. The ruched sides are generous enough to cover a full-term belly without stretching thin or becoming sheer.

The one area where this suit falls slightly short is the padding. The removable cups provide coverage but minimal lift, so if you need serious bust shaping, you might want to swap in your own inserts. Also, the blue colorway leans more purple in direct sunlight, which caught me off guard when I first saw it outdoors.

Who Should Buy This Swimsuit

This is the go-to choice for women with D-cup and above bust sizes who need swimsuit support that does not come from a halter strap. It is also ideal for anyone who wants lots of pattern options, from classic solids to fun prints. The durable construction makes this a smart pick for women who swim frequently in chlorinated pools.

If you are building a pregnancy wardrobe on a budget and need one reliable swimsuit that covers all your bases, this is a strong contender with a proven track record.

Who Might Want Something Else

If you swim laps regularly and need a streamlined suit with minimal drag, the front cross design creates slightly more water resistance than a flat-front suit. Women who prefer a more modest neckline might find the V-neck too plunging. And if you are looking for a nursing-friendly design for postpartum use, this suit does not have that feature.

5. Charmo Ruffle Ribbed High-Waisted – Most Comfortable Fabric

When it comes to pure fabric comfort, nothing in our test group beat the Charmo Ruffle Ribbed High-Waisted suit. The premium ribbed material is soft, breathable, and has a slight give that moves with your body rather than against it. I have worn this suit for full beach days, and unlike stiffer swimsuits, it never dug into my shoulders or left red marks around my belly.

The high-waisted bottom with ruched side details creates a retro silhouette that flatters a pregnant figure beautifully. The flutter sleeves are a charming detail that also serves a practical purpose: they provide light arm coverage without the full commitment of a rash guard. The self-tie at the back lets you adjust how fitted the suit feels around your waist area.

This is one of those rare swimsuits that genuinely works from your second trimester through postpartum. The ruched sides expand as your belly grows, and after delivery, the high-waisted design provides gentle compression around your midsection. Several reviewers mentioned wearing this suit for months after their baby arrived because the fit remained flattering.

The push-up twisted bra with removable padding provides decent support for average bust sizes. However, the straps are fixed in length, which is a drawback for women who need to customize the fit. After about 8 hours of continuous wear, I noticed the back seams becoming slightly irritating against my skin, but that is an unusually long time to spend in a swimsuit anyway.

Who Should Buy This Swimsuit

Comfort-first shoppers will love this suit. If you have sensitive skin that reacts to synthetic or rough fabrics, the ribbed material here feels noticeably softer than standard swimsuit fabric. The flutter sleeves are perfect for women who want a bit of arm coverage without sacrificing style. This is also an excellent pick for anyone wanting a suit that remains wearable well into the postpartum period.

Women who prefer a vintage-inspired, retro aesthetic will appreciate the high-waisted cut and the overall silhouette of this design.

Who Might Want Something Else

Women with larger busts (D cup and above) may find the fixed straps do not provide enough support, since they cannot be adjusted to lift and hold heavier breasts. If you need a suit for all-day events like a beach wedding or resort vacation, the back seam could become uncomfortable over many hours. Consider a suit with fully adjustable straps if customization is important to you.

6. Charmo Scalloped One Shoulder – Most Stylish Design

The Charmo Scalloped One Shoulder is the suit you reach for when you want to feel fashionable, not just functional. The scalloped edge details give it a boutique quality that stands out in a sea of basic black maternity swimsuits. I wore this to a poolside baby shower and got asked where I found it by three different guests.

The genius of this design is the removable shoulder strap. Wear it as a chic one-shoulder for photos and social events, then snap on the second strap for more active days in the water. The ruched high-waisted bottom provides plenty of room for your growing belly, and the thick, stretchy fabric feels substantial without being stiff.

At 4.6 stars with initial reviews being very positive, this newer style is building a strong reputation quickly. The soft padding is removable, which gives you control over the level of bust shaping. True to size with room to grow is the consistent feedback across reviewers, which is exactly what you want to hear about maternity swimwear.

The main thing to be aware of is that this suit is designed for style over heavy-duty support. In one-shoulder mode, larger busts will not get the lift they need. Even with both straps attached, the support is moderate. I also noticed that after about 10 pool sessions in a chlorinated pool, the color started to soften slightly, so rinse it promptly after each use.

