The Return of Long Swim Trunks: The Surf Trend Dominating in 2026
For several years, short swim trunks dominated beaches, pools, and social media. However, 2026 is marking a very clear change: long swim trunks are back, and they have returned stronger than ever.
Major surf brands like Billabong, Rip Curl, Quiksilver, Hurley, and RVCA are bringing back 21-inch boardshorts, a style many surfers never stopped wearing and which is now conquering urban fashion too.
If you're thinking of buying new swim trunks this summer, you've probably noticed that more and more long models are appearing. It's no coincidence. It's the most important trend of the season.
Why are long swim trunks back in style?
Fashion always moves in cycles. Just as retro sneakers, trucker hats, and oversized t-shirts have made a comeback, it's now the turn of classic boardshorts.
But this time, they're not just returning out of nostalgia.
New generations have discovered that long swim trunks offer a different, more authentic style, closely linked to the original surf culture of California, Hawaii, and Australia.
Today, 21-inch swim trunks convey a much more technical and "surfer" image than many excessively short models.
What does it mean for swim trunks to be 21 inches?
When we talk about 21-inch swim trunks, we are referring to the total outseam length.
In practice, this means:
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They reach approximately to the middle of the knee.
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They offer greater coverage.
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They are very comfortable for surfing.
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They prevent chafing with wax and the board.
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They have a classic aesthetic that never goes out of style.
Precisely for this reason, they remain the favorite length among many surfers.
The difference between 17", 19", and 21" swim trunks
Each length completely changes the style.
17 inches
The swim trunks fall quite a bit above the knee.
This is a modern, light option often used for pools or beaches.
19 inches
This is probably the most balanced length currently.
It falls just above the knee and works for both surfing and daily wear.
21 inches
This is the authentic classic boardshort.
It covers about mid-knee and offers that surfer look that is once again dominating the 2026 collections.
The 5 long swim trunks that best represent this trend
At THE SURF TOWN, we have selected some of the models that best reflect the return of long boardshorts.
Billabong Throw On LB Black 21"
One of the most versatile models in the collection.
Its black color pairs with almost any t-shirt, rashguard, or hoodie and perfectly represents the classic surf style.
Ideal for those looking for comfortable swim trunks for the entire summer.
Billabong Piped Pro Dark Denim 21"
Designed for those who want technical boardshorts with a clean and elegant design.
Its Performance Fit allows for complete freedom while surfing without losing that long aesthetic that is so popular this year.
Billabong Fluid 2K Pro Pewter 21"
A more sporty option.
Its gray color makes it easy to combine with any outfit, and its stretchy fabric makes it a favorite for those who spend many hours in the water.
Billabong Straddie Pro Blue Fog 21"
Inspired by classic surf.
Its color combination recalls the boardshorts that made Billabong famous for decades.
It's one of those swim trunks that rarely go out of style.
Billabong DBAH Bio Wave Pro Vintage White 21"
Probably one of the most striking designs in the collection.
The contrast between white and black, combined with its 21-inch length, achieves a very elegant result for both the beach and the promenade.
Are long swim trunks more comfortable?
For many surfers, the answer is still yes.
By offering greater length:
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They better protect the skin when paddling.
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They reduce friction with the board.
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They provide a greater sense of freedom while surfing.
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They are very comfortable for walking or spending all day at the beach.
Furthermore, today's fabrics are infinitely lighter than they were a few years ago.
Today, 21-inch boardshorts weigh very little and dry quickly.
Who should choose long swim trunks?
This type of swim trunk is especially recommended for:
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Regular surfers.
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Tall individuals.
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Those who prefer a more relaxed style.
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Users looking for all-day swim trunks.
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Lovers of classic surf.
The influence of professional surfing
Many surfers on the Championship Tour still use long boardshorts.
While each athlete has their preferences, major brands continue to bet on this type of cut because it offers an excellent combination of comfort, mobility, and aesthetics.
This has caused fashion to shift from the water back to the street.
Will short swim trunks disappear?
Not at all.
17-inch and 19-inch models will remain very popular.
What we are seeing in 2026 is a coexistence of both styles.
However, the growth of 21-inch swim trunks is evident, and more references appear in the main collections each season.
Everything indicates that we are witnessing the definitive return of the classic boardshort.
Conclusion
Long swim trunks are no longer a passing trend and have once again become one of the main protagonists of summer 2026.
Their authentically surfer aesthetic, the comfort they offer in and out of the water, and the return of classic designs from brands like Billabong explain why more and more people are choosing 21-inch models again.
If you are looking for swim trunks with personality, designed to last many summers, and with the authentic DNA of surf, this may be the perfect time to go for long boardshorts again.
At THE SURF TOWN, we closely follow the evolution of major surf brands and select the models that truly represent the trends that are shaping the present and future of surf fashion.
- If you want to know how swim trunks size according to inches, we also recommend this article from our blog:
https://www.thesurftown.com/blogs/news/como-tallan-los-banadores-segun-las-pulgadas-guia-definitiva-de-15-17-18-19-20-21-y-22-2026
