Whenever the sun comes out to play, one of the best places to spend your time is by the pool, lake, or beach. This means you need a flattering swim shirt and a pair of swim trunks. Unfortunately for a fat guy, getting the best swim shirt isn’t a walk in the park. There are limited options.

The best rash guard swim shirt for a fat guy should have UV protection, look good enough to flatter your body shape and be large enough to fit.

Luckily, I spent most of my time in the past summers researching and finding the best swim shirts for fat guys and found a couple that I love. My favorite is the Kanu Surf Men’s Cb Rashguard UPF 50+ Swim Shirt.

Best Swim Shirts for Fat Guys

Kanu Surf Men’s Cb Rashguard UPF 50+ Swim Shirt

Kanu Surf Men's Cb Rashguard UPF 50+ Swim Shirt
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Kanu offers some of the best swim shirts for tall guys. It’s a US-based brand that’s been operational since 1997. Their years of experience provide them with insight into qualities they need to infuse into big and tall swim shirts for comfort, protection, and efficiency.

The Kanu Rashguard has a UPF 50+; hence it offers great sun protection. Moreover, it fits well and has sizes ranging from small to 5X. For versatility, it comes in multiple colors.

The short-sleeve shirt has a crew neckline making it perfect for layering or wear it alone. It fits snug and is more adaptable compared to shirts with regular necklines.

The Kanu Surf Rash Guard swim shirt is made from polyester. This material is made with excellent breathability and fast-drying capability. Polyester also makes the clothing lightweight even when wet. It will not drag you down as you leave the water as other shirts do.


  • Actual to size
  • Available in different colors
  • Different color options
  • Machine washable
  • Solid stitching


  • Chokes the neck

H2O Sport Tech Big & Tall Men’s Short Sleeve Swim Shirt

H2O Sport Tech Big & Tall Men's Short Sleeve Swim Shirt
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Though the company claims this shirt is true to size, I noted that it runs very large. It’s larger in the shoulders, chest, and length, which leaves room for a range of movements. For a better fit, I recommend getting one or two sizes down. The sizes range from XX-large big to 6X-large big.

The H20 Sport Tech Big and Tall Men’s Short Sleeve is loose-fitting, so it flatters your body. It has elbow-length short sleeves and has 50+ sun protection to protect your skin when in and out of water.

Aside from size, these high-quality shirts feels comfortable on the skin, courtesy of the 100% polyester material. The material allows this swim short to dry fast.

If you hate swim shirts that are too snug around the stomach, you’ll love the H20 Sport Tech Big and Tall Men’s Short Sleeve Swim Shirt.


  • Doesn’t hug the stomach
  • Dries fast
  • Doesn’t chafe nipples
  • Large and long


  • The logo is a little too large
  • The collar is a little tight
  • Too clingy when you exit the waters

Aqua Design Rash Guard Men Swim Shirt

Aqua Design Rash Guard Men Swim Shirt
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Aqua is one of the best swim shirts for men looking for a shirt that’s not too tight and loose. It’s made from AquaPoly material that’s 85% polyester and 15% spandex fabric. This fabric is breathable, moisture-wicking, fast-drying, and has a 50+ UPF UV and sun protection rating. I noted it dries within a minute of leaving the water.

The 15% spandex used in the material allows for unrestricted range of motion that is crucial when swimming, rowing, paddling, surfing, fishing, snorkeling, wakeboarding, and other summertime activities.

I especially loved that it has a comfortable fit and a flatlock stitch which offers better comfort. Unlike most swim shirts, the Aqua Design Rash Guard Men features unique water camouflage patterns, including Liquid lava, black water, royal ripple, and aqua sky.


  • Cold machine wash
  • Available up to 6X-large
  • Runs true to size
  • Retains shape and isn’t too hot


  • A little too heavy and thick
  • The material is fragile and picks easily

Speedo Men’s UV Swim Shirt Short Sleeve Loose Fit Easy Tee

Speedo Men's UV Swim Shirt Short Sleeve Loose Fit Easy Tee
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Speedo provides a wide range of short sleeve swimsuits for the whole family. Therefore, it’s no surprise it offers one of the best swim shirts for fat guys. As for quality, Speedo has been making the best with the tech features available.

This Speedo Men’s UV Swim Shirt is designed from 100% polyester and has a polyester lining. The fabric has low-moisture absorption and is quick-drying for added comfort when you leave the water. Despite the lining, the shirt is soft, lightweight, and breathable.

The shirt also has UV and UPF 50+ protection which protects you from sunburns. This rash guard is also durable and has a loose fit. The sizes range up to 4X-large big tall. If you need a tighter fit, you should purchase a size smaller.


