What's the difference between swim trunks and boardshorts? The ultimate guide to choosing the right one (2026)
If you've ever looked for swim trunks for this summer, you've probably come across terms like boardshorts, surf shorts, 17-inch swim trunks, or 21-inch swim trunks. To many, they seem the same, but in reality, there are important differences that can make one garment perfect for you or lead you to buy the wrong one.
In this guide, you'll discover the difference between traditional swim trunks and boardshorts, which is the best option depending on how you'll use it, and why more and more people are choosing these types of garments for much more than just surfing.
What are traditional swim trunks?
Traditional swim trunks are designed primarily for enjoying the beach, pool, and vacations.
Their main characteristics are:
-
Inner mesh lining for greater comfort.
-
Lightweight and quick-drying fabrics.
-
Elastic waistband with adjustable drawstring.
-
Great comfort for daily use.
-
Designs available in a multitude of colors and patterns.
They are the ideal choice for those looking for comfortable, practical swim trunks perfect for summer days.
What are boardshorts?
Boardshorts originated in the surfing world and are designed to offer maximum performance in the water.
Unlike traditional swim trunks, they typically do not include an inner mesh lining, use more resistant technical fabrics, and provide superior freedom of movement.
Thanks to their design, they better withstand rubbing against a surfboard and are very comfortable for water sports such as surfing, paddleboarding, wakeboarding, or kitesurfing.
Over the years, boardshorts have ceased to be an exclusive garment for surfers and today are one of the most widely used shorts during the summer.
Main differences between swim trunks and boardshorts
| Traditional Swim Trunks | Boardshorts |
|---|---|
| Have an inner mesh lining | Typically no mesh lining |
| Designed for beach and pool | Designed for surfing and water sports |
| Lighter | More resistant |
| Very comfortable for swimming | Greater freedom of movement |
| Elastic waistband | Drawstring and Velcro closure in many models |
Which one dries faster?
Currently, both swim trunks and boardshorts use quick-drying fabrics.
Leading surf brands develop technical fabrics that allow you to go from the water to the boardwalk in a very short time.
Additionally, many models incorporate elastane to improve elasticity and comfort.
Which is better for surfing?
If you surf, the best option is boardshorts.
They are specifically designed for paddling, standing up on the board, and moving with complete freedom without discomfort.
That's why practically all surfers use this type of swimwear.
What about for paddleboarding?
This is also the most recommended option.
Boardshorts allow for comfortable paddling, don't restrict movement, and dry very quickly when you get out of the water.
What about for going to the pool?
In this case, either option works perfectly.
If you're only looking to swim and relax, traditional swim trunks are an excellent choice.
If you also want to use the same garment for walking, eating, traveling, or spending the whole day out of the house, boardshorts offer greater versatility.
What do the inches in swim trunks mean?
When swim trunks indicate 17", 19", or 21", that measurement refers approximately to their outer length.
17-inch swim trunks
These are the shortest.
They sit above the knee and offer a modern and sporty style.
They are ideal for those seeking comfort and maximum freedom of movement.
19-inch swim trunks
They reach approximately knee height.
This is the most balanced length and the favorite for most users.
21-inch swim trunks
They cover the knee slightly.
These are the classic long boardshorts traditionally used by many surfers.
Which option should I choose?
If you're looking for swim trunks for vacation, the beach, or the pool, traditional swim trunks will serve their purpose perfectly.
If you surf, paddleboard, or want a garment you can wear all day long, boardshorts will probably be the best choice.
The best swim trunk and boardshort brands
Brands specializing in surfing have been developing garments designed for the sea for decades.
Among the most recognized are:
Each offers different lengths, technical fabrics, and designs adapted to all styles.
Frequently asked questions
Do all boardshorts have an inner mesh lining?
No. Most do not have a mesh lining to avoid chafing while surfing.
Can boardshorts be used for walking or traveling?
Yes. In fact, many people use them as shorts throughout the summer thanks to their comfort and quick-drying properties.
Which length is most recommended?
19-inch models usually offer the best balance between comfort, aesthetics, and freedom of movement.
Are boardshorts only for surfers?
No. Nowadays, they are one of the most widely used garments for the beach, pool, vacations, walks, and water sports.
Conclusion
Although many people use the words swim trunks and boardshorts interchangeably, there are important differences between them. Choosing one or the other will primarily depend on how you intend to use them. If you're looking for comfortable swimwear to enjoy the beach or pool, traditional swim trunks will be an excellent option. If you prefer greater freedom of movement, practice water sports, or want a versatile garment for the entire summer, boardshorts are the perfect choice.
At THE SURF TOWN, you'll find a wide selection of swim trunks and boardshorts from the best surf brands, with 17, 19, and 21-inch models so you can find the one that best suits your style and your way of enjoying the summer.