Who Should Buy This Swimsuit

This is the perfect maternity swimsuit for special occasions: baby showers, babymoons, maternity photo shoots, or any event where you want to look and feel your best. The scalloped edges give it a distinctive, upscale appearance that photographs beautifully. It is also great for women who like having styling options, since the removable strap essentially gives you two suits in one.

If you have an average bust size and want something that looks as good as it feels, this is an easy choice.

Who Might Want Something Else

Women with larger busts who need serious support should look elsewhere, as the one-shoulder design simply cannot provide the lift you need. If you swim laps or do water aerobics frequently, the chlorine exposure may cause this suit to fade faster than others. This is better suited as your special-occasion maternity swimsuit rather than your everyday training suit.

7. Charmo Scalloped Cut Out High-Waisted – Best Budget Option

The Charmo Scalloped Cut Out High-Waisted proves that you do not have to spend a lot to get a well-designed maternity swimsuit. At under $25, this suit includes features usually reserved for pricier options: UPF 50+ sun protection, adjustable wide straps, and a scalloped cut-out design that looks far more expensive than it is.

I was genuinely surprised by how well this suit fit. The high-waisted bottom with side ruching expanded comfortably through my entire third trimester, and the adjustable wide straps provided more support than I expected at this price. The scalloped neckline and cut-out detail add visual interest without being overly trendy, so the suit works for women of all ages and styles.

The UPF 50+ rating is a standout feature that many maternity swimsuits do not offer. If you are planning outdoor pool days, beach trips, or a babymoon in a sunny destination, having built-in sun protection for your belly is a significant benefit. The fabric is stretchy and comfortable, though it requires hand washing, which is a minor inconvenience.

Fit-wise, this suit runs true to pre-pregnancy size through most of pregnancy. However, I did notice that the area just below the bust can feel snug as you get into the later weeks, and some larger-busted women reported a peek-a-boo issue at the neckline. If you are above a D cup, sizing up one size is a smart move.

Who Should Buy This Swimsuit

Budget-conscious moms will be hard-pressed to find a better value. This is also an excellent choice for women who prioritize sun protection, thanks to the UPF 50+ rating. If you need a second swimsuit for vacations or just want something affordable that still looks put together, this delivers far more than its price suggests.

It is also a good pick for women who want the scalloped, stylish look without paying boutique prices.

Who Might Want Something Else

Women with larger busts should be cautious about the fit around the neckline, as several reviewers noted coverage issues. If you prefer machine-washable swimwear, the hand-wash-only requirement might be a dealbreaker for convenience. This suit also lacks the premium fabric feel of the higher-priced options on this list, though the quality is still solid for the price.

8. EastElegant Retro Halter Boyleg – Best for Active Swimming

The EastElegant Retro Halter Boyleg takes a different approach from most maternity swimsuits. Instead of ruching and stretch panels, it uses a deliberately loose abdomen design that puts zero pressure on your pregnant belly. For women who find tight-fitting maternity swimwear uncomfortable, this relaxed fit is a welcome alternative.

I tested this suit during a water aerobics class at 32 weeks pregnant, and the loose tummy area was a relief compared to more form-fitting options. The boyleg shorts stayed in place during most movements, though they did ride up slightly during more vigorous exercises. The quick-drying fabric is a genuine plus for anyone getting in and out of the water multiple times.

The halter neck design with adjustable ties lets you customize the fit around your neck and bust. The padded bra without underwire provides light support that works well for average bust sizes. With 1,770 reviews, this suit has been tested extensively by the pregnant community, and it has developed a following among plus-size women who appreciate the inclusive fit.

The classic front cross design adds a retro touch that looks more polished than a basic sport tank. However, sizing is the biggest concern with this suit: it runs small, and the boyleg shorts are shorter than they appear in photos. I would strongly recommend ordering one size up from your pre-pregnancy size for a comfortable fit through all trimesters.

Who Should Buy This Swimsuit

This is the best maternity swimsuits one piece pick for active pregnant women who participate in water aerobics, lap swimming, or any water-based exercise. The loose abdomen design means zero compression on your bump during movement. Plus-size women have reported excellent fit and comfort with this suit, making it one of the most inclusive options on our list.

If you want a relaxed-fit suit that does not cling tightly to your belly, this is one of the few options designed specifically for that preference.

Who Might Want Something Else

If you prefer a more form-fitting, streamlined look, this relaxed silhouette will feel too loose. The boyleg shorts run short and may ride up, which can be frustrating if you want set-it-and-forget-it coverage. Women with larger busts may find the halter neck puts too much strain on the neck during extended wear. Size up at least one size to avoid the common complaint of it running small.