  • Available in multiple colors
  • Water repellent
  • Quick dry
  • Pilling resistant hence durable


  • It clings to the body when you leave the water
  • Only hand wash
  • Thick shirt

Vapor Apparel Men’s UPF 50+ UV Sun Protection Long Sleeve T-Shirt

Vapor Apparel Men's UPF 50+ UV Sun Protection Long Sleeve T-Shirt
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This is another best swim tee for big guys available in many different colors. Vapor swim shirts are made from microfiber polyester with UPF/UV 50+ protection technology that helps protect your skin from UVB rays. And since it has long sleeves, your whole upper body is protected.

This technology is built into the fabric and does not wear out with multiple washes. However, you need to wash it with cold water to protect the technology. Also, don’t use fabric softener on the swim tee as it might damage the UV?UPF protection properties over time.

Aside from this, the microfiber polyester material is lightweight and wicks moisture to keep you dry. Unlike other tall rash guard swim shirts, this shirt has anti-odor technology that keeps you odor-free all day long.

The clothing fits great and has sizes up to 4X-Large. It has a set-in-shoulder construction that offers a natural and flattering shape. It is true to size around the shoulder and has a slimmer fitting in the rest of the body.


  • Fights odor
  • Long sleeve for excellent sun protection
  • Lightweight and doesn’t stretch
  • Perfect when worn under clothes


  • Fabric is a little clingy

Roadbox UPF 50+ Fishing Shirts for Men Long Sleeve UV Sun Protection Tops

Roadbox UPF 50+ Fishing Shirts for Men Long Sleeve UV Sun Protection Tops
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This is another great long-sleeved swim t-shirt made from 100% polyester with UPF 50+ protection and quick-drying features. You can wear it alone in water sports or as an undershirt when you go hiking. The rash guard is breathable hence keeps you dry and cool during workouts, fishing, and running.

While it’s great for outdoor activities and swimming, it’ll cling onto your body when leaving the water. I love that it has a tag-free collar and flatlock seams, which reduce chafing and increase your comfort.


  • It’s light
  • It’s not too tight or too loose
  • Dries fast
  • Goes for a great price
  • Has a modern design


  • Doesn’t wick moisture
  • It is loose around the body and tight on the arms

TSLA Men’s UPF 50+ Long Sleeve Rash Guard

TSLA Men's UPF 50+ Long Sleeve Rash Guard
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This is a great tall swim shirt that’s durable, stretches, and comfortable. The fabric is made from a mix of 88% polyester and 12% polyurethane. The fabric has 50+ UPF/SPF UV protection which protects your skin from harmful UV rays.

The fabric is high density and durable, which gives protection against abrasions and rashes. The fat guy swimming shirt stretches in four ways allowing for unrestricted movement and has moisture-wicking abilities which disperse sweat and cool your body. Moreover, the material has quick-dry material that not only keeps you dry but also odour-free.


  • No seams; hence it’s extremely smooth
  • Available in different colors
  • True-fit size
  • Fits up to 3X large


  • They are a snug fit

And The Winner Is…

Kanu Surf Med's Cb Rash Guard

Kanu Surf Men's Cb Rashguard UPF 50+ Swim Shirt

The best swim shirts for fat guys are ideal for wearing in the pool or engaging in other water sports. The Kanu Surf Med’s Cb Rash Guard is ideal for its sun protection, comfortable fit, lightweight, and fast-drying abilities.

When buying a swim shirt from the best swim shirt list, ensure you choose the right size for your body shape. It’s good to take measurements before paying to ensure you get the ideal fit. Remember, some shirts are true-fits, and others run a little smaller or larger.

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Frequently Asked Questions

What Should Fat Guys Wear to Swim?

Fat guys should wear anything that they feel comfortable in. Tall rash guard shirts are perfect for their protection from the sun’s harmful rays and ideal fitting. The t-shirt should be lightweight and protect you from chaffing.

How Should a Fat Man Dress at the Beach?

Big guys should wear dark colors like navy and shades of gray. Also, wear the correct sizes. Getting oversized rash guards will make you feel like you have a parachute dragging you behind. Kanu Surf Men’s Cb Rashguard is perfect given it’s available in gray and has a range of tall sizes. You can easily pick your ideal size.

Can any Shirt be a Swim Shirt?

No, they cannot. Regular t-shirts increase the chances of drowning as they soak up water and weigh swimmers down. Moreover, they pollute the water by bringing germs and clutter the pool’s filtration system with loose strands. The Kanu Surf Men’s Cb Rashguard is lightweight and made from polyester, which counteracts the drowning and loose strand issues.

Should a Swim Shirt be Tight?

When you order surf shirts, they should be comfortable and loose. However, it shouldn’t be too loose to increase the risk of getting caught in equipment. If you need one with UV protection, rash guards are the best. Though the Kanu Surf Men’s Cb Rashguard is a loose fit, it’s ideal for fat guys and flatters their body shape.

For more information and tips on living your best life check out the rest of Extra Large Living.