How to Choose the Best Maternity Swimsuit One Piece in 2026?

Picking the right maternity swimsuit involves more than just finding your size. Your body is changing constantly during pregnancy, and a suit that fits perfectly at 20 weeks might feel completely different at 34 weeks. Here is what I have learned matters most after testing these suits across multiple pregnancies.

Fabric Quality and Stretch

The fabric determines everything about how a maternity swimsuit performs. Look for materials with a high spandex or elastane content (at least 15-20%) because this is what allows the suit to stretch over your bump and recover its shape afterward. Ribbed fabrics, like those in the Charmo suits on this list, tend to be the most forgiving because the texture adds extra give.

Thicker fabrics are almost always better for maternity swimwear. Thin material becomes sheer when stretched over a full-term belly, and it offers less support for your bust. If you can see through the fabric when you stretch it between your fingers, it will likely be see-through over your bump.

Bust Support Matters More Than You Think

Your breasts may increase by one to three cup sizes during pregnancy, and many women underestimate how much this affects swimsuit fit. If you start at a C cup or above, prioritize suits with built-in bras, wide straps, and removable padding. Cross-back and front-cross designs distribute weight better than halter necks, which can cause neck strain for larger busts.

Removable padding is a feature worth having because it lets you customize your level of modesty and shaping. You can always remove pads if they feel too warm, but you cannot add support to a suit that lacks it.

Coverage and Style Preferences

Maternity one-piece swimsuits come in several coverage levels. Full-coverage suits like the Charmo Swim Dress provide maximum modesty with skirted bottoms. Standard one-pieces with ruched sides offer moderate coverage that grows with you. Cut-out designs give your belly room to breathe but expose more skin. Think about where you will wear the suit most: public pools, private beaches, resort vacations, or water exercise classes all call for different levels of coverage.

The boyleg and boyshort styles, like the EastElegant, appeal to active swimmers but can ride up during movement. Standard bikini-cut bottoms stay in place better but provide less coverage on the legs.

Sizing Guidance for Maternity Swimwear

Most maternity swimwear is designed to fit your pre-pregnancy size with built-in room for growth. However, there are exceptions. The EastElegant suit on this list runs small and requires sizing up. As a general rule, order your pre-pregnancy size for most brands, but always check the reviews for sizing-specific feedback.

If you are between sizes or carrying twins, sizing up is usually the safer choice. A slightly loose suit is far more comfortable than one that digs into your ribs or rides up constantly. You can also consider buying a suit in your second trimester and expecting it to fit through delivery because the ruching and stretch should accommodate your growth.

Multi-Stage Wear: Pregnancy Through Postpartum

The best maternity swimsuits work beyond pregnancy. Suits with nursing access, like the Summer Mae Cross Back with its button neck, transition seamlessly into the postpartum period. Ruched designs that expand during pregnancy also compress gently after delivery, which many women find comfortable as their bodies recover.

If you want maximum value from your purchase, look for suits that explicitly mention postpartum or nursing compatibility. Several suits on this list, including the Charmo Ruffle Ribbed High-Waisted and the Summer Mae Cross Back, are designed for this dual-purpose wear.

Sun Protection

Skin becomes more sensitive during pregnancy, making sun protection in swimwear more important than usual. The Charmo Scalloped Cut Out on this list features UPF 50+ fabric, which blocks 98% of UV rays. If your suit does not have built-in UPF protection, pair it with a maternity rash guard for extended outdoor exposure.

Remember that stretched fabric provides less sun protection than unstretched fabric, so a UPF-rated suit that fits loosely offers better protection than one stretched tight over your belly.

FAQs

Final Thoughts on Maternity One Piece Swimsuits

After weeks of testing and researching the best maternity swimsuits one piece options available in 2026, a few clear winners emerged. The Charmo Ruffle Ribbed Cutout Swim Dress earned our Editor’s Choice for its unmatched combination of coverage, comfort, and style. For the best overall value, the Summer Mae Cross Back delivers reliable quality with the added bonus of nursing access. And for budget-conscious shoppers, the Charmo Scalloped Cut Out provides surprisingly solid features at an accessible price point.

Your perfect maternity swimsuit depends on your specific needs: bust size, activity level, coverage preferences, and whether you want a suit that transitions into postpartum. Whichever you choose, prioritize stretchy fabric, adjustable straps, and ruched sides because these three features make the biggest difference in how a suit fits and feels throughout your pregnancy.